MPEG to AV1 Converter

Converting MPEG to AV1: What This Tutorial Covers

This walkthrough is for anyone holding an old .mpeg clip — a DVD-era rip, a broadcast capture, or a 1990s/2000s camcorder export — who wants it smaller and ready for modern web or archival storage. MPEG is an MPEG program stream, usually MPEG-1 or MPEG-2 video with MP2 audio: a 1990s format with low compression efficiency. AV1 is the royalty-free codec the Alliance for Open Media finalized in June 2018, and it produces a far smaller file at the same visual quality. By the end you'll know which settings to pick, how to read the size-vs-quality controls, and where this conversion can't help you.

How to Convert MPEG to AV1

1. Upload Your MPEG File: Drag and drop, or click "Add Files," to load your .mpeg (or .mpg) clips. You can queue several at once and they'll convert with the same settings.
2. Pick a Quality Preset: The output is AV1, defaulting to the "Very High (Recommended)" Quality Preset. Under File Compression you can instead set a Specific file size, target a percentage of the original, or switch to Constant Quality to tune the size-vs-quality balance directly.
3. Resize or Trim (Optional): Leave Video resolution on "Keep original" for old footage, or use Preset Resolutions / Width × Height if you genuinely need a different frame size; use Trim → Time Range to keep only part of the clip.
4. Convert and Download: Click Convert. Files upload over an encrypted connection, are processed on our servers, and are deleted automatically after a few hours — no sign-up, no watermark, never shared.

Walk-through: Choosing the Right Quality Control

The default "Very High" Quality Preset is the simplest path and works well for most old clips. When you want more control, the File Compression section gives you four ways to steer the encode:

• If you want best quality and don't care about exact size: use Constant Quality. Lower numbers mean better quality and a larger file; this is the right mode for archiving an old clip you want to keep faithfully.
• If you have a hard size budget (e.g. it must fit an upload limit): use Specific file size and enter a target in MB — the encoder works back from there.
• If you just want it "a lot smaller": use the percentage-of-original option and pick something like 50%.
• Leave the resolution alone. Old MPEG-1 is frequently only 352×240 or 720×480. AV1 cannot add detail that was never captured, so upscaling just makes a bigger file of the same blurry picture.

Common Errors and How to Fix Them

• "The AV1 file won't play on my phone or TV" — Older devices have no AV1 decoder. Open it in VLC or MPV on a computer, or convert to a widely supported format like MPEG to MP4 with H.264 for those devices.
• "The conversion is taking a long time" — AV1 encoding is CPU-intensive by design; long clips and high quality settings take longer. This is normal. For a quick result rather than maximum compression, H.264 in MP4 encodes much faster.
• "The output looks the same as the original, just smaller" — That's expected and correct. AV1 preserves the source detail; it does not sharpen or upscale. The win is file size, not picture quality.
• "My old clip still looks soft or blocky" — That softness is baked into the MPEG-1/MPEG-2 source. Re-encoding to any codec keeps it; nothing on this page (or any converter) can recover discarded detail.

When This Doesn't Work

If your .mpeg is corrupted or only partially downloaded, the encode may fail or produce a truncated clip — re-export or re-acquire a clean source first. And if the footage has to play on legacy hardware (DVD players, older smart TVs, low-end phones with no AV1 decoder), AV1 is the wrong target entirely; choose MPEG to MP4 instead. AV1's strength is shrinking a clip for modern delivery and storage, not maximizing compatibility.

Frequently Asked Questions

How much smaller will the AV1 file be than my MPEG?

Usually dramatically smaller. MPEG-1 is a 1993 codec (ISO/IEC 11172) with very low efficiency by modern standards, so AV1 commonly produces files a fraction of the original size at comparable quality — AV1 is generally cited as roughly 30-50% more efficient than HEVC, and far more efficient than MPEG-1/MPEG-2. The exact ratio depends on the source bitrate, resolution, and content; flat or animated footage compresses better than grainy live action. In our testing, a short standard-definition MPEG-1 clip re-encoded to AV1 at the default Quality Preset dropped to roughly a quarter of its original size with no visible quality loss.

Why does AV1 encoding take so much longer than the original MPEG?

AV1 uses far more complex compression tools — large flexible block partitions, many intra-prediction modes, and refined motion estimation — to wring out every bit of redundancy. That analysis is CPU-intensive, so AV1 encodes run several times slower than legacy MPEG-1/MPEG-2. For a one-off archive it's usually worth the wait; if you need speed over size, H.264 in MP4 encodes much faster.

Which devices and browsers can actually play AV1?

Software playback is broad: VLC and MPV decode AV1, and so do current Chrome (70+), Firefox (67+), and Edge (121+), with Safari adding support from version 17. Hardware decoding is newer — Intel 11th-gen and Arc, NVIDIA RTX 30/40, AMD RDNA2+, Apple's A17 Pro and M3 chips (2023), and Snapdragon 8 Gen 2 handle AV1 in hardware. Older phones, TVs, and DVD-era players have no AV1 decoder at all, so on those you'll see nothing or a fallback.

Will the audio from my MPEG be kept?

Yes. The MPEG audio (typically MP2) is decoded and re-encoded — Opus by default for AV1 output, or AAC — and stays in sync with the video. At typical bitrates this is transparent for dialog and music, and it happens automatically as part of the conversion; there's no separate step.

Is AV1 really royalty-free, unlike MPEG?

Yes. AV1 was created by the Alliance for Open Media (Google, Netflix, Amazon, Microsoft, Mozilla, Apple and others) to be royalty-free for any use, including commercial and paid streaming. MPEG-1/MPEG-2 were covered by patent pools (now largely expired), whereas AV1 was royalty-free by design from day one — a major reason streaming platforms adopted it.

Can converting to AV1 make my old MPEG look better?

No. A format conversion can only preserve the detail already in the source; it cannot recover what the original MPEG compression discarded, and it never upscales. If the clip looks soft, blocky, or low-resolution, AV1 keeps it the same — just in a much smaller file. There is no quality-recovery in any converter, here or elsewhere.