DVR to AV1 Converter

Convert DVR to AV1: What This Tutorial Covers

This walks through re-encoding an old .dvr recording — a DVR-MS recorded-TV file from Windows Media Center, which stores MPEG-2 video in an ASF-based container — into AV1, the modern royalty-free codec from the Alliance for Open Media. It is for anyone with a shelf of legacy Media Center recordings that no longer play in current apps and who wants a smaller, future-proof copy. Read the caveats below before you start: some DVR-MS files carry broadcast copy protection that blocks re-encoding, and raw .av1 is a video-only stream.

How to Convert DVR to AV1

1. 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 the same settings.
2. Pick Your Quality Preset: Under Advanced Options, open File Compression and choose a Quality Preset — Very High is the recommended default, or pick Specific file size if you need to hit a size target.
3. Set Resolution (Optional): Leave Video resolution on Keep original to match the source, or pick a Preset Resolution to downscale; SD broadcast recordings gain nothing from upscaling.
4. 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.

Walk-through: Choosing Quality vs. File Size

DVR-MS recordings are MPEG-2 — an old, inefficient codec — so AV1 can shrink the same footage substantially at matching visual quality. The trade-off you control lives in the File Compression group:

• Want the best-looking result: keep the Quality Preset on Very High (constant-quality encoding). AV1 decides the bitrate per scene; you don't set a size.
• Want a predictable size: switch to Specific file size and enter a target, or use Constant Bitrate / Variable Bitrate to cap the rate directly.
• Want it to encode faster or fit a small device: drop the preset a notch (High or Medium) and/or pick a lower Preset Resolution. AV1 is slow to encode, and dropping from Very High meaningfully cuts encode time.
• Trimming dead air: broadcast captures often have padding at the head and tail. Use the Trim control's Time Range to set a start and duration and cut it before encoding.

Because this is a re-encode of an already-compressed MPEG-2 source, expect some generation loss — AV1 cannot add detail the original SD broadcast never had. The goal is a smaller, more compatible file, not a sharper one.

Common Errors and How to Fix Them

• "This recording is copy protected and can't be converted" — The broadcaster set a copy-protection flag on the recording. Per Microsoft's own documentation, protected Media Center content only plays back on the PC that recorded it, and re-encoders cannot strip that protection. Unprotected recordings convert normally.
• "My converted file has no sound" — Raw .av1 is a bare video-only elementary stream (OBU) with no audio track. If you need a playable file with sound, convert to AV1 inside a container instead — see DVR to MP4 or DVR to MKV.
• "The video looks soft or blocky" — The source is standard-definition MPEG-2; downscaling further or using a low Quality Preset compounds the softness. Keep resolution on Keep original and the preset on Very High.
• "Encoding is taking a long time" — AV1 is computationally heavy to encode, and DVR-MS recordings are often long. A lower Quality Preset trades a little quality for a faster encode.

When This Doesn't Work

If the recording is DRM-protected by the broadcaster (a common case for premium cable and some over-the-air captures), no online converter can re-encode it — the protection is enforced at the OS level and is only removable on the original Media Center PC. Likewise, a truncated or corrupted .dvr file from an interrupted recording may fail to open. For everyday playback with audio rather than a video-only stream, AV1-in-a-container (DVR to MP4) is the practical choice; reach for raw .av1 only when a downstream tool specifically wants the bare elementary stream.

Frequently Asked Questions

What is a .dvr (DVR-MS) file?

DVR-MS is Microsoft's recorded-TV format from Windows Media Center, introduced in the mid-2000s. It wraps MPEG-2 video and audio in an ASF-based container. It was superseded by the WTV format with the TV Pack 2008 update, and Windows Media Center itself was discontinued with Windows 10 in 2015 — which is why these files are hard to play today.

Will the converted AV1 file be smaller than the original DVR recording?

Usually, yes. DVR-MS uses MPEG-2, an old codec, while AV1 is far more efficient. In our testing, a typical SD MPEG-2 recording re-encoded to AV1 at the Very High preset comes out a fraction of the original size at comparable visual quality. Exact savings depend on the source bitrate and how much motion the footage contains.

Why won't some of my DVR-MS recordings convert?

They carry a broadcast copy-protection flag. Microsoft's documentation explains that protected Media Center recordings only play on the PC that recorded them, and conversion tools — including HandBrake — cannot remove that protection. Recordings without the flag convert without issue.

Does raw .av1 keep the audio from my recording?

No. A raw .av1 file is a video-only elementary stream with no audio. If you need sound, convert to AV1 packaged in a container such as MP4 or MKV, which carry both video and an Opus or AAC audio track.

Can I make the AV1 file a specific size?

Yes. In File Compression, choose Specific file size and enter your target, or use Constant Bitrate / Variable Bitrate to cap the rate. Quality Preset (Very High by default) lets AV1 pick the bitrate per scene instead, which gives the best quality but a less predictable size.

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.