Use AVI to MP4 - free
Frequently asked questions
Will the MP4 be smaller than the AVI?
Usually yes. AVI files often use older, less efficient codecs, so re-encoding to H.264 typically shrinks the file.
Does this work with any AVI file?
It works with standard AVI files. Very old or unusual codecs inside the AVI container may not decode correctly.
Is audio preserved?
Yes, the audio track is re-encoded to AAC alongside the video.