Convert WTV to OGA — Free Online Tool
Convert WTV broadcast recordings from Windows Media Center into OGA audio files using the Vorbis codec, extracting just the audio track from your recorded TV content. This is ideal for archiving commentary, talk shows, or audio-only content from DVR recordings in an open, widely-supported Ogg container format.
to
FFmpeg Command
Copy this command to run the same conversion locally with FFmpeg on your desktop. Download FFmpeg
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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
WTV files are Microsoft's proprietary DVR container used by Windows Vista and 7 Media Center, typically storing H.264 or MPEG-2 video alongside AAC or AC-3 audio. During this conversion, FFmpeg reads the WTV container, discards the video stream entirely (since OGA is audio-only), and re-encodes the audio track using the Vorbis codec (libvorbis) into an Ogg container. This is a transcode — not a remux — because the source audio (often AAC or AC-3) is incompatible with the OGA container, which only accepts Vorbis, FLAC, or Opus streams. The quality level is set to VBR quality 4, which is roughly equivalent to 128–160 kbps and represents a balanced tradeoff between file size and fidelity for speech and music alike.
What Each Flag Does
| Flag | What it does |
|---|---|
ffmpeg
|
Invokes the FFmpeg command-line tool, which is the engine running inside your browser as WebAssembly (FFmpeg.wasm) for the online version of this tool. |
-i input.wtv
|
Specifies the input file in WTV format — Microsoft's proprietary Windows Media Center DVR container. FFmpeg uses its WTV demuxer to parse the broadcast recording, separating video, audio, and metadata streams. |
-c:a libvorbis
|
Sets the audio encoder to libvorbis, which re-encodes the source audio (typically AAC or AC-3 from the WTV recording) into the Vorbis codec — the only lossy codec natively compatible with the OGA/Ogg container being produced. |
-q:a 4
|
Sets the Vorbis VBR quality level to 4 on a 0–10 scale, targeting an average bitrate of approximately 128 kbps. This is a general-purpose quality level that balances file size and audio fidelity for both speech-heavy TV content and music recordings. |
output.oga
|
Defines the output file as an OGA file — an Ogg container holding only the re-encoded Vorbis audio stream, with the video and subtitle tracks from the original WTV recording discarded entirely. |
Common Use Cases
- Extract audio commentary or dialogue from a recorded TV talk show or news program to listen to on a Vorbis-compatible audio player without needing to keep the large WTV video file
- Archive the audio from a recorded live music television broadcast as a lightweight OGA file for offline playback in open-source media players like VLC or Audacious
- Strip the audio from a Windows Media Center DVR recording of a sports broadcast to create a smaller file for reviewing game audio or commentary
- Convert recorded radio-over-TV broadcasts captured with Windows Media Center into OGA for use in Linux-based media libraries that natively support the Ogg ecosystem
- Extract interview or podcast-style content from a recorded TV episode to repurpose as an audio file, shedding the proprietary WTV wrapper in favor of an open-standard format
- Reduce storage footprint of old Windows Media Center recordings by extracting only the audio portion as a compressed Vorbis OGA file when the video content is no longer needed
Frequently Asked Questions
By default, FFmpeg will select the first (primary) audio track from the WTV file and encode it into the OGA output. WTV files can contain multiple audio tracks — for example, a secondary language or an audio description track — but OGA only supports a single audio stream. If you need a specific track other than the first, you can add '-map 0:a:1' (or whichever index you need) to the FFmpeg command before the output filename to select it explicitly.
OGA (Ogg Audio) only supports Vorbis, FLAC, and Opus audio codecs. WTV recordings from Windows Media Center typically store audio as AAC or AC-3 (Dolby Digital), neither of which is valid inside an Ogg container. Because of this codec mismatch, FFmpeg must fully decode the source audio and re-encode it as Vorbis — a stream copy with '-c:a copy' would produce an invalid or unplayable file.
The '-q:a 4' flag controls the Vorbis VBR quality level on a scale from 0 (lowest, ~64 kbps) to 10 (highest, ~500 kbps). To increase quality, raise the value — for example, '-q:a 6' targets approximately 192 kbps and is a good choice for music recordings. For speech-heavy content like news or talk shows, '-q:a 3' is typically sufficient and produces smaller files. Alternatively, you can switch to FLAC for lossless audio by replacing '-c:a libvorbis -q:a 4' with '-c:a flac'.
WTV files often contain rich DVR metadata such as program title, episode description, channel name, and air time stored in Microsoft-specific metadata fields. FFmpeg will attempt to map compatible metadata fields (like title and date) into Ogg Vorbis comment tags in the OGA output, but proprietary WTV-specific fields such as channel number or broadcast provider information are likely to be dropped. If metadata preservation is critical, you may want to manually set tags using '-metadata title="Show Name"' flags in the command.
FFmpeg handles both Vista and Windows 7 WTV files through the same demuxer, but there can be minor differences in how metadata and codec profiles are stored between versions. Windows 7 WTV recordings more commonly use H.264 video with AAC audio, while Vista-era recordings sometimes used MPEG-2 video with AC-3 audio. In both cases, the audio will be re-encoded to Vorbis for the OGA output — the source audio codec does not affect the final result, only the decoding step differs internally.
Yes. On Linux or macOS you can loop through files in a directory using a shell command like: 'for f in *.wtv; do ffmpeg -i "$f" -c:a libvorbis -q:a 4 "${f%.wtv}.oga"; done'. On Windows Command Prompt, use: 'for %f in (*.wtv) do ffmpeg -i "%f" -c:a libvorbis -q:a 4 "%~nf.oga"'. This is particularly useful when archiving a large collection of old Windows Media Center recordings, since the browser-based tool processes one file at a time.
Technical Notes
WTV is a container tied to the Windows Media Center ecosystem and is not natively supported on most non-Windows platforms, making the OGA format a more portable alternative for audio content. The conversion drops video, subtitle streams (even though WTV supports embedded closed captions), and chapter data entirely — OGA is strictly an audio container. The libvorbis encoder used here produces VBR (variable bitrate) output, meaning the actual bitrate will fluctuate based on audio complexity; a quality level of 4 typically averages around 128 kbps, which is appropriate for both speech and general music. For archiving recorded music performances where fidelity is paramount, consider switching the codec to FLAC ('-c:a flac'), which OGA natively supports for lossless output at the cost of larger file sizes. One known limitation is that Dolby Digital (AC-3) surround audio tracks in WTV files will be downmixed during the Vorbis transcode, so multichannel surround will be converted to stereo unless you explicitly specify channel layout flags. Additionally, because WTV is a Microsoft-proprietary format, some recordings with DRM (Digital Rights Management) protection cannot be processed by FFmpeg at all — only unprotected recordings from over-the-air or unencrypted cable sources will convert successfully.