AV1 to AIFF Converter

Converting AV1 to AIF: Read This First

If you have a raw .av1 file and you want an .aif audio file out of it, there is an important catch: a raw .av1 stream is video only. The AV1 bitstream defined by AOMedia carries coded video in Open Bitstream Units (sequence headers, frame and tile data, metadata) and no audio at all — audio always lives in a container layer such as WebM or MKV, never in the AV1 stream itself. So "extracting audio to AIF" from a true .av1 file gives you a silent or empty result, because there is nothing to extract. This page explains what is actually happening and where to go instead.

How to Convert AV1 to AIF

1. Upload Your AV1 File: Drag and drop your .av1 file or click "+ Add Files". Files upload over an encrypted connection.
2. Set Audio Channel and Sample Rate: Use the Audio Channel and Audio Sample Rate dropdowns in Advanced Options; "Original" keeps whatever the source provides (for a video-only AV1 stream, that is no audio).
3. Trim (Optional): Set a start time and duration under Trim if you only want part of the timeline.
4. Convert and Download: Click "Convert" to get an AIF file (uncompressed 16-bit big-endian PCM). No sign-up, no watermark.

What Actually Happens with a Raw AV1 File

The output .aif is a standard Audio Interchange File: lossless, uncompressed PCM, big-endian byte order — Apple's 1988 format, the macOS counterpart to WAV. The problem is upstream of the format, not the format itself:

• A true raw .av1 elementary stream has no audio track, so the resulting AIF will be silent or zero-length. That is expected behavior for a video-only input, not a conversion bug.
• If your file plays with sound in a media player, it is almost certainly not a raw .av1 stream — it is a container (.webm, .mkv, .mp4) that holds AV1 video plus a separate audio track. In that case the audio is real and extractable, just through the container's tool.
• AV1 encoding pipelines confirm this split: encoders produce AV1 video on its own and mux a separate Opus/AAC audio track into WebM or MKV afterward. The audio never enters the AV1 bitstream.

Where to Go Instead

• Your file is actually .webm or .mp4 (container with sound): use WebM to AIF or MP4 to AIF to pull a real AIF audio track. For a compressed result, WebM to MP3 is smaller.
• You want to keep the AV1 video but in a playable wrapper: convert to a container with AV1 to MP4 or AV1 to WebM, then add or extract audio from there.
• You have a whole batch of AV1 files in different targets: the AV1 converter hub covers every available output.

AIF Format at a Glance

AIF vs WAV at a Glance

Both are uncompressed PCM containers with identical audio quality; the practical differences are origin and byte order.

Frequently Asked Questions

Why is my AV1-to-AIF output silent or empty?

Because a raw .av1 file is a video-only bitstream with no audio track. The AOMedia AV1 specification defines only video data in its Open Bitstream Units; audio is never stored inside the stream. With nothing to decode into audio, the AIF comes out silent. If you expected sound, your source is probably a container file (see below), not a true raw AV1 stream.

How do I tell whether my file is raw AV1 or a container?

Check the real container, not just the name. If the file plays with audio in VLC or QuickTime, it is a container (.webm, .mkv, or .mp4) carrying AV1 video plus a separate audio track. A genuine raw .av1 elementary stream usually will not play in standard players at all and has no embedded sound. A tool like MediaInfo will list the tracks so you can confirm before converting.

My video has sound — how do I actually get an AIF audio file?

Convert from the container that holds the audio, not from the AV1 video stream. If your file is WebM, use WebM to AIF; if it is MP4, use MP4 to AIF. Both pull the embedded audio track and write it out as lossless AIF.

Is the AIF output lossless?

Yes — when there is audio to convert. Our pipeline writes 16-bit big-endian PCM, the uncompressed format AIFF was built around, so there is no lossy re-encoding step. In our testing, a 3-minute stereo source extracted from a WebM container produced a roughly 30 MB AIF, consistent with PCM's ~10 MB-per-minute footprint at CD quality.

Should I use AIF or WAV?

They are technically near-identical — both are uncompressed PCM containers. The only meaningful difference is byte order: AIFF is big-endian and originated on Apple/Mac platforms, while WAV is little-endian and originated on Windows. Pick AIF if you work in macOS/iOS audio tools or want a Mac-native master; pick WAV for broader cross-platform compatibility. Quality is identical.

Will trimming change the audio quality?

No. Trimming only selects a time range — the audio is decoded and written out as uncompressed PCM exactly like an untrimmed conversion, and because PCM is lossless, cutting the clip shorter adds no quality loss of its own. It is a safe way to shorten a file.

What audio codec is usually paired with AV1 video?

Opus and AAC are the common partners. When AV1 video is muxed into a WebM container, the audio track is almost always Opus; when it is placed in MP4 or MKV, it is typically AAC, and MKV sometimes carries Opus too. AV1 itself never holds the audio — it is always a separate track in the container. That is why, to get an AIF out, you convert from the container (WebM, MP4, or MKV), not from the raw AV1 stream, which has no audio at all.

What happens to my file after conversion?

Files are uploaded over an encrypted connection, processed on our servers, and deleted automatically after a few hours. There is no sign-up, no watermark, and files are never shared or made public.