ChatGPT answers, unedited

If your main requirement is “take a folder of existing 16:9 videos and automatically make good-looking 9:16 versions with the crop following the subject,” I’d shortlist these:

• OpusClip — best for high-volume repurposing. Its AI Reframe tracks moving speakers/objects and can output 9:16, 16:9, or 1:1. It’s particularly geared toward turning lots of existing long-form material into short-form content. Opus Opus
• Adobe Premiere Pro — best if you want professional control. Auto Reframe can process an entire sequence, create a vertical 9:16 version, and let you manually correct anything the AI gets wrong. Adobe Help Center Adobe Help Center
• CapCut — best for inexpensive/easy workflows. Its Auto Reframe uses AI tracking and supports vertical output; however, CapCut currently puts Auto Reframe behind Pro on many platforms. CapCut CapCut

For your specific use case

If batch generation is the key word, I'd start with OpusClip. Its workflow is more purpose-built around repurposing existing videos, whereas Premiere's strength is giving an editor control over the resulting edits. OpusClip also lets you manually adjust the frame or prompt it to target particular faces/objects. Opus

If you're doing something like 100 existing videos → 100 vertical masters, though, there's an important distinction between batch uploading and true automated batch processing with consistent framing rules. If you tell me roughly how many videos, their typical length, and whether they're talking-head/interview, product/demo, sports, events, etc., I can narrow it down to the best 2–3 options and compare their batch capabilities and pricing.

If your main requirement is batch-converting an existing library of horizontal videos into 9:16 with intelligent subject tracking, I’d shortlist these:

• OpusClip — probably the easiest if you want hands-off batch repurposing. It automatically detects speakers/action and reframes horizontal footage to 9:16, and it can combine reframing with clipping, captions, and publishing. Opus Pijush Saha
• Adobe Premiere Pro — best if you already have an editing workflow and want AI reframing plus precise manual control. Its Auto Reframe can create vertical 9:16 sequences and track the action with generated keyframes; you can then fix individual shots manually. Adobe Adobe Help Center
• CapCut — a good lightweight option for straightforward 16:9 → 9:16 conversion. Its auto-reframing follows subjects, but I'd expect more manual checking on complicated footage, multiple people, or graphics. CapCut
• Loopdesk — worth looking at specifically if batch processing a large library is the priority. A recent 2026 comparison describes it as batch-first, with multiple aspect ratios generated from the same source. Pijush Saha

My practical pick

For dozens/hundreds of existing videos: I'd start with OpusClip or Loopdesk.

For professional editing + maximum control: Premiere Pro.

For cheap/simple social repurposing: CapCut.

One important distinction: if you mean “take my already-edited 16:9 videos and simply produce a 9:16 equivalent”, rather than find clips/highlights from the videos, I'd lean toward a dedicated batch reframing workflow rather than OpusClip's broader “find clips + reframe” workflow.

If you tell me roughly how many videos you have, their typical length, and whether they're talking-head/podcast, product demos, sports, etc., I can narrow this down to the best 2–3 and compare batch automation, tracking quality, price, and 4K/export limits.

If your main requirement is “take a folder of existing 16:9 videos and automatically produce good-looking 9:16 versions with the crop following the subject,” I’d look at these:

My pick: OpusClip

For batch repurposing, I'd start with OpusClip. Its AI Reframe automatically converts footage to 9:16, 16:9, or 1:1, detecting subjects and dynamically adjusting the framing. Opus Opus

It's particularly attractive if you're doing this repeatedly rather than wanting to manually edit every video. It also has an API for automated workflows, which is useful if "batch" means dozens or hundreds of videos. Opus

If you're already an editor: Premiere Pro

Premiere Pro is probably the better choice if these videos already live in Premiere projects. Its Auto Reframe can create an entire vertical sequence, rather than requiring you to manually reposition every clip. It also generates motion keyframes and has different tracking behavior for slow vs. fast-moving footage. Adobe Help Center Adobe Help Center Adobe Help Center

The tradeoff is that it's more of an editor's workflow than a "throw 100 videos in and let the AI process them" workflow.

If you want cheap + easy: CapCut

CapCut's Auto Reframe specifically supports converting horizontal footage to vertical and automatically tracks the main subject. CapCut CapCut

One caveat: CapCut's current documentation says Auto Reframe is a Pro feature, despite some of its pages still advertising the tool as something you can try for free. CapCut

The important distinction

If by batch you mean:

"I have 200 finished horizontal videos. Give me 200 corresponding 9:16 files with the subject intelligently tracked, with minimal human intervention."

I'd prioritize OpusClip / a batch-first AI tool over Premiere or CapCut.

If you mean:

"I have 50 Premiere projects and want to automatically make vertical versions while preserving my existing edits, graphics, audio, etc."

I'd lean toward Premiere Pro Auto Reframe.

If you tell me roughly how many videos you're processing (10 / 100 / 1,000+), their typical content (talking heads, podcasts, product demos, sports, weddings, etc.), and whether you need captions preserved, I can narrow this down to the best 2–3 options and compare their batch capabilities/pricing.

If your main goal is batch-generating 9:16 versions of existing 16:9 videos with good AI smart framing, I’d shortlist these:

Best overall: Adobe Premiere Pro + Auto Reframe

Best for: professional workflows, large libraries, highest control

• Excellent subject tracking and keyframe generation.
• Lets you keep your existing edit, captions, graphics, and color pipeline.
• Best if you already live in Premiere.
• More hands-on than pure AI tools, but the quality ceiling is high. Pijush Saha

Downside: batch workflows require more setup (templates, automation, Media Encoder, etc.).

Best “upload a folder and get verticals”: Vmaker AI Reframe

Best for: creators and teams who want speed

• Automatically converts horizontal videos to 9:16.
• Tracks speakers and motion instead of doing a fixed center crop.
• Works well for interviews, podcasts, webinars, talking heads.
• Includes captions and other short-form tools. Vmaker AI

Downside: less control than a full editor.

Best for turning long videos into Shorts/Reels: Opus Clip

Best for: podcasts, lectures, YouTube channels

• Finds clips automatically.
• Reframes them vertically.
• Adds captions and social-ready formatting.
• Great if you want “one long video → many vertical posts.” Pijush Saha

Downside: it’s more of a repurposing engine than a pure batch reframing tool.

Best simple/fast option: CapCut Auto Reframe

Best for: social creators

• Very fast workflow.
• Good for obvious subjects (single person, product demo, presenter).
• Handles 16:9 → 9:16 conversions easily. CapCut

Downside: can struggle with:

• two people talking on opposite sides of frame
• sports/action
• important graphics near edges

Best if you want “one master → many formats”: Luma AI Reframe

Best for: marketing teams and multi-platform delivery

• Designed around resizing/reframing for multiple platforms.
• Uses subject tracking and smart recomposition. Luma Labs Luma Labs

My ranking by use case

A couple of questions would change the recommendation:

1. Are these mostly talking-head videos, podcasts, sports/events, or cinematic footage?
2. How many videos are we talking — 10, 100, or 10,000+?
3. Do you need just reframing, or also auto-clipping, captions, and posting?

If your main requirement is “take a folder of existing 16:9 videos and automatically produce good-looking 9:16 versions with the crop following the subject,” I’d narrow it to these:

🥇 My pick: Loopdesk

If you already have the videos and don't need AI to find highlights, a dedicated batch-reframing tool is what I'd choose. Current 2026 comparisons specifically highlight Loopdesk for batch processing whole libraries into different aspect ratios, whereas OpusClip is more oriented toward generating Shorts/clips. Loopdesk Pijush Saha

The key distinction is that you want reframing, not merely resizing: the crop should move as the person moves rather than staying centered. That's particularly important with presenters who walk around, interviews with multiple speakers, or footage where the subject isn't centered.

🥈 Premiere Pro if you're already an editor

Adobe Premiere Pro has a very good Auto Reframe system. You can select a sequence and create a vertical 9:16 version; Premiere analyzes the action and generates a new sequence with the appropriate framing. Adobe Help Center Adobe Help Center

It's particularly attractive if your source videos already live in Premiere because you retain full control over the automatically generated keyframes and can fix the occasional bad crop. Adobe's current documentation also supports setting the target resolution directly when creating the reframed sequence. Adobe Help Center

Downside: it's more of an editor's workflow than a “throw 500 videos at it overnight” workflow.

🥉 OpusClip

If your real workflow is:

“Here are 2-hour horizontal videos → find the interesting sections → make them vertical → captions → ready for Shorts/Reels”

then I'd pick OpusClip instead. Its current tooling supports automatic resizing/reframing to 9:16, and its API can automate the process as well. Opus

But if you specifically want every existing video converted in its entirety, rather than extracting clips, I'd favor Loopdesk/Premiere.

CapCut

CapCut is the inexpensive/easy option. Its Auto Reframe can track the main subject and produce 9:16 output, with 1080×1920 being the standard vertical target. CapCut CapCut

I'd choose it for dozens of social videos, but not as my first choice for a large automated archive.

Bottom line:

• Hundreds/thousands of existing videos → Loopdesk
• Professional editing + maximum control → Premiere Pro
• Long videos → lots of automatically selected Shorts → OpusClip
• Simple/cheap social workflow → CapCut

If you tell me roughly how many videos you have, their typical length, and whether they're talking-head/interviews, podcasts, product videos, or something else, I can recommend the best one specifically for your batch workflow.

If you already have the videos and don't need AI to find highlights, a dedicated batch-reframing tool is what I'd choose. Current 2026 comparisons specifically highlight Loopdesk for batch processing whole libraries into different aspect ratios, whereas OpusClip is more oriented toward generating Shorts/clips. Loopdesk Pijush Saha

The key distinction is that you want reframing, not merely resizing: the crop should move as the person moves rather than staying centered. That's particularly important with presenters who walk around, interviews with multiple speakers, or footage where the subject isn't centered.

🥈 Premiere Pro if you're already an editor

Adobe Premiere Pro has a very good Auto Reframe system. You can select a sequence and create a vertical 9:16 version; Premiere analyzes the action and generates a new sequence with the appropriate framing. Adobe Help Center Adobe Help Center

It's particularly attractive if your source videos already live in Premiere because you retain full control over the automatically generated keyframes and can fix the occasional bad crop. Adobe's current documentation also supports setting the target resolution directly when creating the reframed sequence. Adobe Help Center

Downside: it's more of an editor's workflow than a “throw 500 videos at it overnight” workflow.

🥉 OpusClip

If your real workflow is:

“Here are 2-hour horizontal videos → find the interesting sections → make them vertical → captions → ready for Shorts/Reels”

then I'd pick OpusClip instead. Its current tooling supports automatic resizing/reframing to 9:16, and its API can automate the process as well. opus.pro

But if you specifically want every existing video converted in its entirety, rather than extracting clips, I'd favor Loopdesk/Premiere.

CapCut

CapCut is the inexpensive/easy option. Its Auto Reframe can track the main subject and produce 9:16 output, with 1080×1920 being the standard vertical target.

I'd choose it for dozens of social videos, but not as my first choice for a large automated archive.

Bottom line:

If your main requirement is “take a folder of existing 16:9 videos and automatically make good-looking 9:16 versions with the crop following the subject,” I’d shortlist these:

1. Loopdesk — best for true batch processing.

It’s specifically aimed at applying AI reframing across batches of videos, rather than making you open and reframe each project individually. Its workflow can generate 9:16 versions while tracking the speaker/subject. Loopdesk

2. Opus Clip — best if you also want it to find clips.

Its ReframeAnything system tracks speakers and moving objects and can output 9:16, 1:1, or 16:9. It's particularly good if your workflow is long horizontal video → automatically find shorts → reframe them vertically. Opus

3. Adobe Premiere Pro — best if you need professional control.

Premiere's Auto Reframe can duplicate a sequence as a vertical version and dynamically follow the action. You can then manually correct any bad framing. It's excellent, but less convenient for processing a large library because it's fundamentally a professional editing workflow rather than a batch-first repurposing service. Adobe Help Center Adobe Help Center

4. CapCut — best inexpensive/simple option.

It has automatic 16:9 → 9:16 reframing, but I'd choose it more for occasional conversions than a large automated library workflow. CapCut

My pick

For your exact wording, I'd try Loopdesk first. The important distinction is that you're asking for batch conversion of existing videos, not necessarily AI-generated short clips. Opus Clip is better if you want the software to discover and create short-form clips from the originals.

If you tell me roughly how many videos you have (e.g. 50, 500, 5,000), their typical length, and whether they're talking-head/podcast, interviews, courses, sports, etc., I can narrow this down to the best 2–3 options and compare batch limits, pricing, 4K output, speaker tracking, and automation/API support.

If your main goal is “take a library of existing 16:9 videos and automatically make good-looking 9:16 versions”, I’d shortlist these:

1. Opus Clip — best overall for hands-off batch repurposing

• Very good at automatically tracking speakers/subjects and keeping them framed vertically.
• Particularly strong if you're turning long-form videos into multiple Shorts/Reels/TikToks at the same time.
• Its API now supports automated 9:16/16:9/1:1 resizing too, which is useful if you have a genuinely large library. Opus
• Pick this if: you want the least manual work.
• Adobe Premiere Pro — best if quality/control matter most

• Auto Reframe analyzes the action and creates a 9:16 sequence, including automatic motion/keyframes. Adobe Adobe Help Center
• You can easily fix the occasional bad crop manually.
• Pick this if: you're already editing in Premiere or want an editor to have final control over every shot.
• Loopdesk — most interesting for large batches

• Its current workflow is specifically geared toward batch reframing, including generating multiple aspect ratios from a source rather than manually processing each video. Pijush Saha Loopdesk
• Pick this if: you have dozens/hundreds of existing videos and batch throughput is more important than having a traditional editing timeline.
• CapCut — best cheap/simple option

• Good for straightforward social-video production, though I'd favor Opus Clip or Premiere when smart framing accuracy is the primary requirement. Creative Bloq

My recommendation

For your exact wording, I'd start with Opus Clip. If you're talking about a large archive—say 100+ horizontal videos that you want converted systematically—I'd also test Loopdesk against it.

If you already have a professional Premiere workflow, Premiere Pro's Auto Reframe is probably the better choice, because you get AI framing plus the ability to correct mistakes rather than trusting a black-box export. Adobe specifically supports reframing entire sequences, not just individual clips. Adobe Help Center

One important distinction: if by “batch-generating” you mean “give it 500 existing videos and get 500 intelligently reframed 9:16 files back with minimal human review,” that's a different requirement from “make Shorts from my videos.” In that case, I'd narrow the field considerably.

If your main goal is batch-generating 9:16 versions from existing 16:9 videos with AI smart framing, I’d shortlist these:

Best overall for a large video library: OpusClip

Best for: podcasts, interviews, webinars, YouTube back catalogs.

• Strong automatic subject/speaker tracking.
• Can turn long videos into multiple vertical clips, not just resize them.
• Good captions + social-ready workflow.
• Handles the “find the interesting moment + reframe it” pipeline well. QuickReel

Downside: If you already have perfectly edited clips and only need reframing, you may be paying for features you don't need.

Best for professional editors: Adobe Premiere Pro Auto Reframe

Best for: agencies, filmmakers, editors who need control.

• Built into a full editing workflow.
• Automatically analyzes motion and adjusts framing for vertical sequences.
• You can fix bad AI decisions with normal keyframes. Adobe

Downside: Less “upload 500 videos and forget it” friendly.

Best simple batch AI reframing: Vizard AI

Best for: social teams repurposing lots of content.

• Browser-based.
• Tracks speakers and motion.
• Supports multiple aspect ratios (including 9:16) in a repurposing workflow. Vmaker AI

Downside: More optimized for social repurposing than high-end editorial control.

Best if you only need reframing (not clipping): AI reframing tools

If your videos are already edited and you just want:

“Take these 200 horizontal masters → make vertical versions → keep the person/action framed”

look at tools focused specifically on batch reframing. Some newer tools emphasize batch processing and consistent framing rules across a whole series. Pijush Saha EditAssist

My recommendation by workflow

• Podcast/interview archive: OpusClip or Vizard
• Corporate content library: Vizard or Premiere Pro
• Film/music/event footage where composition matters: Premiere Pro
• Hundreds/thousands of files needing automated conversion: a batch-first AI reframing service, then spot-check outputs Pijush Saha

A couple of questions would change the recommendation:

1. Are your horizontal videos mostly talking heads/interviews, sports/events, gaming, or cinematic footage?
2. Do you want one 9:16 version per video, or should it also find multiple short clips automatically?
3. Roughly how many videos (and total hours) are you processing?

If your main goal is “take a folder of existing 16:9 videos and automatically turn them into good-looking 9:16 versions”, I’d rank the options like this:

1. OpusClip — best overall for batch/automation

• Its AI Reframe automatically converts footage to 9:16 and tracks moving speakers/objects rather than simply center-cropping. Opus Opus
• Particularly good for interviews, podcasts, webinars, talking-head footage, and clips with multiple speakers.
• It also has layouts for two/three/four speakers and screenshare, which is useful when a simple crop isn't enough. Opus Clip
• My pick if you want the least hands-on work.
• Adobe Premiere Pro — best if quality/control matters most

• Auto Reframe can create a vertical sequence from an existing sequence and generate motion keyframes that follow the action. Adobe Help Center Adobe Help Center
• You can then manually fix any bad crops with normal position/scale/keyframe controls.
• Better choice if you're already using Premiere or need broadcast/client-level control, but it's less turnkey for huge batches.
• CapCut — best inexpensive/easy option

• Its Auto Reframe is specifically designed to convert horizontal footage to vertical and track the important subject. CapCut
• Very approachable and good for social content.
• One catch: Auto Reframe is currently a Pro feature, despite CapCut's broader free editing offering. CapCut

What I'd choose

For 100+ existing videos: OpusClip
For professional editing + batch processing: Premiere Pro
For quick social-media production: CapCut

If by “batch-generating” you mean “I have 500 horizontal videos and want software to automatically produce 500 polished 9:16 files, with the crop following whoever/whatever is important”, I'd lean OpusClip. Its current workflow is much closer to that use case than a traditional editor. Opus

If you tell me roughly how many videos you have, their typical length, and whether they're talking heads / podcasts / sports / product footage / mixed, I can narrow it down to the best workflow and likely cheapest option.

If your main goal is “take a library of existing 16:9 videos → automatically make good-looking 9:16 versions → do it in batches”, I’d rank them:

1. loopdesk.ai — best for true batch processing

• Built around batch reframing rather than being primarily a video editor.
• Can process a whole library and generate speaker-centered vertical versions.
• Particularly attractive if you have dozens/hundreds of existing videos rather than just occasional clips. Loopdesk Pijush Saha
• My pick if batch throughput is your #1 requirement.
• opus.pro — best overall for creators

• Excellent if you want more than resizing: it can identify useful sections, create shorts, add captions, and intelligently reframe them.
• Its AI Reframe supports 9:16, 1:1, and 16:9, and can track faces, objects, speakers, and moving subjects. Opus
• Also has an API if you eventually want to automate the pipeline. Opus
• My pick if you're turning long-form content into social clips at the same time.
• adobe.com — best for professional control

• Auto Reframe tracks the action and creates a vertical sequence, with options for slower/default/faster motion tracking. Adobe Help Center Adobe Help Center
• You retain a proper editable Premiere timeline, which is a big advantage if AI framing needs occasional correction.
• Best if you're already a Premiere editor or the footage is commercially important.
• capcut.com — best cheap/easy option

• Its Auto Reframe converts 16:9 → 9:16 and tracks the subject rather than simply taking a center crop. CapCut
• Very easy, but I'd choose the options above for a large professional content library.

What I'd choose for you

If by “batch-generating” you mean something like:

“I have 500 horizontal videos. Give me a 9:16 version of each, automatically follow the person/product, and let me review/export them without manually keyframing every video.”

I'd start with Loopdesk.

If instead you mean:

“I have 1–2 hour podcasts/interviews and want AI to find the good moments and make those moments vertical.”

I'd use OpusClip.

And if you need maximum control/quality with an editor involved, use Premiere Pro.

One important distinction: smart reframing ≠ AI-generated video expansion. These tools are generally intelligently moving a 9:16 crop around your original 16:9 footage. That's usually what you want for preserving the original footage, but it can struggle when two people are far apart, important graphics sit at the edges, or several subjects compete for attention. Adobe explicitly provides motion-specific tracking controls for this reason. Adobe Help Center

If you tell me roughly how many videos you have, their typical length, and whether they're talking-head / podcasts / products / sports / cinematic footage, I can narrow this to the best 1–2 options for your exact workflow.

If your main job is “take a folder of finished 16:9 videos and automatically make good-looking 9:16 versions”, my pick right now is OpusClip.

My ranking

1. opus.pro — best for batch automation

• Its AI Reframe automatically identifies the important subject and tracks it as the crop moves.
• Crucially for your use case, it explicitly supports batch processing of multiple videos.
• Handles 9:16, 16:9 and 1:1 outputs. Opus Opus
• Best if you want: drop in 20–100 existing videos → get vertical versions with minimal intervention.
• Particularly good for talking-head/interview footage and social repurposing.
• adobe.com — best if quality/control matters more than automation

• Auto Reframe analyzes the action and creates a moving crop that follows the subject.
• You can apply it to an entire sequence, then manually fix anything the AI gets wrong. Adobe Help Center Adobe Help Center
• Better choice if these are valuable client/brand videos where you want to inspect the result and make occasional corrections.
• Less attractive if the goal is truly high-volume unattended batch processing.
• descript.com — best if you're also turning the videos into social clips

• Can convert existing footage to portrait 9:16 while keeping the subject in frame.
• Its workflow is particularly nice if you're also doing transcripts, captions, cutting clips, etc. Descript Descript
• I'd choose it over OpusClip if your workflow is “edit/rewrite the content + make vertical versions,” rather than simply “reformat a library.”

For your specific use case

I'd go:

OpusClip → batch reframe → 9:16 → review only the failures.

That's the sweet spot if you have a large existing library. OpusClip specifically advertises batch cropping/reframing, whereas Premiere's strength is giving you more control over individual results. Opus Adobe Help Center

One caveat: if your horizontal videos contain two or more people, presentations/screenshares, products moving around the frame, or subjects frequently crossing each other, the quality difference becomes much more important. In that case I'd test the same 3–5 representative videos through OpusClip vs. Premiere before committing to a workflow.

If you tell me roughly how many videos you have, their typical length, and whether they're talking heads / podcasts / events / product videos, I can recommend the best setup specifically for your batch.

If your goal is “I already have a bunch of finished 16:9 videos; give me good-looking 9:16 versions with as little manual work as possible,” my pick is Adobe Premiere Pro—especially if these are professionally edited videos and you want control when the AI gets a crop wrong.

My ranking

1. Adobe Premiere Pro — best overall

• Its Auto Reframe can reframe an entire sequence into vertical 9:16 and uses motion tracking/keyframes to keep the important action in frame. Adobe Help Center Adobe Help Center
• You can choose different motion behavior—slower, default, or faster—which matters a lot for interviews vs. sports/action footage. Adobe Help Center
• Crucially, you can batch the workflow across a library while retaining an editable professional timeline, rather than getting a black-box exported video.
• Best for: finished client work, branded videos, lots of existing edits, editors who want to fix the 10% of shots AI gets wrong.
• OpusClip — best for maximum automation

• Its AI Reframe automatically converts videos to 9:16, 16:9, or 1:1, with subject-aware reframing. Opus
• Better choice if you want to throw a pile of videos at something and get social-ready outputs without opening a traditional NLE.
• It is particularly oriented toward repurposing long-form material into social clips, so it's less ideal if you specifically want one faithful 9:16 adaptation of every existing edit rather than automatically finding highlights.
• CapCut — best cheap/easy option

• Its Auto Reframe handles 16:9 → 9:16 and tracks/repositions the visible frame. CapCut
• Very approachable, but I'd expect more manual cleanup on complicated footage, multiple subjects, graphics, or rapid movement.

What I'd choose for your use case

If you have 50–500+ existing horizontal videos: I'd start with Premiere Pro.

The workflow is essentially:

16:9 master → duplicate sequence → Auto Reframe → 9:16 → batch export → spot-check

Adobe specifically supports applying Auto Reframe to a whole sequence and creating a duplicate sequence at the new dimensions. Adobe Help Center

If you mean hundreds/thousands of individual video files where you don't care about preserving the editing timeline, I'd instead investigate an automated/batch-oriented AI service. That's a slightly different requirement from Premiere's “reframe my edited sequences” workflow.

If you tell me roughly how many videos you have, their typical length, and whether they're talking-head/interviews, podcasts, product videos, sports, etc., I can narrow this down to the best batch workflow + estimated cost for your library.

If your main goal is “I have a library of finished 16:9 videos; turn all of them into good-looking 9:16 versions with minimal manual work,” I’d rank them:

1. OpusClip — best overall for batch repurposing

• Its AI Reframe automatically converts videos to 9:16 and tracks the important subject rather than simply doing a center crop. Opus Opus
• Particularly good if you're processing lots of existing videos rather than rebuilding edits from scratch.
• Its business offering is explicitly designed for high-volume workflows; Opus says one media organization generates 500+ brand-friendly clips/day in multiple aspect ratios. Opus
• Bonus: it can also find clips, caption them, and prep them for social—useful if “batch-generating” means more than just reframing.
• Adobe Premiere Pro — best if you already edit professionally

• Auto Reframe can process an entire sequence, creating a duplicate 9:16 sequence and automatically applying tracking to the clips. Adobe Help Center Adobe Help Center
• You get much more control when the AI gets something wrong, including motion presets and keyframe refinement. Adobe Help Center
• I'd choose this over OpusClip if your existing videos already live in Premiere projects and you need broadcast/client-level control.
• CapCut — best inexpensive/easy option

• Its Auto Reframe handles 16:9 → 9:16 and automatically adjusts the framing, with stabilization and camera-movement controls. CapCut
• Very approachable, but I'd expect more manual cleanup on complicated shots or videos with multiple subjects.
• It's better suited to a creator workflow than a serious large-library automation pipeline.

My pick

For your exact use case: OpusClip.

If you've got, say, 50–500 finished horizontal videos and want to produce vertical versions without opening every video in an editor, I'd start there. Its current workflow is much closer to “feed it a library and let AI repurpose it” than traditional editing software. Opus

If you mean “I need the exact same finished videos, just intelligently reframed to 9:16”—with no clipping, rewriting, captions, or other AI edits—then Premiere Pro is probably the better choice.

If you tell me roughly how many videos you have, their typical length, and whether they're talking heads / podcasts / interviews / sports / products / cinematic footage, I can narrow this down to the best workflow and estimate how much manual correction you'd need.

If your main job is “take a folder of existing 16:9 videos and automatically make good-looking 9:16 versions”, my top pick is opus.pro.

My ranking

Why OpusClip: its AI Reframe specifically tracks speakers and moving subjects, supports 9:16, and—importantly for your use case—has batch processing for multiple videos. Opus Opus

It also has different layouts for things like one speaker, two speakers, panels, and screen shares, rather than simply doing a dumb center crop. Opus Clip

If you want maximum control

Go with adobe.com. Its Auto Reframe can automatically create a vertical 9:16 sequence and track the important action, while still letting you manually fix the framing with keyframes. Adobe Help Center Adobe

The tradeoff is that Premiere is more of an editor's tool: excellent if you want the output to remain part of a professional editing workflow, but less “throw 100 videos at it and come back later” than OpusClip.

What I'd choose for your specific workflow

If you have, say, 50–500 existing horizontal videos and want:

16:9 master → AI detects subject → dynamic 9:16 crop → batch render → download

I'd start with OpusClip.

If these are multi-camera interviews/podcasts, I'd especially favor it because active-speaker/speaker-aware reframing is where generic auto-crop tools tend to fall apart. Independent 2026 testing also found OpusClip particularly strong at tracking active speakers in two-person footage. quickreel.io

If you tell me roughly how many videos you have, their typical length, and whether they're talking heads / interviews / sports / product videos / screen recordings, I can narrow this down to the best 2–3 tools and the cheapest workflow for your volume.

If your main goal is “take my existing 16:9 library → generate lots of 9:16 versions with good AI framing” (not necessarily finding viral clips), I’d shortlist these:

QuickReel CapCut## My picks by use case

Best overall for a big existing video archive: Opus Clip

Good if your videos are:

• podcasts
• interviews
• webinars
• talking-head content
• YouTube videos

It can identify clips, reframe them to vertical, and add captions in one workflow. The active-speaker framing is one of its strongest features. QuickReel

Best if you only want reframing (not AI clipping): Adobe Premiere Pro

If you already have edited masters and simply need:

• 100 horizontal videos → 100 vertical versions
• precise brand control
• manual fixes when AI misses

Premiere’s Auto Reframe is still the safest “editor’s tool” because you can override the AI. Pijush Saha

Best for a content team doing volume: Vizard

Useful when you want:

• batch processing
• multiple aspect ratios
• captions
• social-ready exports

It specifically markets speaker/motion tracking for converting horizontal video into vertical formats. Vmaker AI

Best cheap/free-ish option: CapCut

Surprisingly capable for:

• auto captions
• social exports
• quick reframing
• lots of short-form variations

It is less ideal if you need hundreds of consistent, brand-controlled outputs. CapCut

What I’d choose for a batch job

• 100+ existing YouTube/podcast videos: Opus Clip or Vizard
• Already edited videos, just need 9:16 conversions: Premiere Pro
• Agency/social team workflow: Vizard
• Solo creator wanting speed: CapCut
• High-end branded content: Premiere + manual cleanup

One thing to watch: no AI reframer is perfect. The hardest cases are:

• two people talking and switching attention
• people walking across frame
• slides/screenshares
• footage where the important object isn’t a face

For a serious batch run, I’d generate everything automatically, then spot-check about 10–20% before publishing. QuickReel

If you tell me what kind of videos they are (podcasts, courses, weddings, YouTube, interviews, sports, ads, etc.) and roughly how many hours of footage, I can narrow it to the best workflow.

If your main goal is “take a library of finished 16:9 videos and automatically produce good-looking 9:16 versions at scale,” I’d shortlist these:

1. Adobe Premiere Pro — best overall for quality + control

• Its Auto Reframe analyzes the action and generates a 9:16 sequence with motion keyframes that follow the subject.
• You can process an entire sequence rather than manually reframing every clip.
• Crucially, you can fix the occasional bad crop afterward with normal keyframes. Adobe Help Center Adobe Help Center
• Best if: these are valuable videos and you want automated first-pass framing with professional cleanup.
• Opus Clip — best if you're also turning long videos into Shorts

• Particularly attractive for podcasts, interviews, webinars, and other long-form material where you want the software to find clips + reframe them vertically.
• Recent comparisons specifically highlight its active-speaker tracking. QuickReel
• Best if: “make me 10–20 usable Shorts from this long video” is part of the workflow.
• Vmaker AI — best simple browser-based option

• Its Smart Reframe tracks speakers and motion and outputs 9:16 without manual keyframing. Vmaker AI
• Best if: you don't want to install/use a full NLE and want a straightforward automated workflow.
• CapCut — best for a lightweight social-content workflow

• Its auto-resizing workflow can track a speaker/product during movement and create vertical versions, with manual controls for correcting crops. CapCut
• Best if: the output is primarily Reels/TikTok/Shorts and you want quick social editing rather than a traditional post-production environment.

My pick for your specific use case

If you already have finished horizontal videos and want to batch-create vertical masters, I'd choose Premiere Pro. Its Auto Reframe is unusually useful because it creates new vertical sequences from your existing edits, rather than forcing you into an AI clip-generation workflow. You can set the target resolution directly and choose different motion-tracking behavior depending on how much movement is in the footage. Adobe Help Center Adobe Help Center

If you're talking about hundreds/thousands of videos and want essentially “drop in a folder → get 9:16 versions out”, I'd look harder at a batch-first AI service rather than Premiere. There are newer tools specifically targeting that workflow. Pijush Saha

If you tell me roughly how many videos, their typical length, and whether they're talking-head/interviews, product videos, sports, etc., I can recommend the best option specifically for your batch workflow.

For batch-generating 9:16 versions from existing horizontal footage with smart framing, the best choice depends on whether you care most about volume, editing control, or quality of reframing.

My shortlist:

Vmaker AI CapCut Pijush Saha## My recommendations by workflow

1. You have a library of YouTube videos/podcasts and want dozens of Shorts

Pick: Opus Clip

Best if your process is:

• Upload 30–120 minute horizontal videos
• Automatically find interesting sections
• Generate vertical clips
• Add captions
• Export batches

It is less of a "make my exact edit vertical" tool and more of a repurposing engine. Pijush Saha

2. You already have finished videos and only need perfect 16:9 → 9:16 conversions

Pick: Adobe Premiere Pro

Premiere's Auto Reframe is probably the safest professional option:

• Tracks subjects
• Creates keyframed reframing
• Lets an editor fix bad decisions
• Preserves your existing timeline, color, audio, graphics

For ads, documentaries, courses, and client work, this is usually where I'd land. Pijush Saha

3. You need the fastest social-media factory

Pick: CapCut

Good balance:

• Very fast
• Cheap/free entry
• Auto captions
• Templates
• Auto reframing

Great for TikTok/Reels/Shorts teams. It can struggle more with complicated scenes (multiple people, sports, wide action shots). CapCut

4. You want maximum control and don't mind editing

Pick: DaVinci Resolve Studio

Excellent if:

• You already grade in Resolve
• You need cinematic quality
• You want manual correction after AI reframing

If I were building a batch pipeline today

• Podcast/interview content: Opus Clip → review → publish
• Marketing videos/ads: Premiere Pro Auto Reframe → batch export presets
• Creator content: CapCut
• Film-quality footage: Resolve Studio

One thing to watch: no AI reframer is perfect. Talking heads are easy; two-person conversations, sports, presentations with slides, gameplay, and wide shots are where you'll want a review pass. CapCut

If you tell me your source footage type (podcasts, weddings, courses, YouTube videos, ads, sports, etc.) and approximate volume (e.g., 10 videos/month vs 1,000 clips/day), I can narrow this down to one workflow.

If you mean “I have a library of finished 16:9 videos and want to turn them into good-looking 9:16 Reels/Shorts/TikToks automatically, with the crop following the subject”, these are the strongest options:

Best overall for batch jobs: vmaker.com

Best for: uploading lots of videos and getting usable vertical versions quickly.

• AI tracks speakers and motion instead of doing a dumb center crop.
• Handles multiple aspect ratios (9:16, 1:1, 16:9).
• Browser-based, so it is easy for teams or content pipelines.
• Good fit for interviews, webinars, talking-head content, and courses. Vmaker AI

Best if you also want to find clips: opus.pro

Best for: podcasts, interviews, YouTube videos → Shorts.

• Finds highlight moments.
• Auto-crops to vertical.
• Adds captions and social-ready formatting.
• Strong workflow if you are not starting with already-edited short clips. Pijush Saha

Best professional editor workflow: adobe.com

Best for: editors who need control.

• Auto Reframe can track subjects and create vertical sequences.
• You can manually fix bad AI decisions.
• Better when the footage is complex (multiple people, graphics, intentional composition). Pijush Saha

Best for privacy/local processing: editassist.app

Best for: agencies or creators who do not want footage uploaded.

• Batch reframing.
• Subject-aware crops.
• Local processing workflow. EditAssist

Best quick/simple option: capcut.com

Best for: casual social production.

• Easy auto-reframe.
• Good enough for centered subjects.
• Less ideal for complicated scenes or lots of batch processing. CapCut

My pick by use case

One thing to watch: smart reframing quality depends heavily on the footage. A single centered speaker is easy; two-person interviews, sports, screen recordings, and wide cinematic shots are where tools differ most. quickreel.io

If you tell me:

1. approximate number of videos (10 vs 1,000+),
2. average length, and
3. content type (podcast, courses, ads, events, etc.),

I can narrow it to the best workflow.

If your main goal is “take a folder of existing 16:9 videos and efficiently turn them into good-looking 9:16 versions with AI deciding what stays in frame,” my pick is OpusClip.

My ranking

1. opus.pro — best overall for batch repurposing

• Built specifically around video repurposing rather than traditional editing.
• Its AI Reframe automatically converts footage to 9:16, tracks faces/actions/objects, and lets you manually correct the framing afterward. Opus Opus
• Particularly attractive if you have lots of videos and want minimal hands-on work.
• It also has an API, which is interesting if “batch” means hundreds or thousands of files rather than a handful. Opus
• Downside: OpusClip tends to push you toward its broader “find clips + captions + repurpose” workflow, so it's not as editor-centric as Premiere.
• adobe.com — best if you need professional control

• Its Auto Reframe can process an entire sequence, creating a duplicate sequence at the new aspect ratio. Adobe Help Center Adobe Help Center
• You can choose different motion-tracking behavior and manually override the generated path. Adobe Help Center
• Best choice if these are valuable client/commercial videos where you're willing to do a QA pass.
• Downside: more setup and less “throw 100 videos at it and walk away.”
• capcut.com — best inexpensive/easy option

• Auto Reframe handles 16:9 → 9:16 and tracks the main subject. CapCut
• Very approachable and quick.
• Downside: its Auto Reframe is now a Pro feature in many contexts/regions. CapCut

What I'd choose

One important distinction: if you mean “batch convert every existing video while preserving the exact edit, just intelligently changing the camera framing,” rather than “find the best clips from my videos,” I'd lean Premiere Pro or OpusClip's Reframe tool specifically, not a generic AI clip generator.

If you tell me roughly how many videos you have, their typical length, and whether they're talking-head / interviews / sports / product footage / something else, I can recommend the best workflow and tell you which one will produce the fewest bad crops.

If your main job is “take a library of existing 16:9 videos and automatically make good-looking 9:16 versions”, I’d pick OpusClip overall.

My ranking

1. opus.pro — best for batch/scale

• AI Reframe automatically converts to 9:16 and tracks faces, speakers, objects, and moving subjects. Opus Opus
• Particularly good if you're processing lots of existing videos rather than rebuilding edits manually.
• Also has clipping, captions, editing, and publishing tools, so you can go from long horizontal footage to social-ready clips in one workflow. Opus
• My pick if speed and volume matter most.
• adobe.com — best quality/control

• Its Auto Reframe can process an entire sequence, create a vertical version, and generate motion keyframes that follow the action. Adobe Help Center Adobe Help Center
• You can choose slower/default/faster motion tracking and manually override the generated path. Adobe Help Center
• Best if you're already a Premiere editor and want AI to do 80–90% of the work while retaining professional control.
• capcut.com — best cheap/easy option

• Auto Reframe handles different aspect ratios and has subject tracking/stabilization controls. CapCut
• Very approachable for social content.
• One catch: Auto Reframe is currently a Pro feature, rather than part of the free tier. CapCut

What I'd choose for your use case

If you have dozens/hundreds of existing horizontal videos and want to push a button and get vertical deliverables:

OpusClip → first choice

If you have a professional editing workflow and want maximum control over tricky shots:

Premiere Pro → first choice

If you're optimizing for simplicity/cost:

CapCut → first choice

One important distinction: if by “batch-generating” you mean preserving your existing edits exactly and simply intelligently changing the framing, rather than having AI find highlights and make new clips, I'd lean Premiere Pro or OpusClip's AI Reframe specifically, not a generic AI clip generator. OpusClip explicitly supports reframing existing videos without requiring you to turn them into new highlight clips. Opus

If you tell me roughly how many videos you're processing (e.g. 20 vs. 2,000), their typical length, and whether they're interviews, talking-heads, podcasts, sports, presentations, etc., I can narrow this down to the best workflow and estimate how much manual cleanup you'll have.

If your main goal is “take my existing 16:9 library → generate lots of polished 9:16 versions with AI tracking the important stuff”, I’d shortlist these:

1. Opus Clip — best overall for creators with lots of existing footage

Best for: YouTube videos, podcasts, interviews, webinars, talking-head content.

Why it’s strong:

• AI detects interesting sections and reframes them vertically.
• Good active-speaker tracking for interviews/podcasts.
• Batch-style workflow: upload long videos and get multiple Shorts/Reels-style outputs. QuickReel Smooth Clip
• Includes captions and social-ready formatting.

Downside:

• If you only need reframing (not clipping), you may be paying for features you don’t use.

2. Adobe Premiere Pro Auto Reframe — best if you already edit professionally

Best for: Agencies, editors, branded content.

Why it’s strong:

• Lives inside your normal editing workflow.
• Lets you refine AI decisions manually.
• Better when you need exact control over graphics, titles, product shots, and complex edits. Pijush Saha

Downside:

• Less “drop 200 videos in and walk away” than dedicated AI repurposing tools.

3. Vizard AI — best for bulk podcast/webinar repurposing

Best for: Multi-speaker content.

Why it’s strong:

• Built around long-form → short-form workflows.
• Tracks speakers and supports vertical outputs. Vmaker AI

Downside:

• You’ll still want to review crops on complicated shots.

4. CapCut — best budget option

Best for: Social teams and creators who want fast output.

Why it’s strong:

• Smart reframing, captions, templates, and quick social exports in one place. CapCut

Downside:

• Less “editorial intelligence” than tools focused specifically on repurposing.

5. Dedicated batch reframe tools (if you already have the edits)

If your videos are already cut and you only need aspect-ratio conversion, look at tools focused specifically on smart reframing rather than clip generation. Some newer tools emphasize batch 9:16 conversion with subject tracking and consistent framing rules. EditAssist LumiClip

My recommendation by use case

One thing to watch: “smart framing” quality varies hugely. A tool that works beautifully on a single presenter can fail on:

• two people talking across a wide frame
• someone walking around
• screen recordings with important UI elements
• videos with text/lower thirds near the edges

If you tell me:

1. roughly how many hours of footage you need converted,
2. whether it’s podcasts/talking heads/events/products, and
3. whether you need just reframing or automatic clip selection too,

I can narrow it to the best fit.

If your main goal is “I have a library of finished 16:9 videos and want good-looking 9:16 versions with as little manual work as possible,” I’d rank them:

1. OpusClip — best overall for volume

• Its AI Reframe automatically tracks faces, products, and action and converts horizontal footage to 9:16. Opus
• Particularly good if you're also turning long videos into multiple Shorts/Reels/TikToks.
• It now has an API for automated resizing/reframing workflows, which is useful if “batch” means hundreds of videos rather than 10 at a time. Opus
• My pick if you want a mostly hands-off workflow.
• Adobe Premiere Pro — best quality/control

• Auto Reframe can process an entire sequence and create a 9:16 duplicate sequence automatically. Adobe Help Center Adobe Help Center
• You retain full timeline/keyframe control when the AI gets the framing wrong. Adobe
• Best choice if you're already working in Premiere and want AI automation + professional cleanup.
• Downside: it's much less “throw 100 videos at it and walk away” than dedicated AI batch tools.
• CapCut — best cheap/easy option

• Its Auto Reframe is specifically designed to convert 16:9 footage to vertical and dynamically reposition the crop. CapCut
• Great for straightforward talking-head/social content.
• I'd choose it if you're doing relatively small batches and don't need a sophisticated automated pipeline.

For your specific use case

If you mean batch processing an existing archive, rather than creating new short clips from long videos, I'd lean:

OpusClip → best automation
Premiere → best finished quality/control
CapCut → best inexpensive/simple workflow

One caveat: if your videos contain two people, presentations, sports, products moving around, or important graphics at the edges, I'd prioritize the quality of the tracking over raw batch speed. A 9:16 crop throws away a huge amount of the horizontal frame, so bad tracking becomes very obvious. CapCut

If you tell me roughly how many videos you're processing (e.g. 20 vs. 2,000), their typical length, and whether they're talking heads / podcasts / ads / events, I can narrow this down to the best 1–2 options for your workflow. opus.pro

If your main job is “I already have finished 16:9 videos; give me a pile of good-looking 9:16 versions with the crop following the subject”, I’d rank them:

1. opus.pro — best overall

• Excellent fit for turning existing horizontal footage into vertical social clips.
• Its AI Reframe automatically converts to 9:16 and tracks the relevant subject rather than doing a dumb center crop. Opus Opus
• Particularly good if you also want it to find clips automatically, add captions, and produce multiple social-ready cuts.
• It also has an API for automated resizing, which is interesting if “batch” means hundreds of files rather than 10. Opus
• loopdesk.ai — potentially best for pure batch reframing

• If you don't want AI deciding which moments to clip, this is closer to your actual workflow: take existing videos and generate reframed versions.
• Recent comparisons specifically highlight its batch-first approach and ability to generate multiple aspect ratios from a source. Pijush Saha
• I'd test this first if you have a large back catalog and want one 9:16 version of every video, rather than 5–10 Shorts extracted from each.
• Adobe Premiere Pro — best if you need professional control

• Auto Reframe is still one of the strongest options if you're already working in Premiere and don't mind a little setup. Pijush Saha
• Better choice when your footage has complicated compositions, graphics, multiple people, or brand-specific framing and you want to be able to fix the AI result.
• Less attractive if your priority is “throw 200 videos at it and come back later.”
• vizard.ai — good middle ground

• Has auto-reframing and speaker detection, and is oriented toward social repurposing. Tech Times
• I'd choose it over OpusClip if you care more about collaborative/team editing than fully automated clipping.

My recommendation for your exact use case

If you're saying “batch-generate 9:16 versions” rather than “find Shorts from my videos,” I'd start with Loopdesk and OpusClip side-by-side.

The key test isn't the UI—it's how well they handle difficult shots:

• one person moving horizontally across the frame
• two people talking
• person + product/demo
• slides or screen recordings
• text/graphics near the edges
• cuts between different compositions

For a big existing library, I'd favor Loopdesk if its batch automation performs reliably on your footage; for a broader “turn my long-form library into social content” workflow, OpusClip is the safer choice. Recent comparisons specifically distinguish the two along those lines. Pijush Saha

If you tell me roughly how many videos you're processing (e.g. 20 vs. 2,000), their typical length, and whether you want the whole video reframed or multiple Shorts extracted from each, I can narrow it down to the best 2–3 options and compare batch limits, pricing, API/automation, and framing quality.

If your main goal is “take a folder of existing 16:9 videos and automatically make good-looking 9:16 versions with the crop following the subject,” I’d rank them:

1. opus.pro — best overall for batch repurposing

• Its AI Reframe tracks moving speakers/objects and automatically outputs 9:16. Opus Opus
• Particularly good if these are podcasts, interviews, webinars, talking-head videos, or other content where the important subject moves around.
• It can also find clips, add captions, and handle publishing, so it’s more of a repurposing pipeline than just a cropper.
• Current plans include AI reframe; higher tiers add more aspect ratios and moving-object tracking. Opus
• adobe.com — best if you need professional control

• Auto Reframe analyzes motion and creates a vertical 9:16 sequence while keeping the subject in frame. Adobe
• The big advantage is that you can fix the AI's mistakes with normal keyframes afterward.
• Better choice if these are client/commercial videos where you need the final framing to be exact, rather than simply generating hundreds of social versions.
• Loopdesk — worth testing for a large video library

• A recent 2026 comparison specifically highlights it for batch-first reframing, including generating multiple aspect ratios from a source in one operation. Pijush Saha
• I'd test it against OpusClip on your actual footage before committing, since batch workflow is its main appeal.

My pick

For “I have 100 existing horizontal videos and just want good 9:16 versions”: OpusClip.

For “I have 100 videos, but these are valuable enough that I need to be able to correct the AI framing”: Premiere Pro.

One important caveat: if your videos have two or more people, presentations/screenshares, graphics, or subjects moving quickly, test 5–10 representative videos first. That's where smart reframing quality varies substantially between tools; a recent hands-on comparison found the biggest differences with multi-speaker footage rather than static talking heads. quickreel.io

If you tell me roughly how many videos you have, their typical length, and whether they're talking heads/podcasts/events/etc., I can narrow this down to the best batch workflow and likely cost for your library.

If your main goal is “take a library of existing 16:9 videos and automatically make good-looking 9:16 versions with the crop following the important subject,” I’d narrow it to these:

• Best overall for batch repurposing: opus.pro — particularly good if you also want it to identify short clips, add captions, and produce social-ready versions. Its strength is making the whole repurposing workflow automatic rather than just changing the canvas. Independent 2026 testing also found it particularly strong at active-speaker tracking. QuickReel
• Best for a large existing video library: Loopdesk — worth looking at if batch processing is the #1 requirement. It is specifically designed around applying reframing rules across batches and generating multiple aspect ratios. Pijush Saha
• Best if you already edit professionally: adobe.com — Auto Reframe tracks the focal action and can be applied to sequences, with editable keyframes afterward. It's less “upload 200 videos and walk away,” but gives you the most control when the AI gets a shot wrong. Adobe Adobe Blog
• Best browser-based alternative: Vmaker AI — its Smart Reframe tracks both speakers and motion and can convert horizontal footage to 9:16 without manually keyframing the crop. Vmaker AI
• Best if you want local processing: ReClipStudio — it supports batch/watch-folder automation, multiple aspect ratios, and local processing rather than uploading your footage. ReClipStudio

What I'd pick

If you're saying “I have dozens/hundreds of finished horizontal videos and I want vertical copies with as little manual intervention as possible,” I'd start with Loopdesk or OpusClip.

If you're saying “I need the highest-quality automatic framing, but I want to be able to fix the occasional bad crop,” I'd use Premiere Pro.

One important distinction: auto-reframing isn't the same as simply resizing to 1080×1920. The good tools dynamically move the crop window as the speaker/action moves; that's what prevents the classic “person walks out of the vertical frame” problem. Adobe CapCut

If you tell me roughly how many videos you need to process (e.g. 20/month vs. 500/month), their typical length, and whether they're mostly talking heads, podcasts, presentations, or general footage, I can give you a much more specific winner and compare the batch workflow/pricing.

If your goal is specifically “I have a library of finished 16:9 videos; give me 9:16 versions automatically, with the crop following the important person/action”, I’d narrow it to these:

1. opus.pro — best overall for easiest workflow

• Its AI Reframe detects faces/action and dynamically adjusts the crop for 9:16. Opus Opus
• Particularly good for interviews, podcasts, talking heads, sports, and other footage where the subject moves.
• It also supports batch/API workflows if you eventually want to automate a larger library. Opus
• My pick if you don't want to live inside a professional NLE.
• loopdesk.ai — best if “batch” is the priority

• Built around reframing whole batches of existing videos, including prompt-driven instructions like keeping the speaker centered.
• A recent comparison specifically identifies it as a strong choice for reformatting entire libraries. Loopdesk Pijush Saha
• I'd investigate this first if you're talking dozens/hundreds of existing videos, rather than generating individual social clips.
• adobe.com — best quality/control

• Auto Reframe can turn a sequence into Vertical 9:16 and track the subject automatically. Adobe
• You can then manually fix the occasional bad crop with keyframes.
• The downside is that it's much less “throw 200 videos at it and walk away” than dedicated AI batch tools.
• vmaker.com — worth considering for large libraries

• Tracks speakers and motion and supports 9:16, 1:1 and 16:9.
• It explicitly supports reframing videos regardless of length/speaker count and runs in the browser. Vmaker AI
• Recent comparisons also identify Vmaker as one of the tools capable of batch-processing libraries. Pijush Saha

What I'd choose

One important distinction: don't optimize for “resize video.” You want AI auto-reframing / subject tracking. A simple 16:9 → 9:16 crop will eventually chop off somebody's face or important on-screen content; smart reframing moves the crop window as the subject moves. capcut.com Loopdesk

If you tell me roughly how many videos you have, their typical length, and whether they're talking-head/interviews, presentations, sports, products, etc., I can recommend the best one specifically for your batch workflow and estimate the cost.

If your main goal is “take a folder of existing 16:9 videos → automatically make good 9:16 versions with the subject intelligently tracked”, I’d rank them:

🏆 My pick: OpusClip

If you're starting with finished horizontal videos rather than editing projects, I'd use OpusClip. Its workflow is designed around turning existing footage into vertical social content, and its reframing system tracks the relevant subject rather than simply taking the center 9:16 crop. It also now exposes auto-resizing through its API, which is useful if you eventually want to automate a whole library. www.opus.pro

Especially good for: interviews, talking heads, podcasts, presentations, and videos where faces/speakers are the important thing.

🥈 CapCut if you want straightforward batch-ish production

CapCut has a very capable Auto Reframe feature: you choose 9:16 and it dynamically adjusts the crop based on the content, including movement. www.capcut.com

The big advantage is that it's a real editor, so you can quickly correct the occasional bad AI decision. The downside is that Auto Reframe is currently a Pro feature, despite CapCut's general editor having free options. www.capcut.com

🥉 Premiere Pro if quality/control matters more than automation

Adobe Premiere Pro has Auto Reframe, which analyzes the focal point and keeps it visible while converting 16:9 → 9:16. www.adobe.com

I'd choose it if these are valuable client/brand videos where you want an editor to inspect and tweak the AI result. It's less attractive if your requirement is “throw 500 videos at it overnight.”

One important distinction

If by “batch-generating” you mean:

I have 200 finished horizontal videos and want 200 corresponding vertical versions with essentially zero human intervention

I'd specifically investigate OpusClip and Loopdesk, rather than traditional editors. Recent comparisons specifically identify Loopdesk and OpusClip as options geared toward batch/library-scale reframing, whereas Premiere is more oriented toward professional timeline workflows. pijushsaha.com

If you tell me roughly how many videos you have (10 / 100 / 10,000), their typical length, and whether they're talking-head, sports, products, or cinematic footage, I can narrow this down to the best 2–3 options and the cheapest workflow.

If your main requirement is “take a folder of existing 16:9 videos and automatically make good-looking 9:16 versions with the subject intelligently followed,” I’d rank them:

🥇 My pick: OpusClip

OpusClip

For a large library of horizontal videos, OpusClip is probably the closest match. Its AI Reframe automatically detects subjects and maintains the framing while converting to 9:16, and its current API supports batch-style generation of multiple aspect ratios from one source. www.opus.pro

It's particularly good if your videos contain people talking, interviews, podcasts, presentations, or moving subjects. It can use face/motion detection and speaker-aware reframing rather than simply taking the center crop. www.opus.pro

🥈 CapCut if you want simple + cheap

CapCut

CapCut's Auto Reframe is very good for straightforward 16:9 → 9:16 conversion and can track the important subject as the shot moves. www.capcut.com

The catch: Auto Reframe is currently a Pro feature, so don't choose it expecting the old free workflow. www.capcut.com

🥉 Premiere Pro if quality/control matters most

Adobe Premiere Pro

Premiere's Auto Reframe analyzes motion and creates a 9:16 sequence while keeping the focal action visible. You can then manually fix any shots where the AI chose poorly. www.adobe.com

I'd choose this if you're making client work or polished branded content, rather than trying to process hundreds of videos as automatically as possible.

One important distinction

If by “batch-generating” you mean:

“I have 200 finished horizontal videos. Drop them into something, automatically make 200 vertical versions, and export them without me touching each timeline.”

I'd specifically favor OpusClip or an API-driven workflow, rather than Premiere/CapCut. OpusClip's current API is explicitly designed around automated aspect-ratio conversion and can output 9:16, 1:1 and 16:9 from the same source. www.opus.pro

If you tell me roughly how many videos you have, their typical length, and whether they're talking heads / podcasts / sports / product videos / mixed footage, I can narrow this down to the best specific tool + workflow for your library.

If your goal is “I have a folder of finished 16:9 videos and want good-looking 9:16 versions with minimal manual work,” my pick is OpusClip.

My ranking

Why OpusClip: its AI Reframe specifically tracks subjects/speakers and converts footage to 9:16, rather than simply taking the center crop. It also supports batch-oriented content workflows and brand templates. www.opus.pro

For example, if your horizontal video has someone walking from left → right, the crop can follow them. For two-person interviews, active-speaker tracking is particularly important; independent testing in 2026 found OpusClip particularly strong in that scenario, though I'd treat that test as directional rather than definitive. quickreel.io

When I'd choose Premiere instead

If you already use Adobe Premiere Pro, I'd probably stay there. Its Auto Reframe can generate a 9:16 sequence automatically, analyze motion, and then let you manually fix the occasional bad crop with keyframes. www.adobe.com

That's the better choice when your videos contain graphics, products, multiple people, screen recordings, or deliberately composed shots where you need more than “follow the face.”

One important distinction

If by batch-generating you mean:

50 existing horizontal videos → automatically make 50 corresponding 9:16 files, preserving the entire edit

I'd lean OpusClip or Premiere, rather than tools whose main purpose is finding viral clips from long videos. Opus has an explicit AI-reframe/resize workflow for this use case. www.opus.pro

If you tell me what kind of videos these are (podcasts, talking-head YouTube, interviews, courses, product demos, gameplay, etc.) and roughly how many you need to process, I can narrow this down to the best 1–2 options and the cheapest workflow.

If your main goal is “I have a folder of finished 16:9 videos; give me good-looking 9:16 versions automatically”, I’d rank them:

1. OpusClip — best overall for batch repurposing
   • Very strong subject/speaker tracking and automatic reframing.
   • Handles 9:16, 1:1, and 16:9 and can automatically detect the important subject rather than doing a dumb center crop. www.opus.pro
   • Particularly good for talking-heads, interviews, podcasts, webinars, and marketing videos.
   • Also has clipping/captions/repurposing if you eventually want more than just reframing.
   • My pick if you're processing a library of videos.

2. CapCut — best inexpensive/simple option
   • Its Auto Reframe tracks the main subject and converts horizontal footage to 9:16. www.capcut.com
   • Good if you want to batch-process videos but still do occasional manual cleanup.
   • Particularly attractive if you're already using CapCut for captions, effects, etc.
   • I'd put it behind OpusClip for large-scale automated repurposing.

3. Adobe Premiere Pro — best if you need professional control
   • Auto Reframe can generate a vertical 9:16 version of an existing sequence and use motion-adaptive tracking. community.adobe.com
   • Much better when your source edits contain complicated graphics, transitions, keyframes, or brand elements that need precise control.
   • The downside is that it's more of an editor's workflow than a “throw 100 videos into it and let AI handle them” workflow.

For your specific use case

I'd choose OpusClip if the videos are already finished and you basically want:

folder of 16:9 → automatically track faces/subjects → generate 9:16 → export

It's particularly compelling because its reframe system explicitly tracks subjects and other important visual elements rather than simply applying a fixed crop. www.opus.pro

If you're talking about hundreds or thousands of existing videos, there's an even more interesting option: OpusClip has an API for automated resizing/reframing, so you can build a pipeline that processes an entire video library without manually uploading each one. www.opus.pro

If you tell me roughly how many videos you have, their typical length, and whether they're talking-head / product / sports / gameplay / cinematic, I can narrow it down to the best tool and workflow for your specific footage.

If your main goal is “I have a folder of finished 16:9 videos; turn all of them into good-looking 9:16 versions with as little manual keyframing as possible,” I’d shortlist these:

🥇 My pick: OpusClip

OpusClip AI Reframe

Its ReframeAnything system is specifically designed to track the important subject/object and automatically produce 9:16, 16:9, or 1:1 versions. It can handle uploaded files as well as various video sources. www.opus.pro

For batch repurposing an existing library, this is the one I'd test first. It's particularly compelling if your footage is interviews, podcasts, talking heads, presentations, or other content where the “important thing” moves around the horizontal frame.

🥈 Premiere Pro if you're already an Adobe shop

Adobe Premiere Pro Auto Reframe

Premiere's Auto Reframe can operate on an entire sequence rather than just individual clips, automatically creating a new sequence at the target aspect ratio. The current version also lets you specify the target resolution directly. helpx.adobe.comhelpx.adobe.com

That's probably the better choice if you need editable timelines and precise cleanup afterward. You can choose different tracking behavior for slow vs. fast-moving footage. helpx.adobe.comhelpx.adobe.com

🥉 CapCut if speed and simplicity matter

CapCut Auto Reframe

CapCut's Auto Reframe automatically adjusts the crop and follows the subject, with 9:16 among its supported formats. www.capcut.com

The catch: Auto Reframe is currently a Pro feature, despite CapCut's general Auto Reframe page describing a free trial/use in some contexts. www.capcut.com

One important distinction

If by “batch-generating” you mean hundreds of existing videos → hundreds of 9:16 files automatically, rather than “find the best short clips from my long videos,” I'd favor OpusClip or a dedicated API/automation workflow over a traditional NLE.

If you tell me what kind of horizontal videos these are (talking heads, podcasts, sports, product demos, gameplay, weddings, ads, etc.) and roughly how many videos you need to process, I can narrow this down to the best 1–2 options and explain the batch workflow.

If your main goal is “take a folder of existing 16:9 videos → automatically make good 9:16 versions → batch export”, I’d shortlist these:

My recommendation

1. OpusClip — if you want the least manual work.
It is particularly good when the videos are interviews, podcasts, webinars, talking-head content, etc. Its automatic reframing is designed to follow the active speaker, and a recent hands-on comparison found it strongest among the tested tools for multi-speaker tracking. quickreel.iowww.capcut.comreclipstudio.com

2. Ssemble — if “batch” is literally the most important requirement.
Its vertical-video workflow specifically advertises batch processing, dynamic reframing, text-safe cropping, and 1080×1920 output. www.ssemble.com This is the one I'd investigate first if you have, say, 100 existing horizontal videos and want a vertical copy of each rather than turning them into automatically selected Shorts.

3. CapCut Desktop — best cheap/easy option.
CapCut's Auto Reframe handles 16:9 → 9:16 and tracks subjects rather than simply taking a center crop. www.capcut.com It's a particularly good choice if you want to inspect/correct the occasional bad crop without learning a heavyweight editor.

4. Premiere Pro — best if you're already in Adobe.
Premiere's Auto Reframe can operate on an entire sequence, create a duplicate vertical sequence, and lets you specify the target resolution. It also has different tracking modes for slow vs. fast movement. helpx.adobe.com The downside is that it's more of an editor's workflow than a “throw 500 files at it” automation tool.

5. ReClipStudio — worth a look if you don't want uploads.
It runs locally, supports 9:16 reframing, and explicitly supports batch queues/folder watching. reclipstudio.com That's compelling for a big archive or sensitive footage.

One important distinction

If you mean:

“Convert every entire horizontal video to a vertical version while intelligently following whoever/whatever is on screen.”

I'd choose Ssemble or ReClipStudio.

If you mean:

“Analyze my long horizontal videos, find the best moments, make multiple Shorts, and automatically frame them vertically.”

I'd choose OpusClip.

If you tell me roughly how many videos you have, their typical length, and whether they're talking heads/podcasts, sports, product demos, etc., I can narrow it down to the best 1–2 options for your exact workflow.

If your goal is specifically “take a folder of existing 16:9 videos and automatically make good-looking 9:16 versions”, I’d rank them:

🥇 My pick: OpusClip

For your exact use case, OpusClip is probably the best starting point. Its AI Reframe automatically detects and tracks important subjects, including moving speakers/objects, and can output 9:16 without you manually keyframing every shot. www.opus.prohelp.opus.pro

It also supports 9:16, 1:1 and 16:9, dynamic layouts, moving-object tracking, and genre-specific reframing on its higher tiers. www.opus.pro

The important distinction: OpusClip can also find short clips inside long videos, so if you want every existing video converted in its entirety, rather than having AI select highlights, make sure you're using its AI Reframe/layout workflow, not primarily its clip-generation workflow.

🥈 Premiere Pro if you want maximum control

If these are valuable master videos and you care about the output looking exactly right, I'd use Premiere.

Its current Auto Reframe can reframe an entire sequence, automatically create a duplicate sequence at the new dimensions, and let you specify the target resolution. helpx.adobe.com

That's particularly attractive if your workflow is:

16:9 masters → duplicate sequence → 9:16 Auto Reframe → quick human QC → export

You get much better control when the AI makes a bad decision, at the cost of more setup.

🥉 CapCut if speed/cost matters

CapCut's Auto Reframe is surprisingly capable and specifically handles converting 16:9 → 9:16 with AI tracking. www.capcut.com

I'd choose it over Premiere if you're producing lots of social content and don't need a traditional professional editing environment. One caveat: Auto Reframe is currently a Pro feature, despite CapCut's general free tier. www.capcut.com

One important caveat

No AI reframer is perfect for two people, groups, presentations with graphics, or subjects moving across a wide frame. A vertical crop throws away a huge amount of the original horizontal image, so those are the cases where you'll want a QC pass. OpusClip, for example, offers manual reframing specifically for correcting its automatic crop. www.opus.prohelp.opus.pro

If you tell me roughly how many videos you're processing (e.g. 20/month vs. 1,000/month), their typical length, and whether they're talking-head/interviews, podcasts, events, gameplay, etc., I can recommend the best workflow—including the most efficient way to batch it rather than doing them one at a time.

If your main goal is “take a folder of finished 16:9 videos and automatically make good-looking 9:16 versions”, I’d pick OpusClip first.

My ranking

Why OpusClip: its ReframeAnything system specifically tracks moving speakers/objects and keeps the important subject in frame, rather than simply doing a center crop. It supports 9:16 output and is designed around repurposing existing videos. www.opus.pro

If you already live in Premiere: use Premiere's Auto Reframe. It can reframe an entire sequence and lets you specify the target resolution, and its motion-tracking modes can be tuned for slow vs. fast-moving footage. helpx.adobe.com It's probably the better choice if you want an editor to quickly fix the 5–10% of shots where AI gets the crop wrong.

CapCut is a strong option if you're primarily making TikToks/Reels/Shorts. Its auto-reframe workflow tracks faces/key objects and can generate 9:16 versions, but I'd expect more manual checking on complicated multi-person footage. www.capcut.com

Bottom line:

• Hundreds of existing videos → OpusClip
• Already edited in Premiere → Premiere Auto Reframe
• Simple social content + low cost → CapCut
• Marketing team/collaboration → Kapwing

If you tell me roughly how many videos you need to process (e.g. 20, 500, 10,000) and whether they're interviews, podcasts, ads, webinars, or general footage, I can narrow it down to the best workflow and pricing tier.

If your main goal is “I have a folder of horizontal videos; turn them into good-looking 9:16 versions automatically”, my pick is OpusClip.

My ranking

1. OpusClip — best overall for your use case
Its AI Reframe specifically tracks moving speakers/objects and automatically creates 9:16 versions; you can also manually correct the framing afterward. It supports different video genres and has an API, which makes it particularly attractive if “batch” means lots of videos rather than just a few. www.opus.prowww.opus.pro

OpusClip

2. CapCut — best value / easiest
CapCut's Auto Reframe converts 16:9 → 9:16 and tracks the main subject. It's a good choice if you want to do reframing plus captions, effects, music, etc. in the same editor. Auto Reframe is currently a Pro feature, despite CapCut also advertising the broader tool as available for free in some contexts/regions. www.capcut.com

CapCut

3. Premiere Pro — best if you're already an Adobe user
Auto Reframe intelligently changes the aspect ratio and keeps the subject centered, with keyframes available for correcting shots that the automation gets wrong. It's much more of a traditional professional editing workflow than OpusClip. www.adobe.com

Adobe Premiere Pro

The important distinction

If you're just resizing existing finished videos, I'd choose OpusClip.

If you're editing the videos anyway, I'd choose CapCut or Premiere.

If you have something like 500 horizontal videos and want to automatically produce 500 vertical versions, I'd specifically investigate OpusClip's API/batch workflow rather than a conventional editor. Its API supports automatic resizing to 9:16, 16:9 and 1:1. www.opus.prowww.opus.pro

If you tell me roughly how many videos you need to process, their typical length, and whether they're talking-head / podcast / product / sports / gameplay, I can narrow this down to the best option and workflow.

If your main goal is “take a folder of existing 16:9 videos and intelligently turn them into 9:16 without manually keyframing every shot,” I’d shortlist these:

🥇 I'd pick OpusClip

For your specific use case, OpusClip is probably the strongest fit. Its AI Reframe automatically converts footage to 9:16 and tracks speakers, moving objects, and important visual elements rather than simply taking the center crop. It also supports 9:16/1:1/16:9 outputs and has workflow features aimed at processing lots of content. www.opus.pro

An independent 2026 comparison also found OpusClip strongest among the tested tools for active-speaker tracking and face framing, though that was a single test rather than a universal benchmark. quickreel.io

Especially good if your videos are:

• interviews/podcasts
• talking-head videos
• webinars
• presentations
• product demos
• videos where the subject moves around the horizontal frame

Try OpusClip's AI Reframe

🥈 CapCut if you're optimizing for volume + simplicity

CapCut's auto-reframing is designed specifically for converting 16:9 footage to 9:16, and its broader long-video workflow can generate multiple vertical clips in a batch. www.capcut.com

I'd choose CapCut over OpusClip if you're already using CapCut and want a cheap, relatively straightforward production pipeline rather than a dedicated repurposing platform.

🥉 Premiere if you need the AI and professional control

Premiere's Auto Reframe can automatically reframe an entire sequence, not just individual clips, and you can specify the target resolution. helpx.adobe.com

The advantage is what happens when the AI gets something wrong: you can directly adjust the generated position/scale/keyframes. Adobe even provides different tracking modes for slow versus fast-moving footage. helpx.adobe.com

So:

100+ videos → OpusClip
Social-first editing → CapCut
You already live in Premiere → Premiere Auto Reframe
Need maximum automation with minimal editing → OpusClip

One important distinction: if by “batch-generating” you mean “I have 500 finished horizontal MP4s in a folder and want software to automatically produce 500 corresponding 9:16 MP4s, preserving each video's entire duration”, rather than “find clips/highlights from my long videos,” tell me that. That changes my recommendation, because I'd prioritize a batch-processing/API workflow rather than a video-to-shorts platform.

If your main job is “take a folder of 16:9 videos and automatically make good-looking 9:16 versions”, my pick is OpusClip.

My ranking

1. OpusClip — best overall

Its AI Reframe automatically detects important subjects, tracks speakers/moving objects, and converts horizontal footage to 9:16. More importantly for your use case, it supports batch processing, so you're not manually setting up every video. www.opus.pro

OpusClip AI Reframe

For interviews/podcasts with people moving around or multiple speakers, this is the one I'd test first. A recent independent comparison also found OpusClip particularly strong at active-speaker tracking. www.opus.proquickreel.iohelp.descript.com

2. Adobe Premiere Pro — best if you're already in Adobe

Premiere's Auto Reframe is designed specifically to turn 16:9 footage into vertical formats while tracking subjects, and you retain much more ability to manually fix bad crops afterward. www.adobe.com

Adobe Premiere Pro

I'd choose this over OpusClip if you have a professional editing pipeline and need precise, repeatable control rather than maximum automation.

3. Descript — best if you're doing content repurposing

Descript can create multiple clips, apply portrait 9:16 layouts, and publish multiple compositions together. It also lets you build reusable custom layout packs, which is useful if every vertical needs the same branding, captions, logo placement, etc. help.descript.com

Descript

What I'd use

If you mean hundreds of existing horizontal videos → automatically framed vertical files with minimal human intervention, I'd go:

OpusClip → batch upload → AI Reframe → 9:16 → review exceptions → export.

If you tell me roughly how many videos you're converting, their typical content (talking heads / podcasts / sports / product demos / cinematic), and whether you need to preserve the entire video or also automatically make shorter clips, I can narrow it down to the best workflow and plan.

If your goal is specifically “take a folder of existing 16:9 videos and efficiently make good 9:16 versions with AI deciding what stays in frame,” I’d narrow it to three:

🥇 Best overall: CapCut

CapCut

Best if you want speed and volume. Its Auto Reframe analyzes the footage, chooses the important subject, and dynamically adjusts the crop for 9:16. It also has stabilization and camera-movement controls. www.capcut.com

The big advantage is that it feels designed around social repurposing, rather than traditional editing. The catch: Auto Reframe is currently a Pro feature. www.capcut.com

🥈 Best professional option: Adobe Premiere Pro

Adobe Premiere Pro

If you're already editing in Premiere, I'd use Auto Reframe rather than moving your workflow elsewhere. Adobe's system identifies the focal point and keeps it visible as you change from 16:9 to 9:16. www.adobe.com

Best for: professional footage, complex timelines, brand consistency, and situations where you want to manually fix AI decisions afterward.

🥉 Best if you also want AI to find the clips: OpusClip

OpusClip

This is different from simply batch-reframing. OpusClip is built around taking longer videos and finding potentially useful short clips, then reframing them vertically. www.opus.pro

So if your workflow is:

1-hour horizontal video → automatically find 10 good moments → turn them into 10 vertical shorts

I'd pick OpusClip.

If it's:

50 finished horizontal videos → make a 9:16 version of each one

I'd pick CapCut or Premiere.

My recommendation

One important caveat: “smart framing” isn't equally good on every type of footage. A single presenter is easy; two people talking, subjects crossing the frame, products moving around, or wide shots with important information at the edges can fool the tracker. Even CapCut recommends reviewing the crop when there are multiple focal points or fast movement. www.opus.prowww.capcut.com

If you tell me what kind of videos you're converting (podcasts, interviews, talking-head YouTube, real estate, sports, product videos, etc.) and roughly how many videos/minutes per month, I can tell you which one I'd actually buy and what the fastest batch workflow would be.

If your main goal is “take a folder of existing 16:9 videos → automatically make good 9:16 versions → export them in bulk,” my top pick right now is OpusClip.

My ranking

1. OpusClip — best for your use case.
Its AI Reframe automatically tracks speakers and moving subjects, supports 9:16, and—importantly for your question—OpusClip explicitly supports batch processing. www.opus.prowww.opus.pro It also has an API if you're talking about hundreds/thousands of videos and want to automate the pipeline. www.opus.pro

I'd choose this if you want something like:

videos/ → upload a batch → AI finds the important subject → generates 9:16 versions → download/export

2. Adobe Premiere Pro — best quality/control.
Premiere's Auto Reframe analyzes motion and creates a vertical 9:16 sequence, while still letting you manually fix the framing afterward. www.adobe.com This is the one I'd use if the videos are professionally produced and you care about preserving exact cuts, graphics, color, audio, etc.

3. CapCut — best inexpensive/easy choice.
Its Auto Reframe handles 16:9 → 9:16 and can track the main subject, with stabilization and camera-movement controls. www.capcut.com The catch is that Auto Reframe is currently a Pro feature. www.opus.prowww.capcut.comwww.opus.pro

What I'd actually pick

• 10–100+ existing videos: OpusClip
• You already edit in Premiere: Premiere Pro
• Social-first content and lowest learning curve: CapCut
• Hundreds/thousands + fully automated pipeline: OpusClip API

One important distinction: if you mean “make a vertical copy of every entire video”, rather than “find the best clips from my long videos,” I'd specifically configure OpusClip for AI Reframe rather than its clip-generation workflow. Its Reframe tool is designed for exactly that aspect-ratio conversion and supports batch processing. www.opus.prowww.opus.pro

If you tell me roughly how many videos you have, their typical length, and whether they're talking heads / interviews / sports / products / etc., I can narrow this down to the best workflow and cheapest option.