What happens when you convert AVI to MP4
| Inside a typical AVI | MPEG-4 Part 2 (DivX/Xvid) or Motion JPEG video with MP3 or AC-3 audio |
|---|---|
| Copy without re-encoding | Sometimes: it depends on the codec inside your file, and Smart mode checks this automatically |
| When re-encoded | H.264 video with AAC audio |
| Opens in | every phone, browser, TV, editor and social network |
Sizes are typical values; your files will vary with content and settings.
AVI Audio Video Interleave
AVI is Microsoft's 1992 video container. It is still found in old camera footage, DVD rips and legacy Windows software.
AVI converterMP4 MPEG-4 Part 14
MP4 is the universal video container. With H.264 video and AAC audio it plays on every phone, browser, smart TV and social network, which makes it the safest choice for sharing.
MP4 converterHow to use the AVI to MP4 Converter
- 1
Choose a AVI file or drop it onto the page.
- 2
Review the video options. The defaults suit most files.
- 3
Click Convert and download your MP4 when processing finishes.
Why convert AVI to MP4?
AVI files come from older cameras, Windows video software and archives from the 2000s. Files are large, streaming support is poor and browsers cannot play it. Choose MP4 to upload to social media, send in a chat app or play on any phone and TV.
Frequently asked questions
Will the MP4 lose quality?
Both formats are lossy, so converting re-encodes the data once more. Using a high quality setting keeps the generational loss very small. Avoid converting the same file back and forth repeatedly.
Does converting AVI to MP4 re-encode the video?
Sometimes: it depends on the codec inside your file, and Smart mode checks this automatically. A typical AVI contains MPEG-4 Part 2 (DivX/Xvid) or Motion JPEG video with MP3 or AC-3 audio. Otherwise the result is H.264 with AAC audio.
Questions about privacy, file-size limits or conversion speed are answered in the general FAQ.