Convert WTV to MXF — Free Online Tool
Convert WTV recordings from Windows Media Center into MXF, the professional broadcast container used in post-production workflows. This tool re-encodes the video to H.264 and transcodes the audio to uncompressed PCM, making your recorded TV content compatible with broadcast editing systems like Avid and Adobe Premiere.
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 from Windows Media Center typically contain H.264 or MPEG-2 video alongside AAC or MP3 audio, wrapped in Microsoft's proprietary DVR container. During conversion, the video stream is re-encoded to H.264 using libx264 with a CRF of 23 — a visually transparent quality level suitable for professional use. The audio is transcoded from the WTV's compressed AAC audio to uncompressed PCM 16-bit (pcm_s16le), which is the standard audio format expected by broadcast MXF workflows. The WTV-specific metadata such as program title, episode information, and broadcast timestamps may not fully carry over to MXF, as the two formats use entirely different metadata schemas. The result is an MXF OP1a-wrapped file ready for ingest into professional editing and broadcast systems.
What Each Flag Does
| Flag | What it does |
|---|---|
ffmpeg
|
Invokes the FFmpeg tool, which handles all demuxing, decoding, encoding, and remuxing of the WTV input into the MXF output container. |
-i input.wtv
|
Specifies the input WTV file — a Windows Media Center DVR recording that may contain broadcast video (H.264 or MPEG-2), compressed AAC audio, and embedded EPG metadata. |
-c:v libx264
|
Re-encodes the video stream using the libx264 H.264 encoder, producing a broadly compatible video codec that MXF-based editing systems can ingest without issues. |
-c:a pcm_s16le
|
Transcodes the WTV's AAC audio to uncompressed 16-bit PCM (little-endian), the standard audio format expected inside professional broadcast MXF files and compatible with virtually all NLEs and playout systems. |
-crf 23
|
Sets the H.264 Constant Rate Factor to 23 for the video re-encode, a high-quality default that balances file size and visual fidelity — appropriate for broadcast-sourced content being prepared for professional post-production. |
-b:a 192k
|
Nominally sets a 192k audio bitrate target; in practice this parameter has no effect when the audio codec is pcm_s16le, since uncompressed PCM audio does not use bitrate-based compression and its data rate is fixed by the source sample rate and bit depth. |
output.mxf
|
Defines the output filename and instructs FFmpeg to wrap the encoded H.264 video and PCM audio streams into an MXF container, targeting the OP1a operational pattern used in professional broadcast and editing workflows. |
Common Use Cases
- Ingesting a recorded TV broadcast into Avid Media Composer or Adobe Premiere Pro, which favor MXF for professional media management
- Archiving recorded television content to MXF for long-term storage in a broadcast facility's media asset management system
- Preparing a recorded documentary or news segment captured via Windows Media Center for delivery to a broadcast network that requires MXF deliverables
- Converting a WTV recording into a format compatible with professional audio mixing suites that expect uncompressed PCM audio inside MXF
- Migrating a library of Windows Media Center DVR recordings to a broadcast-standard format before decommissioning legacy WTV-based systems
- Conforming recorded sports or live event content from a Windows-based capture setup into MXF for use in a professional playout or editing pipeline
Frequently Asked Questions
The video is re-encoded from the WTV source using H.264 at CRF 23, which introduces a small amount of generation loss since the original was also compressed. CRF 23 is considered a high-quality default — visually, the difference from the source is typically imperceptible. The audio, however, is upgraded from lossy AAC to uncompressed PCM 16-bit, which means the audio side of the output is actually a lossless representation of the decoded AAC signal, even though the original AAC encoding remains a ceiling on fidelity.
WTV files embed rich DVR metadata — program title, episode description, channel name, air time, and ratings — in a format specific to Windows Media Center. MXF uses a fundamentally different, SMPTE-defined metadata schema (KLV-encoded descriptive metadata). This conversion does not map WTV metadata into MXF metadata fields, so that information will not appear in standard MXF readers or editing tools. If preserving this metadata matters, you should extract it separately from the WTV file before converting.
While MXF technically supports AAC audio, the overwhelming standard in professional broadcast MXF workflows is uncompressed PCM audio — either 16-bit (pcm_s16le) or 24-bit (pcm_s24le). Broadcast systems, NLEs, and playout servers expect PCM inside MXF and may reject or mishandle AAC-wrapped MXF. Converting to pcm_s16le ensures maximum compatibility across professional tools and meets common broadcast delivery specifications.
Both WTV and MXF support multiple audio tracks, and FFmpeg will attempt to include all audio streams from the WTV source in the MXF output. Each audio track will be independently transcoded to PCM 16-bit. However, some MXF muxer configurations may handle multi-track audio differently depending on the operational pattern, so it is worth verifying track counts in your editing software after conversion.
The video quality is controlled by the -crf flag, where lower values mean higher quality and larger file sizes. The default is 23. For higher quality — useful if the WTV source is high-definition broadcast content — try -crf 18 for near-lossless H.264, or -crf 15 for even greater fidelity. For archival purposes where storage is a concern, -crf 28 reduces file size with a moderate quality reduction. The valid range for H.264 CRF is 0 (lossless) to 51 (lowest quality).
Yes. On Linux or macOS, you can run a shell loop such as: for f in *.wtv; do ffmpeg -i "$f" -c:v libx264 -c:a pcm_s16le -crf 23 -b:a 192k "${f%.wtv}.mxf"; done. On Windows Command Prompt, use: for %f in (*.wtv) do ffmpeg -i "%f" -c:v libx264 -c:a pcm_s16le -crf 23 -b:a 192k "%~nf.mxf". This processes each WTV file sequentially, applying the same quality settings to all recordings in the folder.
Technical Notes
WTV is a container format developed by Microsoft for Windows Vista Media Center and later versions, designed specifically for DVR storage of digital broadcast recordings. It can encapsulate H.264, MPEG-2, or VC-1 video alongside AAC or MP3 audio, and it embeds extensive EPG and broadcast metadata. MXF (Material Exchange Format), standardized under SMPTE 377M, is the dominant container in professional broadcast and post-production environments. This conversion targets MXF OP1a (the single-item operational pattern), which is the most widely supported MXF variant in NLEs and broadcast infrastructure. The -b:a 192k flag is included in the command but is effectively ignored when the audio codec is pcm_s16le, since PCM is uncompressed and its bitrate is determined by sample rate and bit depth rather than a target bitrate parameter. WTV subtitles (typically DVB or ATSC closed captions embedded in the broadcast stream) are not carried into MXF by this conversion, as MXF's subtitle handling requires format-specific encapsulation that is outside the scope of a straightforward remux. If the source WTV file contains VC-1 encoded video (less common but possible), FFmpeg will decode and re-encode it to H.264, which may increase processing time significantly for long recordings.