“Avidemux is a picky eater,” the post read. “Sometimes it hates the metadata more than the data. If the header is bruised, the door stays locked.”
: If you must use AAC, use a tool like FFmpeg to extract it from its container into a raw ADTS stream before loading. Cannot use mp3 as audio track - avidemux.org avidemux+cannot+use+that+file+as+audio+track
: External tracks must generally be "raw" bitstreams. For example, while standard MP3s often work, AAC files must be in an ADTS- or LATM-encapsulated format, not a standard .m4a file. “Avidemux is a picky eater,” the post read
Even if your codec matches, the container (the file wrapper, e.g., .mp4 , .mkv , .avi ) might reject it. Cannot use mp3 as audio track - avidemux
: While Avidemux supports MP3 and AAC, specific variable bitrate (VBR) versions can cause failures.
New user getting "Cannot use that file as audio track" - avidemux.org