AV1 · MP4 / WebM / MKV · 10 h per file

Transcribe a long AV1 video file the talk inside a modern codec.

Packs start at $4 for 300 minutes, and credits never expire. A 1080p AV1 file is often 0.5 to 2 GB an hour, so a long one can pass the 5 GB line; then extract the audio track, which is a few dozen megabytes an hour.

Packs from $4, credits never expire · then from $0.32/hour · Credits never expire · Never used to train AI

✓10 hours or 5 GB per file · ✓About 8 minutes for 4 hours · ✓A free preview of the opening minutes · ✓Packs from $4

AV1 and the transcript

The transcript only needs the soundtrack. AV1 is about the picture, so the real question is the file around it.

Where long AV1 files come from

AV1 is the royalty-free video codec that newer screen recorders, streaming software and some phones and cameras can encode, and that video sites deliver to modern browsers. A long AV1 file is usually a stream recording, a screen capture of a training session, or a downloaded talk, wrapped in MP4, WebM or MKV.

Gigabytes per hour

AV1 compresses well, but the bitrate is set by whoever recorded it. A 1080p screen recording at around 2 to 4 Mbps is roughly 0.9 to 1.8 GB an hour; 4K can be several times that. The audio inside, usually Opus or AAC, is a small part of the total.

Uploading, or sending the sound

An AV1 MP4 or WebM can go up as it is. The box on this page takes up to 500 MB, and a larger file continues on the upload page, up to 5 GB with or without a pack. If the upload refuses the file or it is too big, convert to MP3 or MP4 with ffmpeg or VLC; ffmpeg -i talk.mkv -vn -b:a 96k talk.mp3 keeps only the sound.

Links instead of files

If the AV1 video is already on YouTube, Vimeo, Twitch or Kick, or in a Google Drive share, paste the link instead of downloading it; there is no upload at all. Stream recordings over 6 hours start once a pack is on the account.

Long video, the hard way

Video files grow faster than the patience it takes to watch them back.

✗ A file too large to share

Hours of AV1 video hit upload caps, and playback on older machines stutters.

Players that cannot decode AV1
Uploads that time out after an hour
Re-encoding the whole video for no reason
Scrubbing for the one explanation
Captions typed line by line
Notes that never match the timeline

✓ Sound in, text out

Upload the video, the extracted audio, or a link; the whole session comes back as text.

Four hours in about 8 minutes
Chapters with timestamps
SRT and VTT captions
Questions the session answers
A chat over the transcript
Minutes that keep for the next one

Sample

Hour three of a recorded training stream.

Illustrative lines written for this page, not a real stream. Times match a long AV1 recording.

transcript · whipscribe.com/view/transcribe-long-av1-video-file

00:03:40 Welcome back. Before the break we set up the project; now we build the first report.

01:25:16 If your numbers do not match mine, check the date filter first. That catches most people.

02:58:03 A question from chat: can this run every morning on its own? Yes, and I will show that next.

03:47:30 That is everything for today. The files from this session will be posted with the recording.

Export

One transcript. Five clean formats.

Every pack exports all five — no format is held back for a higher tier.

.txt

Plain text

De-ummed paragraphs. Ready to paste.

.srt

SRT captions

Timed to the speech. Every video editor reads this.

.vtt

WebVTT

HTML5 player + YouTube uploads.

.docx

Show notes

Formatted with chapters and pull-quotes.

.json

Machine-readable

Timestamped text for your own tools.

Pricing

Honest pricing, no surprises.

A pack from $4 (300 minutes) opens the full transcript. After that, no subscription and no auto-renew — every tier is a one-time minute pack, and credits never expire. Buy once, use the minutes whenever you need them.

Casual pack

$4/300 min

5 hours of audio — $0.80 an hour. One-time — credits never expire.

300 minutes of audio
All export formats
AI chat over the whole transcript
Executive summary & key quote

Get 300 minutes

Best value

$18/3,000 min

50 hours of audio — $0.36 an hour. Credits never expire.

3,000 minutes of audio
Summary, chapters and key quotes
All export formats
AI chat over the whole transcript

Get 3,000 minutes

Bulk pack

$32/6,000 min

100 hours of audio — $0.32 an hour. Credits never expire.

6,000 minutes of audio
Summary, chapters and key quotes
API access for batch pipelines
All export formats

Get 6,000 minutes

FAQ

Long AV1 videos: questions

Does the upload accept AV1 video?

An AV1 file in MP4 or WebM usually uploads as it is, since the transcript is made from the sound. If the upload refuses it, for example an MKV, convert to MP3 or MP4 with ffmpeg or VLC, or extract only the audio.

My recording is over 5 GB. What now?

Extract the audio. At 96 kbps, sound alone is about 43 MB an hour, so even ten hours is around 430 MB and fits the box on this page. Before the first pack, files up to 5 GB upload.

How long does a four-hour stream take?

About 8 minutes after the upload, at around 2 minutes per audio hour. A public run of 9.31 hours took 1,033 seconds.

What does a month of streams cost?

Four streams of 4 hours is 16 hours, or 960 minutes, on the $18 pack (3,000 minutes). Packs start at $4 for 300 minutes, and credits never expire.

Can I get captions for the video?

Yes. SRT and VTT exports carry the timestamps, so they line up with the original AV1 video when you add them back. TXT, DOCX and JSON are there too.

Languages and privacy?

99 languages are detected from the speech, and music and game sound are not transcribed, only voices. Recordings are transcribed on our own servers and are never used for training.

A long AV1 recording. The talk as text in minutes.

Transcribe my AV1 video

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