Extract Audio from MOV to OGA — Free Online Tool
Extract audio from MOV files and save it as OGA using the Vorbis codec — a fully open, royalty-free format ideal for web and Linux environments. This tool strips the video stream entirely and re-encodes the AAC or MP3 audio typically found in MOV files into an Ogg Vorbis stream, giving you a compact, open-format audio file.
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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
MOV files from Apple devices and professional editing tools typically carry AAC audio alongside H.264 or H.265 video. Since OGA is an audio-only container based on the Ogg format and does not support AAC natively, this conversion discards the video stream entirely using the -vn flag and re-encodes the audio into Vorbis (libvorbis) — a lossy, open-source codec stored in the Ogg container. The quality is controlled using Vorbis's variable bitrate quality scale (-q:a), where the default setting of 4 targets roughly 128–160 kbps. If the source MOV contains lossless or high-bitrate audio, some quality reduction will occur during this transcoding step, but at quality level 4 the result is transparent for most listeners.
What Each Flag Does
| Flag | What it does |
|---|---|
ffmpeg
|
Invokes the FFmpeg binary. When run locally on your desktop, this is the command-line tool; in the browser, this tool runs the equivalent via FFmpeg.wasm compiled to WebAssembly. |
-i input.mov
|
Specifies the input file — a MOV container, which may hold video encoded as H.264 or H.265, audio encoded as AAC, and potentially multiple tracks, chapters, and metadata atoms in Apple's QuickTime structure. |
-vn
|
Disables video output entirely, telling FFmpeg to ignore all video streams from the MOV file. This is what makes the operation an audio extraction rather than a container conversion — no video data is written to the OGA file. |
-c:a libvorbis
|
Encodes the audio stream using the Vorbis codec via the libvorbis encoder. This is required because OGA is an Ogg-based container and cannot store the AAC audio typically found in MOV files — Vorbis is the standard lossy codec native to the Ogg ecosystem. |
-q:a 4
|
Sets the Vorbis variable bitrate quality level to 4 on a 0–10 scale, targeting approximately 128–160 kbps. This is the default balance between file size and audio fidelity; increase to 6–8 for higher quality or decrease to 2–3 to reduce file size. |
output.oga
|
Specifies the output filename with the .oga extension, which signals an Ogg container carrying audio-only content (as opposed to .ogv for video or the generic .ogg). FFmpeg infers the Ogg container format from this extension. |
Common Use Cases
- Extracting a voiceover or narration track from a Final Cut Pro or DaVinci Resolve MOV export to publish on a website using open-format audio
- Pulling music or ambient audio from an Apple ProRes MOV file for use in a Linux-based audio production pipeline that relies on Ogg Vorbis
- Converting MOV interview footage audio to OGA for embedding in an open-source web project or CMS that avoids proprietary codecs
- Stripping audio from MOV screen recordings captured on macOS to produce podcast-ready audio in a patent-free format
- Archiving the audio track from MOV video files for use with media players or games built on the GStreamer or SDL2 frameworks, which natively support OGA/Vorbis
- Preparing audio from a MOV camera recording for upload to platforms or archives that require open-standard formats such as Wikimedia Commons
Frequently Asked Questions
Yes, in almost all cases. MOV files typically store audio as AAC, which is already a lossy format. Re-encoding from AAC to Vorbis means a second round of lossy compression, which introduces some generation loss. At the default -q:a 4 setting (roughly 128–160 kbps VBR), the degradation is subtle and unlikely to be noticeable for speech or general listening, but if you need pristine quality, consider encoding to FLAC inside OGA instead by changing the codec to flac.
The OGA container is based on the Ogg format, which is designed specifically to carry Ogg-native codecs: Vorbis, FLAC, and Opus. AAC is not a supported codec inside an Ogg container, so a transcoding step to Vorbis (or another supported codec) is mandatory. This is a fundamental container compatibility constraint, not a limitation of this tool.
Adjust the -q:a value in the command. The Vorbis quality scale runs from 0 (lowest, ~64 kbps) to 10 (highest, ~500 kbps), with 4 as the default (roughly 128–160 kbps). For example, use -q:a 6 for higher quality (~192 kbps) or -q:a 2 for smaller files (~96 kbps). If you switch the codec to flac with -c:a flac, the -q:a flag no longer applies and you get lossless audio instead.
OGA/Ogg Vorbis uses Vorbis Comment tags for metadata, while MOV uses iTunes-style atoms. FFmpeg will attempt to map common metadata fields such as title, artist, and album when converting, but some MOV-specific metadata — like chapter markers from Final Cut Pro or Apple-specific extended tags — may not transfer cleanly. The OGA format does support chapter markers via Ogg skeleton streams, but FFmpeg does not automatically carry MOV chapter data into OGA output.
By default, FFmpeg selects the best-ranked audio stream (usually the first one) from the MOV file and encodes only that into the OGA output. OGA does not support multiple audio tracks in the way MOV does. If you need a specific track, add -map 0:a:1 (for the second audio track, zero-indexed) to the command before the output filename to select it explicitly.
Yes, using a shell loop on Linux or macOS: for f in *.mov; do ffmpeg -i "$f" -vn -c:a libvorbis -q:a 4 "${f%.mov}.oga"; done. On Windows Command Prompt, use: for %f in (*.mov) do ffmpeg -i "%f" -vn -c:a libvorbis -q:a 4 "%~nf.oga". This processes each MOV in the current directory and outputs a matching OGA file. The in-browser tool handles one file at a time, so the desktop FFmpeg command is especially useful for bulk workflows.
Technical Notes
OGA is strictly an audio container — it is the audio-only variant of the Ogg container format, distinguished from OGG by convention to signal that it contains no video. The Vorbis codec stored inside uses psychoacoustic lossy compression similar in concept to MP3 and AAC, but is entirely royalty-free and patent-unencumbered, making it the preferred format for open-source projects and web distribution without licensing concerns. MOV source files from Apple devices or professional NLEs will almost always carry AAC-LC or AAC-HE audio, meaning this conversion is always a transcode (never a simple stream copy), and some quality loss is inherent. For highest fidelity from a high-quality MOV source, substitute -c:a flac in the command to produce lossless FLAC audio inside the OGA container — the file will be larger but bit-for-bit accurate. The Vorbis -q:a scale is not linear in bitrate; quality level 4 typically yields 128–160 kbps, while level 6 reaches around 192 kbps. OGA has limited support in Apple ecosystems — Safari and iOS do not natively support Ogg Vorbis playback — so if cross-platform compatibility is a priority, consider M4A or MP3 instead. For modern open-format use cases requiring better compression than Vorbis, Opus inside an OGA container (-c:a libopus) is worth considering, though it technically uses the .opus or .oga extension convention.