Avidemux Cannot Use That File As Audio Track ⇒

Avidemux often rejects audio files (like AAC) that are still wrapped in an MP4 or M4A container when you try to use them as an external track. It prefers "raw" formats (like AAC in an ADTS/LATM envelope, WAV, or raw MP3). Traktor/Metadata Mess:

• Open Avidemux.
• Load your video file.
• Go to Audio > Audio Track and see if you can manually select or change the audio codec or settings.

ffmpeg -i input_audio.mp3 -acodec pcm_s16le -ar 48000 -ac 2 output.wav

• Solution: Try playing the audio file in another media player to see if it plays correctly. If not, you may need to find a replacement or repair it if possible.

• Avidemux Wiki – External Audio Tracks
• FFmpeg Documentation – Audio Resampling