MPEG to DivX Converter

Converting MPEG to DivX: What This Tutorial Covers

You have an .mpeg program stream — MPEG-1 or MPEG-2 video with MP2 audio, off a DVD rip or an old capture — and something expects a DivX file. This tutorial covers the two things that surprise people here: what you download is AVI bytes under a .divx name, and the default compression setting aims above your source bitrate, so an untouched conversion often produces a larger file than you started with. Both are easy to work around once you know.

How to Convert MPEG to DivX

1. Upload Your MPEG File: Drag and drop your .mpeg or .mpg, or click "Add Files". Both extensions are accepted, and a batch converts with shared settings.
2. Choose a File Compression Mode: "File Compression" opens on "Quality Preset" with "Very High (Recommended)" selected. For a predictable result on DivX, switch to "Constraint Quality" or "Specific file size" instead — see the walk-through below for why.
3. Set Video Resolution and Trim (Optional): "Video resolution" starts on "Keep original". "Preset Resolutions" sets height with the width following the source aspect; "Width x Height" lets you set both. "Trim" takes a Start time and a Duration.
4. Convert and Download: Click Convert, then rename the download from .divx to .avi if your player is fussy. Files upload over an encrypted connection, are processed on our servers, and are deleted automatically after a few hours — no sign-up, no watermark.

Walk-through: Why the Default Preset Can Make the File Bigger

DivX is MPEG-4 Part 2 Advanced Simple Profile — our encoder for it is ffmpeg's mpeg4, and that codec has no CRF mode. That single fact drives everything odd about this page.

When a codec supports CRF, "Quality Preset" maps your chosen level to a quality target and the encoder finds whatever bitrate delivers it. When a codec does not, the preset falls back to scaling the source bitrate by a multiplier of 0.3 + (level × 1.2). The "Very High (Recommended)" level sits at 0.85 on that scale, so the target lands at 1.32× your source bitrate, with headroom above that for complex scenes. Feed it a high-bitrate DVD rip and you get a bigger file, not a smaller one — and no extra picture quality, because the detail was already lost in the MPEG-2 encode.

What to do instead:

• If you want it smaller: use "Specific file size" and name a target in MB, or "Variable Bitrate" and set an explicit average. Both give you a number you control.
• If you want quality-driven encoding: use "Constraint Quality", which pairs the quality number with a Max bitrate ceiling so the encode cannot run away.
• Mind the scale on the quality number. On DivX the field keeps its "CRF" label but drives a 1-31 qscale, where lower is better and the range is far more aggressive than x264's 0-51. An "18" or "23" typed from H.264 habit is not a mid-range choice here. Because two configuration contexts both apply to this page, we will not claim what the field opens on — type the value you intend rather than trusting the starting position.
• Lower the preset if you stay on Quality Preset. Medium and Low pull the multiplier below 1.0, which is where actual shrinking starts.

MPEG vs DivX at a Glance

Which Compression Mode to Use on DivX

Common Errors and How to Fix Them

• "The .divx file won't open" — Most players match on extension. The bytes are a standard AVI, so renaming the download to .avi fixes it immediately without re-converting.
• "The output is bigger than the source" — The "Very High" Quality Preset targeted 1.32× your source bitrate. Re-convert with "Specific file size", "Variable Bitrate", or a lower preset.
• "The video is fine but there's no sound on my player" — DivX output here carries MP3 audio. A few very old set-top decoders only handled MP2 or AC-3 in AVI. Check what your device documents, or convert to MPEG to AVI and pick an audio codec it lists.
• "The picture has comb lines during motion" — Interlaced DVD or broadcast source. We do not deinterlace anywhere, so the field combing is re-encoded as picture content. Deinterlace in a desktop editor before uploading.
• "My 16:9 rip is horizontally squashed" — Anamorphic source. Pixel aspect is normalised to square without correcting the display shape. Set "Width x Height" explicitly — for example 1024×576 for 16:9 PAL content.
• "The output dimensions are one pixel off what I typed" — MPEG-4 encoding requires even frame dimensions, so odd widths or heights are adjusted to the nearest even value.

When This Doesn't Work

DivX only makes sense when a specific device requires it. DivX's own certification page describes Home Theater as the standard-definition profile and lists MKV, AVI and DIVX as the container formats certified devices read — so if your target hardware predates that, check its manual for the resolution and bitrate ceiling it actually supports rather than guessing. And if there is no certified device in the picture at all, DivX is the wrong choice in 2026: MPEG to MP4 with H.264 compresses better, plays on essentially every phone, TV and browser, and needs no rename. Copy-protected or truncated program streams will fail here regardless of settings — repair or re-export the source first.

Frequently Asked Questions

Is a .divx file the same thing as an AVI?

Effectively, yes. DivX is a codec, not a container, so our pipeline writes an AVI and names it .divx to match the conversion you chose. The bytes are a standard AVI holding MPEG-4 ASP video and MP3 audio. Renaming the download to .avi changes nothing inside the file and immediately satisfies players that dispatch on extension. Certified DivX hardware reads the codec tag inside the file, so it plays either way.

Will converting MPEG to DivX improve the picture?

No. The MPEG source is already lossy, and re-encoding can only preserve what survived — it cannot undo MPEG-2 blocking, sharpen soft footage, or add resolution. What you gain is a codec that DivX-certified hardware is built to decode, and better compression efficiency than MPEG-1/MPEG-2 at the same perceived quality, meaning more runtime per disc.

Why won't my DivX player accept the original MPEG file?

A DivX logo certifies that the player's decoder was tested against DivX's flavour of MPEG-4 — it says nothing about MPEG-1 or MPEG-2 playback. An MPEG program stream is a different container carrying a different codec family, so a DivX-only device may refuse it outright or play video without sound. Re-encoding to MPEG-4 ASP with MP3 audio gives the player exactly what its certification covers.

What does the "CRF" number do on this page?

Not what the label implies. DivX has no CRF mode, so the field drives ffmpeg's qscale instead, on a 1-31 scale where lower is better — a much narrower and more aggressive range than the 0-51 CRF scale you may know from H.264. Values carried over from x264 habits land far lower in quality than expected. If you want a dependable result, use "Constraint Quality" and set the Max bitrate, or skip the quality number entirely and use "Specific file size".

Should I use DivX or Xvid?

They are close relatives — both are MPEG-4 Part 2 ASP implementations, and most certified players read either. DivX is the branded, certification-backed one, so if your device carries a DivX logo, match it. If you are just after an MPEG-4 ASP file in an AVI-style wrapper with no certification requirement, MPEG to Xvid is equivalent, and MPEG to AVI gives you a plainly-named AVI with no rename step at all.

Does the trim happen before or after the re-encode?

The Trim section takes a Start time and a Duration and the segment is encoded as the output — you are not encoding the whole file and cutting afterwards, so trimming a long DVD rip down first genuinely saves conversion time. If you need multiple non-contiguous segments, or a frame-accurate cut without re-encoding decisions, cut the source with /video-cutter first and convert the result here.

Can I keep the original resolution exactly as it is?

"Video resolution" starts on "Keep original", so yes — with one caveat. MPEG-4 encoding requires even frame dimensions, so a source with an odd width or height is adjusted by a pixel. Standard DVD and VCD frame sizes (720×576, 720×480, 352×288, 352×240) are already even and pass through untouched.

What happens to my files after conversion?

Your .mpeg uploads over an encrypted connection, converts on our servers, and both the upload and the generated .divx are deleted automatically after a few hours. There is no account, no watermark on the output, and files are never shared or made public. On a long DVD rip the upload is usually the slow part, so trimming first pays off twice.