Convert WTV to WEBA — Free Online Tool
Convert WTV recorded TV files from Windows Media Center to WEBA format, extracting just the audio track and encoding it with the Opus codec for efficient web playback. This is ideal for pulling broadcast audio — talk shows, news segments, or radio-style content — out of bulky DVR recordings into a compact, streamable audio file.
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 recorded by Windows Vista/7 Media Center typically contain an H.264 or MPEG-2 video stream alongside AAC or AC-3 audio, plus embedded broadcast metadata. Converting to WEBA discards the video entirely (using the -vn flag) and re-encodes only the audio stream from whatever codec it was recorded in (commonly AAC) into Opus, the default and most efficient codec for the WEBA/WebM container. Opus is a modern lossy codec that outperforms MP3 and AAC at equivalent bitrates, especially at lower bitrates like 64k–128k. The resulting WEBA file contains only the Opus-encoded audio in a WebM container, stripping all video data, broadcast metadata, EPG information, and subtitle tracks that the WTV format originally carried.
What Each Flag Does
| Flag | What it does |
|---|---|
ffmpeg
|
Invokes the FFmpeg tool, which handles all demuxing, decoding, encoding, and muxing for this conversion. In the browser version, this runs as a WebAssembly binary with no server involvement. |
-i input.wtv
|
Specifies the input WTV file — a Windows Media Center broadcast recording that may contain video, one or more audio tracks, subtitles, and embedded EPG metadata. |
-c:a libopus
|
Instructs FFmpeg to encode the output audio using the Opus codec via the libopus encoder. Opus is the standard audio codec for the WEBA/WebM container and delivers excellent quality at web-friendly bitrates, outperforming the AAC or AC-3 audio typically found in WTV files at equivalent bitrates. |
-b:a 128k
|
Sets the Opus audio encoding bitrate to 128 kilobits per second. This is a good default for broadcast content — high enough to preserve full audio quality for both speech and music from TV recordings, while keeping the WEBA file compact. |
-vn
|
Disables video output entirely, which is required here because WEBA is an audio-only container. This flag explicitly tells FFmpeg to drop all video streams from the WTV recording and produce a pure audio file. |
output.weba
|
Specifies the output filename with the .weba extension, which signals to FFmpeg to use the WebM container in audio-only mode. The resulting file will contain a single Opus audio stream and can be played natively in modern web browsers. |
Common Use Cases
- Extract the audio from a recorded TV interview, documentary, or talk show to create a podcast-friendly audio file for web hosting or streaming
- Pull the audio commentary from a recorded sports broadcast to review play-by-play without storing the large video file
- Convert a Windows Media Center recording of a radio simulcast or music performance into a lightweight WEBA file for embedding in a web page
- Archive the audio from old WTV recordings before deleting the original large video files, preserving just the spoken-word or musical content
- Prepare a recorded news segment's audio for use in a web application or media player that supports WebM/Opus natively (e.g., modern Chromium-based browsers)
- Extract audio from a WTV recording for transcription or accessibility workflows where only the audio content is needed
Frequently Asked Questions
Yes — the WEBA/WebM container does not support the kind of broadcast metadata embedded in WTV files, such as EPG (Electronic Program Guide) data, channel information, or recording timestamps. That metadata will be stripped entirely during conversion. If preserving that information matters, note it separately before converting, as there is no way to carry it into the WEBA format.
By default, FFmpeg selects the first (primary) audio stream from the WTV file, which is typically the main broadcast audio track. WEBA does not support multiple audio tracks, so only one track will be present in the output. If you need to extract a secondary audio track instead, you would need to modify the FFmpeg command to add a flag like '-map 0:a:1' to explicitly select the second audio stream before the output filename.
WTV files contain full video data alongside audio, and broadcast recordings are typically encoded at high bitrates to preserve picture quality — a one-hour recording can easily be several gigabytes. The WEBA output discards all video and encodes only the audio at 128k using Opus, which is an extremely efficient codec. An hour of Opus audio at 128k is roughly 58MB, compared to a WTV file of the same duration that might be 4–8GB or more.
Yes, there is a small amount of generational quality loss because the audio is being transcoded — decoded from its original format (typically AAC or AC-3 in the WTV file) and then re-encoded as Opus. However, Opus at 128k (the default bitrate used here) is generally considered transparent or near-transparent for most broadcast audio content, including speech and typical music. The quality loss is unlikely to be perceptible for voice-heavy content like news or talk shows.
The audio bitrate is controlled by the '-b:a 128k' flag. You can increase it for higher quality (e.g., '-b:a 192k' or '-b:a 256k') or decrease it for a smaller file (e.g., '-b:a 96k' or '-b:a 64k'). Opus is notably efficient at low bitrates — 64k Opus is often indistinguishable from 128k AAC for speech content, so you can go lower for voice recordings without significant quality degradation.
Yes — on Linux or macOS you can use a shell loop: 'for f in *.wtv; do ffmpeg -i "$f" -c:a libopus -b:a 128k -vn "${f%.wtv}.weba"; done'. On Windows Command Prompt, use: 'for %f in (*.wtv) do ffmpeg -i "%f" -c:a libopus -b:a 128k -vn "%~nf.weba"'. This is particularly useful if you have a large archive of Windows Media Center recordings you want to extract audio from in bulk.
Technical Notes
WTV is a container format developed specifically for Windows Vista/7 Media Center and uses a structured storage format based on Microsoft's Compound Document File. It typically wraps MPEG-2 or H.264 video with AAC, AC-3, or MP2 audio, and carries rich broadcast metadata including EPG data. FFmpeg has solid WTV demuxing support, but all of that metadata is lost in the conversion to WEBA since WebM has no equivalent metadata fields for broadcast information. The WEBA format is simply a WebM container restricted to audio-only content, and the Opus codec used here (libopus) was standardized by the IETF and is natively supported in all modern browsers without plugins. One known limitation: if the WTV file was recorded with copy protection (DRM) applied by the cable card or broadcast source, FFmpeg will be unable to decode it and the conversion will fail. Additionally, WTV files with corrupted or missing index data (common in incomplete recordings due to power loss) may result in truncated or glitchy audio output.