Vizard's API takes a lang parameter. One value, not a list, and it describes the language already in your audio rather than the language you want out.
There is no second parameter. Nowhere in the request body is there a field for a target language, which means there is no call you can make that returns your clip captioned in Spanish and Hindi and Portuguese. You submit the source again, once per language, and the meter runs each time.
Every tool in this comparison is built the same way, so the parameter is worth checking before the feature list.
TL;DR
Five AI clipping tools, compared on how many caption languages one job returns and what the second one costs.
For teams publishing the same clip to audiences that read different languages, the FastPix AI Video Clipping Agent is the strongest of the five.
One language per job, and the source charged again for the next one
Vizard's lang is a single string and it sets the source. OpusClip's sourceLang is a single string and it also sets the source, with no target field anywhere in the schema. Klap does publish a separate translate_to, which is the most honest design here, and it is still one string. Submagic's language is required at project creation and the update endpoint has no language field at all, so an existing project's caption language cannot be changed after the fact.
One language in, one language out, one job at a time.
Vizard and OpusClip both bill one credit per minute of source, per project, so a sixty-minute episode captioned into three languages is a hundred and eighty credits rather than sixty. Klap charges a fresh $0.44 video-input operation for each one. Submagic spends another slot from a monthly quota measured in whole videos.
FastPix takes caption_languages as an array on the clipping call, and In-Video AI renders each language at compose time.
What we compared, and why
Caption languages: because the parameter shape decides whether a multilingual workflow is one call or four. Language coverage: because a translation list is an output, and it cannot rescue audio the tool could not read. Max source duration: because a full episode is inadmissible on more plans than you would expect. Audio-only input: because plenty of shows have no camera, and one of these refuses them outright. Metering: because credits charged on source length behave very differently from credits charged on what you publish. Output: because a downloaded file still has to be uploaded somewhere before anyone can watch it.
Every figure below was checked on 10 September 2026 against each vendor's own API reference, help centre or pricing page. They change often, so check the current page before you rely on a number.
Quick comparison
| FastPix | Vizard | OpusClip | Klap | Submagic | |
|---|---|---|---|---|---|
| Caption languages | Several, as an array | One | One | One | One |
| Target language | `caption_languages` | None published | None in the API | `translate_to`, one value | None after creation |
| Cost per extra language | Nothing extra | The source charged again | The source charged again | A new $0.44 operation | Another upload slot |
| Translation coverage | 50+ caption languages | 128, none from the API | English only | 52 | Published as 48+ and 100+ |
| Indic language support | Supported | Hindi and Tamil | None on any plan | Hindi, Kannada, Marathi, Tamil, Urdu | Hindi, Marathi, Tamil |
| Max source duration | No limit | 60 min free, 600 min paid | 10 hours | Four figures published at once | 2, 5 or 30 min by plan |
| Metering | Minutes of source clipped | 1 credit per source minute | 1 credit per minute imported | Per operation | Whole videos per month |
| Audio-only input | Accepted | Contradicts itself three ways | Video sources only in its docs | Refused outright | MP4 and MOV only |
| Aspect ratios | 9:16, 1:1, 4:5, 16:9 in parallel | Four, one per request | 9:16 until Pro, no 4:5 | 9:16, 1:1, 16:9 | 9:16, 16:9, 1:1, 4:5 |
| Export resolution | Up to 4K | 720p free, 4K on paid | 4K held for Business | 4K on Pro and above | 1080p, 2K, 4K by plan |
| Live clipping | Yes, mid-broadcast | No | No | No | No |
| Output | A downloadable and streamable media asset | A downloadable file | Two MP4 download links | A downloadable file | A downloadable file |
FastPix AI Video Clipping Agent
The AI Video Clipping Agent turns a long recording into ranked, captioned clips, and the caption language is a list rather than a setting. Pass caption_languages on the clipping call and In-Video AI renders each one at compose time, from the same index built once for the asset. The clip is composed once. The captions are composed per language.
The agent detects the spoken language from the audio rather than asking you to declare it. A recording that opens in one language and moves into another comes back captioned in the right script for each stretch.
| What it does | Finds the strongest moments, scores each on five signals, reframes to follow the active speaker, and renders every aspect ratio in parallel with your brand template applied. |
| Who it's for | Teams publishing one recording to audiences that read different languages, and product teams putting clipping inside their own app rather than sending creators to someone else's. |
| Caption languages | Several. `caption_languages` takes an array |
| Language coverage | 50+ caption languages. Detected from the audio, declaring it is optional |
| Max source duration | No limit |
| Metering | Per minute of source clipped, bundled with VOD, Live and In-Video AI |
| Audio-only input | Video or audio file accepted |
| Multi-speaker handling | Reframes to follow the active speaker |
| Aspect ratios | 9:16, 1:1, 4:5 and 16:9, rendered in parallel |
| Export resolution | Up to 4K |
| Live clipping | `fp.live.clip()` during a broadcast, not only after it |
| API access | Full platform API, and clipping runs on the same stack as encoding and delivery |
| Output | A downloadable media asset with a media ID and playback ID |
Every tool below clips a finished upload. FastPix also clips mid-broadcast from a producer cut, so a moment reaches social while people are still watching rather than the next morning.
If your audience reads more than one language, or you want the clip live on your own page rather than sitting in a downloads folder, it is the one worth trying first. The setup guide covers genre, clip length and caption presets.
Vizard
Vizard clips long video into ranked shorts, with a credit ladder that runs from 600 to 6,200 credits a month.
| Caption languages | One. No target-language parameter is published |
| Language coverage | 40 transcription languages in the help centre, 36 in the API docs, "30+" on the API page |
| Indic language support | Two: Hindi and Tamil |
| Max source duration | 60 minutes on free, 600 minutes on paid |
| Metering | 1 credit per minute of video processed, on source length |
| Audio-only input | A help article states audio uploads are not supported; a newer one lists MP3, WAV and M4A |
| Multi-speaker handling | Weakest published position of the five |
| Aspect ratios | 9:16, 1:1, 4:5, 16:9, one format per request |
| Export resolution | 720p on free with a 10-minute export cap, 4K on paid |
| Media retention | 3 days on free. Over-quota Creator projects expire in 28 days |
| API access | Included in paid plans, using the same upload minutes |
| Output | A downloadable file |
Limitations
- The subtitle translation list runs to 128 languages while transcription runs to 40, so a language can be a target and not a source
- AI Enhance is billed per second on top of the per-minute credit. A 60-second clip enhanced at 4K costs 120 credits, twice the entire free monthly allowance
- Credits roll over but expire after 60 days on monthly billing, and unused credits are forfeited when you upgrade from Creator to Business
- The pricing page caps uploads at 30GB while the API docs say 10GB
- Seats are Business only. On free and Creator you cannot add a collaborator at any price
Where the second language costs a second project on Vizard, it costs another entry in an array on FastPix.
OpusClip
OpusClip cuts long video into ranked vertical clips for short-form feeds.
| Caption languages | One, and the app's translate target is English |
| Language coverage | 25 published. No Indic language, and no Arabic, Hebrew, Persian or Urdu |
| Max source duration | 10 hours |
| Metering | 1 credit per minute imported. Free 60, Starter $15 for 150, Pro $29 for 300 |
| Audio-only input | Help centre and API list video sources only; a marketing page claims MP3 and WAV |
| Multi-speaker handling | Split layout works only if both speakers share the original frame |
| Aspect ratios | 9:16 only until Pro, and no 4:5 on any plan |
| Export resolution | 1080p, with 4K held for Business |
| Media retention | Free media expires after 3 days, Starter after 30 |
| API access | Video editing and scheduler API, only from Pro |
| Output | Two MP4 download links |
Limitations
- Its own help centre says "OpusClip does not support Hindi at this time", and separately rules out Arabic, Hebrew, Persian and Kurdish
- The Translate To setting targets English and nothing else, so a non-English episode can reach an English audience and no other
- Credits are charged on minutes imported rather than clips published, so a 90-minute episode costs 90 credits whether you publish eight clips or none
- A weekly 90-minute show is roughly 390 source minutes a month, against 300 credits on Pro
FastPix renders the languages your audience reads, rather than the one language the translator happens to target.
Klap
Klap generates shorts through an API billed per operation rather than per minute.
| Caption languages | One. `translate_to` is published separately, and takes a single value |
| Language coverage | 52 named on the site, "over 100" on the API page |
| Indic language support | Hindi, Kannada, Marathi, Tamil and Urdu |
| Max source duration | 45min, 2h or 3h by plan on the blog. 4 hours on two tool pages. 5 hours in the API docs. No limit on the pricing page |
| Metering | Per operation. $0.44 video input, $0.32 generate short, $0.48 export |
| Audio-only input | Refused, with two other products named instead |
| Multi-speaker handling | Split, three-screen, four-screen, picture-in-picture and multi-track |
| Aspect ratios | 9:16, 1:1, 16:9 |
| Export resolution | HD on Basic, 4K on Pro and above |
| Media retention | Not published. Deletion is on request, within 30 days |
| API access | Public REST API, billed separately from the clip plans |
| Output | A downloadable file |
Limitations
- Four different maximum durations are published at once across the blog, two tool pages, the API docs and the pricing page
- The pricing page names no duration limit, no resolution and no 4K tier, so the plan you buy does not describe what you get
- Audio-only files are refused outright, which rules out any show recorded without a camera
- Each additional caption language is a new video-input operation at $0.44 before any clip is generated or exported
Klap publishes split, three-screen, four-screen and picture-in-picture layouts, and ships one caption language per call.
Submagic
Submagic is caption-led, metering by the number of videos you upload each month rather than by their length.
| Caption languages | One, fixed at project creation and not changeable afterwards |
| Language coverage | 123 in the page title, "50+" in the hero badge, about 46 actually enumerated |
| Indic language support | Hindi, Marathi and Tamil |
| Max source duration | 2 minutes on Starter, 5 on Professional, 30 on Business. The API says a flat 2 hours |
| Metering | 15, 40 or 100 uploads a month by plan, plus a separate API minutes quota |
| Audio-only input | The API upload endpoint lists MP4 and MOV only |
| Multi-speaker handling | Manual side-by-side compositing, not automatic speaker switching |
| Aspect ratios | 9:16, 16:9, 1:1, 4:5 |
| Export resolution | 1080p on Starter, 2K on Professional, 4K on Business |
| Media retention | Not published |
| API access | Public API at docs.submagic.co |
| Output | A downloadable file |
Limitations
- The web app caps each video at 2, 5 or 30 minutes depending on plan, so a full episode is inadmissible on every self-serve tier
- The API says 2 hours flat, which does not match any of the three app limits
- The translation page says "48+ languages" in its hero and "100+" in its own title and body copy
- The update endpoint has no language field, so changing the caption language means starting a new project against the monthly quota
Uploading the same episode a second time costs a slot on Submagic. On FastPix it costs one more entry in caption_languages.
How to choose a clipping tool for multilingual video
Does the same clip need captions in more than one language? Four of the five take one target per job, so every extra language means submitting the source again and paying for it again.
Does the source change language partway through? A single-value language parameter has no way to represent it, and none of the four documents one.
Is the show audio-only? Klap refuses audio files outright, and Submagic's upload endpoint takes MP4 and MOV only.
Is a full episode going in? Submagic caps each video at 2, 5 or 30 minutes depending on plan, so the episode never reaches the clipper.
Start clipping in every language your audience reads
All five will clip an English video into vertical shorts. Four of them take a single target language per job and bill the source again for the next one.
On a recording that is not monolingual to begin with, a single-value language parameter has no way to represent what was actually said.
So try it on the recording you gave up on. Create an account, open AI Agents, pick the clipping agent, and pass the languages your audience actually reads. Ours came back captioned in each of them from one call.
Frequently Asked Questions (FAQs)
What is the best Vizard alternative?
It depends on how many languages your audience reads. Vizard, OpusClip, Klap and Submagic all take one target language per job, so a second language means submitting the source again. The FastPix AI Video Clipping Agent takes caption_languages as an array, so one call returns the same clip captioned in several languages.
Can Vizard caption a video in more than one language at once?
No. Vizard's API has no target-language parameter. The lang field sets the spoken language of the source and takes one value. A second caption language means a second project, and Vizard charges one credit per minute of video processed on each project, so the full source length is charged again.
Which AI clipping tools support Indic languages?
Very few support Indic languages as a source language. Vizard transcribes from Hindi and Tamil. Submagic names Hindi, Marathi and Tamil. Klap names Hindi, Kannada, Marathi, Tamil and Urdu. OpusClip supports none and rules out Hindi in its own help center. Translation lists are much longer than transcription lists, but translation cannot help if the audio was never transcribed correctly.
Do AI clipping tools accept audio-only podcast files?
Klap refuses audio-only files outright and points to other products instead. Submagic's API lists MP4 and MOV only. Vizard contradicts itself, with a help article stating that audio uploads are not supported while a newer article lists MP3, WAV and M4A. FastPix accepts a video or an audio file in the upload step.
How long a video can these clipping tools accept?
Submagic caps each video at 2 minutes on Starter, 5 minutes on Professional and 30 minutes on Business, so a full episode is inadmissible on every web-app plan. Vizard rejects anything over 60 minutes on free and accepts 600 minutes on paid. Klap publishes four different figures across its blog, tool pages, API docs and pricing page. FastPix takes the episode whole.
