DVR to AV1 Converter
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Supports: DVR
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Need help?DVR to AV1 Converter
Convert an old .dvr recording — a DVR-MS file that Windows Media Center saved from recorded TV — into AV1, the royalty-free codec from the Alliance for Open Media. Because DVR-MS stores inefficient MPEG-2 video, re-encoding to AV1 can shrink a multi-gigabyte program to a fraction of its size at comparable quality. The trade-offs to know up front: AV1 is slow to encode, and the .av1 output is a Matroska file carrying a nonstandard extension that some players refuse.
DVR-MS Format at a Glance
| Property | Value |
|---|---|
| Full name | Microsoft Digital Video Recording (DVR-MS) |
| Released | 2004, with Windows XP Media Center Edition |
| Container | ASF-based (Advanced Systems Format) |
| Video codec | MPEG-2 |
| Audio codec | MPEG-1 Layer II or Dolby Digital (AC-3) |
| Typical size | Several GB for a one- to two-hour program |
| Copy protection | Broadcast-flagged recordings play only on the PC that recorded them |
| Superseded by | WTV (Windows Recorded TV Show), Media Center TV Pack 2008 |
| Plays today in | Windows Media Center (removed in Windows 10, 2015); VLC or mpv for unprotected files |
AV1 Output at a Glance
| Property | Value |
|---|---|
| Standard | AV1 bitstream specification, Alliance for Open Media |
| Released | March 28, 2018 (version 1.0.0, royalty-free) |
| Payload | AV1 video with an Opus audio track (default) |
| Container | Matroska — the .av1 file is Matroska-wrapped |
| Efficiency | ~30% lower bitrate than VP9, ~50% lower than H.264 at equal quality |
| Encode speed | Slow — the most compute-heavy mainstream codec |
| Codec decode support | Chrome 70+, Firefox 67+, Edge 121+; partial in Safari 17+ |
| Best for | Shrinking large legacy recordings for archival and modern devices |
How to Convert DVR to AV1
- Upload Your DVR File: Drag and drop your
.dvr(DVR-MS) recording onto the page or click "+ Add Files." You can queue several recordings and convert them with one set of options. - Pick Your Quality Preset: Under Advanced Options, open File Compression and leave Quality Preset on Very High (Recommended) for constant-quality output, or switch to Specific file size if you need to hit a size target.
- Set Video Resolution (Optional): Leave Video Resolution on Keep original, or choose a Preset Resolution to downscale — standard-definition broadcasts gain nothing from upscaling. Use the Trim control's Time Range to cut padding at the head or tail before encoding.
- Convert and Download: Click Convert and download the AV1 file. Files are uploaded over an encrypted connection, processed on our servers, and deleted automatically after a few hours. No sign-up, no watermark.
Frequently Asked Questions
What is a .dvr (DVR-MS) file?
DVR-MS (Microsoft Digital Video Recording) is the recorded-TV format Windows Media Center introduced in 2004 with Windows XP Media Center Edition, later used in Vista and Windows 7. It wraps MPEG-2 video and MPEG-1 Layer II or AC-3 audio in an ASF-based container. Microsoft replaced it with the WTV format in the 2008 Media Center TV Pack, and Media Center itself was removed from Windows 10 in 2015 — which is why these files are hard to play today.
Why won't some of my DVR-MS recordings convert?
They carry a broadcast copy-protection flag. In the DVR-MS format, a recording marked copy-protected can only be played back on the PC that recorded it, and no re-encoder — online or desktop — can strip that protection. Recordings without the flag convert without issue.
Will the AV1 file be smaller than the original DVR recording?
Usually much smaller. DVR-MS uses MPEG-2, one of the least efficient mainstream video codecs, while AV1 delivers roughly 50% lower bitrate than H.264 — and MPEG-2 is older still. The exact saving depends on the source bitrate and how much motion the footage contains, but a multi-gigabyte program typically drops to a fraction of its size at comparable visual quality.
Why is my output file named .av1 instead of .mkv?
The .av1 extension is nonstandard — most players and operating systems do not register it. Under the hood the file is a Matroska container holding an AV1 video track, so if a player refuses to open it you can simply rename the file to .mkv. If you would rather start with a recognized extension, convert to DVR to MKV or DVR to MP4 instead.
Does the .av1 output keep the audio from my recording?
Yes. The Matroska-wrapped .av1 file carries the recording's audio re-encoded to Opus alongside the AV1 video. A silent result almost always means the player cannot decode the file, not that the audio is missing — try VLC or mpv.
Is DVR to AV1 a lossless conversion?
No. DVR-MS is already-compressed MPEG-2, and AV1 is a different codec, so this is always a full re-encode with some generation loss. AV1 cannot add detail the original standard-definition broadcast never had; the goal is a smaller, more compatible file rather than a sharper one. Keeping Quality Preset on Very High minimizes visible loss.
What plays a .av1 file once I have it?
VLC and mpv open the Matroska-wrapped output directly. In our testing, extension-keyed players such as Windows Media Player refuse the file until it is renamed to .mkv, after which it plays normally. The AV1 codec itself decodes in Chrome 70+, Firefox 67+, and Edge 121+, with partial support in Safari 17+.
Is it safe to upload my recordings here?
Files travel over an encrypted connection, are processed on our servers, and are deleted automatically after a few hours. There is no sign-up, no watermark, and files are never shared or made public. To convert several recordings to different formats, the DVR converter hub lists every available output.