Avidemux+cannot+use+that+file+as+audio+track [patched] Link
If you want a shorter version for social media (e.g., Twitter/Mastodon):
Before adding the audio, change the way Avidemux handles audio decoding. Open Avidemux. Go to Audio > Select Track . Add the track.
Adding this ability to handle audio-only container files would require massive changes or a complete rewrite of Avidemux's core code, so it's not something you can expect in a simple update. Accepting this limitation is the first step to working effectively with the software. avidemux+cannot+use+that+file+as+audio+track
ffmpeg -i video.mp4 -i audio.wav -c:v copy -c:a aac output.mp4 : Keeps the video quality identical.
: Avidemux cannot use audio files already "wrapped" in a container like .m4a or .mp4 as an external track. It lacks the internal demuxers to strip these for external loading. If you want a shorter version for social media (e
The following table summarizes which audio formats are supported as raw streams and how to prepare them correctly.
With the fixes and tools outlined here—from a simple container extraction with FFmpeg to the robust reliability of MKVToolNix—you now have everything you need to troubleshoot this error and get back to editing your videos, with the perfect soundtrack in place. Add the track
The error message in Avidemux occurs because the software requires raw, un-containerized audio formats (such as standard .wav or raw .mp3 ) when adding an external audio track. It actively rejects files wrapped in media containers like .m4a , .flac , or .ogg , as well as files containing heavy metadata corruption.
When you try to add an external audio file, Avidemux isn't looking for a complete file. It's searching for a raw elementary audio stream. This means it needs the pure audio data, without being wrapped in a container format like MP4, MKV, or MOV. It expects to find the audio codec’s data directly, without any extra packaging. Audio streams stored in a container format, such as an .m4a file (which is an MP4 container for audio only), cause the error because Avidemux cannot interpret the container's structure to extract the audio stream. The software is essentially looking for the ingredient, not the complete meal in its packaging.
