Use this AVI to WAV converter when an old camcorder clip, DivX/XviD file, screen recording, or lab capture needs a separate PCM audio file. AVI is a container, not an audio codec: the soundtrack might be uncompressed PCM, MP3, AC-3, or another format. This page decodes the audio and writes an audio-only WAV file in your browser; the video is not uploaded to a conversion server.
WAV is useful when an editor requests PCM or when you want an uncompressed working copy of the decoded audio. It cannot restore detail already lost in a compressed MP3 or AC-3 track, and this converter writes 16-bit PCM without a manual sample-rate or channel selector. AVI conversion uses a compatibility engine that needs a one-time WebAssembly download and can use substantial browser memory. Read the size references and keep the original AVI until you have checked the output.
Inspect the source before choosing WAV
The AVI audio codec changes what WAV means
The same .avi extension can hold very different audio. WAV always describes the new output here; the source codec determines whether that output is a clean PCM working copy or simply a much larger version of already-compressed sound.
SOURCE AUDIO
PCM in the AVI
WAV is a natural editing or handoff format. This converter writes 16-bit PCM, so verify the source bit depth if exact preservation matters.
SOURCE AUDIO
MP3, AC-3, or another lossy codec
WAV gives the decoded signal an uncompressed container, but cannot restore information discarded by the earlier lossy encode.
SOURCE AUDIO
Codec or track is unknown
Inspect the file in MediaInfo or FFprobe first, especially when it has multiple audio tracks or a specific delivery requirement.
48 kHz · 16-bit · stereo
about 11.5 MB / min
A common reference for two-channel video audio.
44.1 kHz · 16-bit · stereo
about 10.6 MB / min
A CD-rate example for stereo PCM.
44.1 kHz · 16-bit · mono
about 5.3 MB / min
A single-channel voice reference; duration and rate still determine the full size.
PCM estimate: sample rate × bit depth × channels × duration. A one-hour 48 kHz stereo file can approach 690 MB before small container overhead; actual output follows the audio stream and this export's PCM settings.
Under the hood
How the conversion works
AVI is a container, so check the audio stream itself
Audio Video Interleave can hold video and audio streams encoded separately. Older AVI files may contain PCM, MP3, AC-3, or less common codecs. The extension does not reveal the soundtrack format; MediaInfo or FFprobe can identify the codec, sample rate, channels, and track layout before conversion.
This WAV export uses 16-bit PCM
The converter writes uncompressed 16-bit PCM and does not expose a sample-rate or channel selector. A source with lossy audio remains lossy in substance after decoding, and a higher-bit-depth PCM source may be reduced to the export's 16-bit format. Verify any broadcast, archival, or client specification in an audio editor before delivery.
Long stereo WAV files need real disk space
At 48 kHz, 16-bit, stereo, PCM data is about 11.5 MB per minute, or about 690 MB per hour. Mono and lower sample-rate examples are smaller. Plan for the decoded WAV rather than the compressed AVI file size; a short AVI can still produce a much larger audio export.
AVI uses the compatibility engine in this browser
AVI files go through the FFmpeg WebAssembly engine rather than the faster WebCodecs path. The first conversion may download roughly 30 MB of engine files; the browser can cache them afterward. Processing stays on your device, but very large inputs and WAV outputs can run into browser memory limits.
Choose WAV only when the next step benefits from PCM
WAV is a straightforward choice for Audacity, a DAW, waveform inspection, or a handoff that explicitly requests PCM. For casual playback or a compact review copy, MP3 or M4A is usually easier to store and share. FLAC is an alternative for lossless compressed storage when the receiver supports it.
Which output fits an AVI audio task?
Match the export to the source stream and receiving application. The new format cannot change how the AVI audio was originally recorded or encoded.
| Output | Use it for | Trade-off |
|---|---|---|
| WAV / PCM | Editing, waveform work, or a handoff that requests uncompressed audio | Large files; no recovery of detail lost in MP3 or AC-3 |
| FLAC | Lossless storage of decoded audio in a compatible library | Compression varies; app support differs |
| MP3 | Compact review and broad playback on older devices | Lossy encoding; not a PCM editing handoff |
| M4A / AAC | Compact playback in compatible phones and libraries | A new AAC encode can add another lossy generation |
Common scenarios
When to convert AVI to WAV
Edit PCM audio from an old camcorder AVI
Some capture workflows stored uncompressed audio in AVI. Convert it to WAV for an editor that expects PCM, then verify sample rate, channel count, and duration before replacing or relinking any source media.
Inspect dialogue from a DivX or XviD archive
Separate the soundtrack from a video archive to inspect noise, dialogue, or timing in Audacity. If the AVI audio is already MP3 or AC-3, WAV is a large working copy rather than a quality restoration.
Prepare an instrumentation recording for analysis
A lab camera or capture system may wrap measurement audio in AVI. WAV can be easier to import into analysis software; confirm the expected sample rate and channels before using the file as data.
Create an audio-only archival reference
Keep a separate WAV for reviewing a lecture, demonstration, or tutorial recording without opening the video. Preserve the original AVI for picture, sync, captions, and the exact source codec.
How to
Step by step
- 1
Choose the AVI file
Select the .avi video. Keep a separate source copy, especially if it belongs to an archive, edit, or measurement workflow.
- 2
Confirm WAV is the right output
WAV is selected for this page and exports 16-bit PCM. Use it for editing or a specified PCM handoff; choose a compressed format for compact everyday listening.
- 3
Allow the AVI engine to load
The first AVI conversion loads the FFmpeg WebAssembly engine, roughly 30 MB, which can be cached for later use. Leave the tab open while the browser decodes and exports the audio.
- 4
Verify the WAV in the receiving tool
Check duration, sample rate, channels, and playback in Audacity or your DAW. Compare the start and end with the AVI if timing matters, then retain the original video.
FAQ
Frequently asked questions
How do I convert AVI to WAV online?
Choose the .avi file, keep WAV selected, and start conversion. This page processes the video in your browser with an FFmpeg WebAssembly compatibility engine and creates an audio-only 16-bit PCM WAV.
Is converting AVI to WAV lossless?
It depends on the source and output settings. WAV stores uncompressed PCM, but it cannot restore detail lost in MP3, AC-3, or another lossy AVI audio stream. This converter writes 16-bit PCM, so verify a higher-bit-depth or specified archival workflow before relying on it.
How large is an AVI to WAV file?
A 16-bit stereo WAV at 48 kHz is about 11.5 MB per minute, or roughly 690 MB per hour. Mono or a lower sample rate is smaller; exact size depends on duration, rate, bit depth, and channels.
Does the AVI file upload to a server?
No. AVI conversion runs in the browser through FFmpeg WebAssembly. The first use may download the engine, but your selected video is processed locally rather than uploaded to a conversion server.
Can I convert a very large AVI to WAV in the browser?
Large AVI inputs and WAV outputs need substantial memory, and a browser tab can run out of available WebAssembly memory. For multi-gigabyte files, use desktop FFmpeg or split the video before conversion.
What FFmpeg command extracts the first AVI audio track to WAV?
Use ffmpeg -i input.avi -map 0:a:0 -vn -c:a pcm_s16le output.wav. This converts the first audio stream to 16-bit PCM and does not include the AVI video track.
Can Audacity open WAV audio extracted from AVI?
Yes. WAV is commonly used for PCM audio in editors such as Audacity. Check the exported sample rate and channel layout against your project requirements before editing or delivering the file.
See also
Related converters