Convert XviD MPEG-4 Video (.xvid) to MPEG-4 Part 14 (.mp4) online for free. Fast, secure video conversion with no watermarks or registration.
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XviD is the open-source MPEG-4 Part 2 Advanced Simple Profile codec that defined an era of internet video distribution. Its name — DivX spelled backwards — is a deliberate nod to the proprietary codec it was created to replace through community-driven, GPL-licensed development. From approximately 2002 to 2008, XviD was the default choice of scene release groups who encoded DVD rips into 700 MB AVI files, a size calculated to fit perfectly on a single CD-R disc. This "one-CD rip" standard became the universal format for sharing movies across peer-to-peer networks, FTP sites, and Usenet.
MP4 (MPEG-4 Part 14) is the universal video container of the modern internet, supporting H.264, H.265, and AV1 video with AAC audio. Every smartphone, tablet, smart TV, game console, web browser, and streaming platform supports MP4 natively. Converting XviD to MP4 is the single most important migration step for anyone with a legacy XviD collection — it transforms obsolete scene-era files into the format the entire modern world expects.
XviD in AVI is effectively a dead format combination. No smartphone plays MPEG-4 Part 2 in AVI natively. No streaming platform accepts XviD uploads. No smart TV decodes AVI containers reliably. The AVI container itself lacks features that modern playback demands: no streaming-friendly moov atom, no chapter markers, no reliable subtitle embedding, and a 2-4 GB practical file size limit. MP4 with H.264 eliminates every single one of these limitations.
Beyond compatibility, H.264 is dramatically more efficient than MPEG-4 Part 2. A typical XviD scene release at 800-1200 kbps can be matched or exceeded in visual quality by H.264 at 500-800 kbps. This means your XviD collection can be re-encoded into smaller MP4 files that actually look better — modern compression science has advanced significantly since the XviD era.
FFmpeg decodes the XviD MPEG-4 Part 2 video using its native mpeg4 decoder (which handles both XviD and DivX streams identically at the bitstream level). The decoded frames are re-encoded using libx264 (H.264) or libx265 (H.265/HEVC) with configurable CRF quality targeting. Audio is transcoded from the typical scene release MP3 to AAC-LC. The MP4 container is written with moov atom at the front (faststart) for progressive web playback. Two-pass encoding is available for targeting specific file sizes.
XviD scene releases were typically 624x352 to 720x480 at 800-1500 kbps — DVD-quality video compressed to fit on a CD-R. H.264 at CRF 18-20 produces visually equivalent or superior output at 40-60% of the original XviD file size. H.265 pushes this further to 30-50% of the original size. The quality ceiling is ultimately limited by the XviD source — you cannot recover detail lost in the original MPEG-4 Part 2 encoding, but you can preserve it efficiently in a modern codec.
| Device | XviD | MP4 |
|---|---|---|
| Windows PC | Partial | Native |
| macOS | Partial | Native |
| iPhone/iPad | Partial | Native |
| Android | Partial | Native |
| Linux | Partial | Native |
| Web Browser | No |
Resolution: 1920x1080
Bitrate: 8-12 Mbps
H.264 recommended for fast processing
Resolution: 1080x1080
Bitrate: 3.5 Mbps
Square or 9:16 for Reels
Resolution: 1080x1920
Bitrate: 4 Mbps
9:16 vertical, under 60s ideal
Resolution: 1280x720
Bitrate: 5 Mbps
Under 140s, 512MB max
Resolution: 960x540
Bitrate: 2 Mbps
16MB limit for standard, 64MB for document
Resolution: 1280x720
Bitrate: 4 Mbps
XviD to MP4 is the definitive format migration for the open-source codec era — converting the community's video standard into the universal format that plays everywhere, streams anywhere, and compresses better than the original ever could.
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| Egenskap | XviD | MP4 |
|---|---|---|
| Fullt navn | XviD MPEG-4 Video | MPEG-4 Part 14 |
| Filendelse | .xvid | .mp4 |
| Best egnet for | Open source | Universal compatibility |