DivX to RMVB Converter

DivX to RMVB — and Why MP4 Is Almost Always the Better Target

If you are converting a DivX file to RMVB, it is worth knowing what you are trading. DivX is an MPEG-4 Part 2 (ASP) video, usually in an AVI or .divx container — the same codec family as Xvid. RMVB is RealNetworks' RealMedia Variable Bitrate format, a container that was popular in the mid-2000s for small movie and TV downloads, especially in Asian markets. Both are legacy formats today, and RMVB is the more obsolete of the two: almost nothing modern plays a .rmvb file out of the box. Convert to RMVB only if a specific old player or workflow demands it — otherwise convert your DivX to MP4 instead.

DivX vs RMVB vs MP4

When RMVB Still Makes Sense

• You are feeding a specific legacy device, set-top box, or media library that only indexes .rmvb files.
• You are matching an existing RMVB archive so all files share one container.
• A community or workflow you cannot change still standardizes on RealMedia downloads.

Note that this converter encodes RealVideo RV10 or RV20 (both H.263-based) with RealAudio — there is no RV40 encoder available, so do not expect the newer H.264-era RealVideo here.

When to Convert to MP4 Instead

• You want the file to play on a phone, smart TV, browser, or game console without extra codecs.
• You care about quality per megabyte — H.264 in MP4 generally beats RealVideo RV10/RV20 at the same size.
• You plan to edit, upload, or share the video anywhere mainstream.

For almost every modern use, DivX to MP4 is the right move. If you already have RMVB files you need to play, convert RMVB to MP4 instead.

How to Convert DivX to RMVB

1. Upload Your DivX File: Drag and drop your .divx or .avi file onto the page, or click "Add Files." You can queue several files and convert them with one set of settings.
2. Pick a Quality Preset: Open Advanced Options and set the Quality Preset (Very High is the default) or switch to a Constant Bitrate or specific file size if you are targeting a size budget.
3. Set Resolution and Trim (Optional): Use the Video Resolution control to keep the original or pick a preset, and use Trim with a Time Range to export only part of the clip.
4. Convert and Download: Click Convert and download your RMVB file. No sign-up, no watermark. Files are uploaded over an encrypted connection, processed on our servers, and deleted automatically after a few hours.

Frequently Asked Questions

Is RMVB better than MP4 for saving space?

RMVB earned its reputation in the mid-2000s because variable bitrate let it shrink long videos while holding quality. Today H.264 in an MP4 matches or beats that quality per byte and plays on virtually everything, so the size advantage no longer outweighs RMVB's compatibility problems for most people.

Will I lose quality converting DivX to RMVB?

Yes, somewhat. This is a transcode from one lossy codec (MPEG-4 ASP) to another (RealVideo RV10/RV20), so the file is re-encoded and some detail is lost. Choosing a higher Quality Preset reduces visible loss but cannot recover what the original DivX already discarded.

What plays an RMVB file in 2025?

VLC Media Player opens RMVB on Windows, macOS, and Linux, and it is the most reliable choice. Legacy RealPlayer and a few older media players also work. Out of the box, iPhones, most Android phones, smart TVs, and game consoles do not — which is the main reason to prefer MP4.

Does the converter use RV40 or the newer RealVideo codecs?

No. The encoder produces RealVideo RV10 or RV20, both based on H.263, paired with RealAudio. There is no RV40 (H.264-era) encoder here. If you need a modern, widely playable codec, convert to MP4 (H.264) instead.

Will my audio track carry over?

Yes. The audio from your DivX file is re-encoded into a RealAudio track inside the RMVB container, so the converted file keeps sound. As with the video, the audio is re-compressed, so a higher quality setting preserves more fidelity.

How large a DivX file can I upload?

The practical limit is upload size and time rather than a fixed cap — very large files take longer to send over your connection. In our testing, a typical 700 MB DivX movie uploads and converts without issue; if you only need part of a long file, use the Trim control to cut it down before converting.

Should I just keep the file as DivX or convert it to MP4?

For long-term storage and playback, MP4 (H.264) is the safest target because it plays on nearly every device and editor. DivX is more widely supported than RMVB but is still legacy. Unless a specific tool requires RMVB, DivX to MP4 is the more future-proof choice.