Video & Audio

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Supported File Formats

CoLoop supports a range of different video and audio formats. The following table outlines the list of support file types, click the dropdown to view:

Supported File Formats

Supported audio file types	Supported video file types
.3ga	.webm
.8svx	.mts, .m2ts, .ts
.aac	.mov
.ac3	.mp2
.aif	.mp4, .m4p (with DRM), .m4v
.aiff	.mxf
.alac	.mkv
.amr
.ape
.au
.dss
.flac
.flv
.m4a
.m4b
.m4p
.m4r
.mp3
.mpga
.ogg, .oga, .mogg
.opus
.qcp
.tta
.voc
.wav
.wma
.wv

We strongly recommend uploading audio or video files when possible to guarantee reliable format and quality. Transcription quality is dependent on audio, but uploading videos make it easier to see nuances, create clips, and are also important if you are concept testing with a deck.

• There is a limit of 5 GB per audio file - you can cut your files into multiple parts or compress the file.
• There is a limit of **8 GB per video file **- use lower resolution video to speed up transcription time and if it is not imperative to the project.
• Once your file(s) has finished uploading press “Complete” and provide additional information to finish transcribing. See how to create transcripts here.

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Best practices for recording audio and video

When recording audio and video it’s important to ensure the following:

• Speakers are clearly audible: Use high quality, ideally directional microphones and position them in front of the people speaking.
• One interview per file: Make sure there is one interview per audio / video file. If you have multiple combined you should cut them into individual interviews before uploading to CoLoop.

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Zoom, Teams, Google Meet Integration

• You can now directly invite CoLoop Recorder to join your calls conducted over Zoom, Teams and Google Meets.
• This allows you to add CoLoop directly to your meeting tool and stream audio directly back to the platform after the call concludes.
• This allows us to make use of the implied audio channels and identify all speakers with near perfect accuracy.
• For guidance, please refer to this document here.

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Supported Languages and Accents

CoLoop supports near-human accurate transcription from Audio and Video in a range of accents and formats. View our full list of supported languages for transcription here.

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Translating your file post transcription

CoLoop offers translation options for any non-English transcript! All of your analysis and quotes will be in English.

• In order to translate your transcript into English, open a transcript, click on the three dots next to the file name, and press ‘Translate transcript.’
• If you’d like to get the transcript back to the original language simply click on ‘Reset transcript’.
• You can also bulk select transcripts from the Files tab and press ‘Translate’ at the top of screen.

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Simultaneous Translation

SimTran recordings can be difficult to work with as they contain only one speaker. Information about who is speaking and their role in the conversation is lost and has to be inferred by CoLoop based on the context. If you are conducting Non-English language studies we recommend:

• Transcribing and analysing in the native language if possible
• Asking your SimTrans service to provide transcripts with labelled speakers in this format
• Labelling the single speaker in a SimTran transcript as Moderator / Participant (translated) and the role to Participant (see below).

You might notice some superficial errors or red highlighted words in your transcripts. You can correct errors or edit transcripts as needed by following this guide.

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Video Redaction

Video redaction permanently blurs a video to remove faces or other sensitive visual content. The unblurred original is deleted after redaction — the blurred version becomes the only copy. Transcripts and audio are not affected.

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Redact an entire video

1. Open a video file from the Files tab.
2. Click the actions menu (three dots) next to the file title.
3. Select Redact video.
4. Select Entire video and click Redact permanently.

The file shows Redacting video while processing. A 10-minute video takes around 30 seconds; longer videos may take several minutes. Once complete, the video player shows the blurred version and the Redact video option is removed from the menu.

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Redact specific regions

To blur only part of the frame — for example, one participant in a group call:

1. Select Redact video from the actions menu.
2. Choose Only regions I draw on the video.
3. Click and drag on the video preview to draw red rectangles over the areas to blur. Hover a region to reposition or remove it. Use the playback controls to verify placement.
4. Click Redact permanently. The drawn regions are blurred for the full duration of the video. Areas outside the regions remain unchanged.

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Clips and reels from redacted videos

Clips and reels created before a redaction were cut from the unblurred video, so CoLoop withholds them until they have been rebuilt from the blurred version.

• Clips are re-rendered from the blurred video automatically. They cannot be played or downloaded until that finishes.
• Reels containing those clips are marked out of date and must be exported again. You cannot export or download a reel while any of its source videos is being redacted.

If a reel is shared publicly, its link stops working while the redaction runs and stays paused afterwards until you export the reel again — at which point the same link resumes, now serving the redacted version. The reel shows a Public (paused) badge in the clip library while this is the case. To revoke a link instead of letting it resume, select Stop sharing reel from the reel’s menu. See How to share a reel. To blur a reel without redacting the source video, open the Reel Editor and toggle Blur video in the header to export a blurred version of the reel.

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Coming soon

• Automatic face detection — automatically detect and blur faces without drawing regions manually.
• Organization-wide redaction policy — enforce automatic redaction on all uploaded videos across your organization.

Interested in early access? Reach out to support@coloop.ai.