AV1 to AIFF Converter

Extract AIFF Audio from AV1 Video: What This Tutorial Covers

This walk-through is for anyone holding an AV1-encoded video — a YouTube download, an MKV rip, a WebM screen capture — who needs the soundtrack as an uncompressed AIFF file for a Mac DAW. By the end you'll have an audio-only AIFF (the picture is discarded), you'll know why it ends up much larger than the source, and you'll know the one thing AIFF can and can't do for already-compressed audio.

How to Convert AV1 to AIFF

1. Upload Your AV1 File: Drag and drop or click "Add Files" to select your AV1 video. AV1 usually lives inside an .mp4, .webm, or .mkv container, and all of those upload here. Batch is supported, so you can drop a folder of clips and extract them in one pass.
2. Pick Audio Codec (Advanced Options): AIFF defaults to PCM 16-bit big-endian (PCM_S16BE) — the classic macOS AIFF flavor and CD-quality. For more editing headroom choose PCM 24-bit; A-law and mu-law are available for telephony-style archives.
3. Set Audio Sample Rate and Channel (Optional): Leave Audio Sample Rate on Original to avoid resampling, or pick 44100 Hz (CD) or 48000 Hz (video standard). Set Audio Channel to Original, Stereo, or Mono, and use Trim to grab just a segment (start time + duration in seconds or HH:MM:SS.sss).
4. Convert and Download: Click Convert. Files are processed on our servers and download individually or as a ZIP. No sign-up, no watermark.

Walk-through: Choosing Codec, Sample Rate, and Channels

The default (PCM_S16BE, Original sample rate, Original channels) is the right choice for most people — it produces a standard AIFF that Logic Pro, GarageBand, Pro Tools, and Final Cut Pro import without conversion. Reach for the Advanced Options only when you have a specific downstream need:

• If you'll do heavy editing (EQ, compression, pitch/time-stretch): set the codec to PCM 24-bit. The extra 8 bits give roughly 48 dB more headroom before quantization noise stacks up across processing passes. It will not recover detail the AV1's lossy audio already discarded, but it stops new loss from accumulating.
• If the destination is CD, podcast, or streaming: keep the default 16-bit. Extra bit depth is wasted bits at that target.
• If size matters and the content is speech: set Audio Channel to Mono (halves the file) and the sample rate to 24000 Hz or 16000 Hz.
• If you want to keep the source untouched: leave Audio Sample Rate and Audio Channel on Original — the converter copies the source layout and rate, so the only transformation is the lossy-codec-to-PCM decode.

Common Errors and How to Fix Them

• "The AIFF is way bigger than my AV1 file" — This is expected, not a bug. AIFF is uncompressed PCM: 16-bit / 44.1 kHz stereo runs ~1411 kbps (about 10 MB per minute), while the AV1's Opus or AAC audio sits around 96-256 kbps. A short clip with a long soundtrack can produce an AIFF larger than the whole source video. If you need a small, portable file, use AV1 to MP3 or AV1 to M4A instead.
• "The output is silent / has no sound" — The AV1 file's video track decoded but the audio track didn't. Some AV1 captures (silent screen recordings, GIF-style clips) genuinely have no audio. Confirm the source plays with sound in VLC before extracting.
• "AIFF won't open in my Windows app" — A few very old utilities choke on big-endian byte order. Pick PCM 16-bit Little Endian (PCM_S16LE) for a little-endian AIFF, or convert to WAV with AV1 to WAV, which is little-endian by convention.
• "It sounds the same as the compressed original, not better" — Correct, and that's the key point below: a lossless container does not mean lossless audio.

When This Doesn't Work — The Lossless-Container Honesty

AV1 is a video codec from the Alliance for Open Media (bitstream announced March 28, 2018, royalty-free). It carries no audio of its own — the audio track riding alongside AV1 is almost always Opus or AAC, both of which are lossy. Decoding that track into uncompressed AIFF PCM gives you a big, WAV-like file, but it cannot restore any detail the lossy compression already threw away. You get bit-perfect samples of the already-compressed audio — not better sound. The win is downstream: once it's PCM, every subsequent edit and export in your DAW is lossless, so you only ever pay the lossy generation once. If the audio is DRM-protected or the file is corrupted, extraction will fail regardless of output format — there's no software fix for a broken or encrypted source.

Frequently Asked Questions

Does converting AV1 to AIFF improve the audio quality?

No. AIFF is an uncompressed PCM container, but it can only preserve what's in the source. AV1 video carries lossy Opus or AAC audio, so the AIFF is a bit-perfect decode of that already-compressed stream — the compression artifacts are baked in and cannot be undone. AIFF stops further degradation during DAW editing; it does not reverse the loss that already happened.

Why is the AIFF so much larger than my AV1 file?

Because you're trading compression for fidelity. The AV1's audio is perhaps 96-256 kbps Opus/AAC, while 16-bit / 44.1 kHz stereo AIFF is uncompressed PCM at ~1411 kbps — roughly 6-15x larger. In our testing, a 3-minute AV1 clip with ~128 kbps Opus audio (about 2.8 MB of audio data) produced a ~30 MB AIFF at the default 16-bit/44.1 kHz stereo. A larger file is the expected price of bit-perfect, instantly-seekable audio in a DAW.

Which AIFF codec does this output by default, and why big-endian?

The default is PCM_S16BE — 16-bit signed big-endian PCM. Big-endian is the historical Apple byte order baked into the AIFF spec (AIFF was introduced by Apple in 1988, based on Electronic Arts' IFF format). It's the flavor Logic Pro, GarageBand, and Final Cut Pro expect. If you need little-endian for a finicky Windows tool, pick PCM_S16LE instead.

Should I pick AIFF or WAV when extracting from AV1?

They're functionally identical in quality — both are uncompressed PCM. AIFF is big-endian (Apple convention) and is native to Logic Pro, GarageBand, and Final Cut Pro on macOS. WAV is little-endian (Microsoft convention) and is the Windows DAW default. If your editing target is a Mac DAW, pick AIFF; for a Windows handoff, use AV1 to WAV. For the reverse direction later, see AIFF to WAV.

Can I pull just one segment of the AV1 video's audio?

Yes. Use the Trim control to enter a start time and duration. Both accept plain seconds (12.5) or HH:MM:SS.sss format (00:02:15.250). It's the quick way to isolate a single song from a concert capture, one line of dialogue from a screen recording, or a chapter of a long lecture without exporting the whole soundtrack.

How long do you keep my uploaded AV1 file?

Files are uploaded over an encrypted connection, processed on our servers, and deleted automatically a few hours after conversion. There's no sign-up, no watermark, and your files are never shared or made public. The main practical limit on a big AV1 file is upload size and time, not the conversion itself.