Extract Audio from M4V to OGG — Free Online Tool
Extract audio from M4V video files and convert it to OGG format using the open Vorbis codec — ideal for stripping iTunes or iOS video audio into a freely distributable, open-standard format. The AAC audio track in your M4V is decoded and re-encoded as Vorbis, producing an OGG file playable across Linux, Android, and web-based media players.
to
FFmpeg Command
Copy this command to run the same conversion locally with FFmpeg on your desktop. Download FFmpeg
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Settings
Note: Browser-based encoding uses approximate quality targets. For precise CRF compression, copy the FFmpeg command above and run it on your desktop.
Estimated output:
Conversion Complete!
DownloadHow It Works
M4V files typically contain an H.264 video stream alongside an AAC audio track, packaged in Apple's MPEG-4 container. This tool discards the video stream entirely using FFmpeg's -vn flag and re-encodes the AAC audio as Vorbis, stored in an OGG container. Because AAC and Vorbis use entirely different compression algorithms, a full transcode is required — the audio is decoded from AAC first, then re-encoded using the libvorbis encoder at the target quality level. The result is an open-format OGG/Vorbis file with no video data, significantly smaller than the original M4V. Note that since both AAC and Vorbis are lossy codecs, this transcode involves a second generation of lossy compression, which can cause minor quality degradation compared to the original source.
What Each Flag Does
| Flag | What it does |
|---|---|
ffmpeg
|
Invokes the FFmpeg multimedia processing tool, which handles all decoding, stream selection, re-encoding, and container packaging for this M4V-to-OGG audio extraction. |
-i input.m4v
|
Specifies the input M4V file. FFmpeg reads the MPEG-4 container and identifies all available streams — typically an H.264 video track and an AAC audio track — before applying the output options. |
-vn
|
Disables video output entirely, telling FFmpeg to ignore the video stream from the M4V and produce an audio-only output. Without this flag, FFmpeg would attempt to include video, which OGG does not meaningfully support for this use case. |
-c:a libvorbis
|
Selects the libvorbis encoder to re-encode the M4V's AAC audio as Vorbis — the native codec for OGG audio files. Since AAC cannot be placed directly into an OGG container, this full transcode from AAC to Vorbis is required. |
-q:a 4
|
Sets the Vorbis encode quality to level 4 on a 0–10 VBR scale, targeting approximately 128 kbps. This is the default balance point for Vorbis — producing audio that is indistinguishable from the AAC source for most listeners while keeping the OGG file size reasonable. |
output.ogg
|
Defines the output filename and tells FFmpeg to write the result as an OGG container. FFmpeg infers the OGG container format from the .ogg extension and packages the encoded Vorbis audio stream inside it. |
Common Use Cases
- Extracting the audio commentary from an iTunes movie or TV episode download to listen to offline in a media player that doesn't support M4V or AAC
- Converting Apple-ecosystem video content to OGG/Vorbis for use in open-source game engines like Godot, which natively prefer OGG audio assets
- Stripping audio from iOS screen recordings exported as M4V to produce a narration track for a Linux-based video editing workflow
- Preparing audio from M4V educational or lecture videos for upload to platforms or archives that require open, patent-free formats
- Extracting background music or ambient audio from M4V video files to use as freely shareable audio in projects where AAC licensing is a concern
- Converting M4V audio tracks to OGG for embedding in HTML5 web applications targeting Firefox, which has historically favored Vorbis over AAC
Frequently Asked Questions
Yes, some quality loss is unavoidable. The original M4V almost certainly contains AAC audio, which is already a lossy format. Converting it to Vorbis means the audio is decoded from AAC and then re-encoded with a second lossy algorithm. The default quality setting (-q:a 4) produces output roughly equivalent to 128 kbps, which is transparent for most listeners, but audiophiles may notice subtle differences. If preserving maximum fidelity matters, consider extracting to FLAC or WAV instead, which avoid a second lossy compression stage.
The OGG container format is designed specifically for Xiph.Org codecs — primarily Vorbis, Opus, and FLAC. It does not support raw AAC streams. Because of this container-codec incompatibility, the AAC audio must be fully decoded and re-encoded as Vorbis to produce a valid OGG file. This is fundamentally different from, say, moving AAC audio from M4V into an MP4 or MKV container, where a stream copy (-c:a copy) would be possible.
Vorbis uses a variable bitrate quality scale from 0 (lowest) to 10 (highest), where -q:a 4 targets approximately 128 kbps and is considered a good general-purpose setting. To increase quality, raise the value — for example, -q:a 6 targets around 192 kbps and is suitable for critical listening. To reduce file size at the expense of quality, lower it to -q:a 2 or -q:a 3. In the FFmpeg command shown on this page, simply replace the 4 with your desired value before running it locally.
M4V supports chapter metadata, and OGG also has a chapter support feature. However, chapter handling during this conversion depends on how FFmpeg maps metadata between these two container formats, and in practice, chapter markers from M4V files are often not reliably transferred to OGG output. If chapters are important, verify the output using a tool like MediaInfo or VLC after conversion, and consider manually adding chapter metadata to the OGG file using a dedicated tag editor.
Yes. On Linux or macOS, you can wrap the command in a shell loop: for f in *.m4v; do ffmpeg -i "$f" -vn -c:a libvorbis -q:a 4 "${f%.m4v}.ogg"; done. On Windows using PowerShell, iterate with Get-ChildItem and invoke FFmpeg for each file. This approach is especially useful for processing large collections of iTunes downloads that exceed the 1GB browser limit of this online tool.
No — Apple's ecosystem does not natively support OGG or Vorbis. iOS, macOS's built-in media frameworks, and the Apple Music/iTunes app all lack native OGG playback. If you need audio that works on Apple devices, you would be better off keeping the AAC codec or converting to MP3. OGG/Vorbis is best suited for Android, Linux, web browsers (especially Firefox and Chrome), and open-source applications — making this conversion most useful when you are moving away from Apple-specific workflows.
Technical Notes
M4V is Apple's variant of the MPEG-4 container, nearly identical to MP4 but optionally supporting Apple's FairPlay DRM. If your M4V file has DRM applied (such as purchased iTunes content), FFmpeg will be unable to read the audio stream and the conversion will fail — only DRM-free M4V files can be processed. The audio in M4V files is almost universally AAC encoded at 128–256 kbps. During conversion, libvorbis re-encodes this using a VBR quality ladder; at -q:a 4, output bitrates typically land between 112–160 kbps depending on content complexity. OGG's Vorbis codec does not support the same metadata tag scheme as M4V's iTunes atom-based tags (e.g., cover art, album, artist fields stored in MP4 metadata atoms) — some tags may transfer via FFmpeg's metadata mapping, but iTunes-specific atoms like artwork will be lost. OGG supports multiple audio tracks and chapters in theory, but practical tool support for multi-track OGG files is limited. The output OGG file will contain only a single Vorbis audio stream, derived from the first (or default) audio track of the M4V source.