How to convert AVI to MP4
- Add your .AVI file - drop it in the box above or click to browse.
- Convert it to .MP4 in a few seconds.
- Download your new .MP4 file.
What to expect
- This conversion is a full re-encode: AVI stores DivX or Xvid video, which must be decoded and re-compressed to H.264 - streams cannot simply be copied.
- File size typically drops by 50-75%; H.264 compresses the same content far more efficiently than DivX or Xvid.
- Audio is also re-encoded from MP3 to AAC; at 128 kbit/s the difference is rarely audible.
Frequently asked questions
Will converting AVI to MP4 lose quality?
Yes, but the loss is small. Re-encoding from DivX/Xvid to H.264 adds a generation of compression; at HandBrake's default settings it is rarely visible on a screen.
Can I convert without re-encoding?
Only if the AVI already holds H.264 video and AAC audio - then FFmpeg can copy streams directly with
ffmpeg -i input.avi -c copy output.mp4. Most AVI files use DivX or Xvid, which requires a full re-encode.Why is the MP4 smaller than the AVI?
H.264 is far more efficient than the DivX or Xvid codecs most AVI files contain, so the same visual quality fits in a much smaller file.
Are subtitles carried over?
AVI does not support soft subtitle tracks, so there is usually nothing to transfer. If you have an external
.srt file, HandBrake can burn it into the video or add it as a subtitle track in the MP4.Programs that convert AVI: HandBrake · MyVideoConverter · Miro Video Converter · Nero Multimedia Suite · Adobe Premiere Pro · Aimersoft DRM Media Converter for Windows · Any DVD Converter · Any Video Converter FREE
