AVI to MP4 with FFmpeg — DivX/Xvid/MJPEG to H.264/AAC
Convert old AVI files (DivX, Xvid, MJPEG, MP3 audio) to MP4 with FFmpeg. Re-encode to H.264/AAC with CRF, learn when stream-copy works versus when you must re-encode, add faststart for web playback, plus troubleshooting and FAQ.
June 27, 2026
