While not a direct cause of the error, large audio files or those whose length doesn't match the video can cause instability or issues during the final save process. One developer noted that the maximum audio probe size is 1 MiB, and ID3v2 tags can occupy up to 256 MiB. It is always easily possible to make detection fail with such a large tag at the head of the file. The best workflow is to ensure your raw audio file is the same length as your video before you even try to add it in Avidemux. While you can add an audio track of any length, mismatched lengths can lead to unpredictable results in the final exported video.
How to Fix the "Cannot Use That File as Audio Track" Error in Avidemux
If you want to append a complex audio file to your video without modifying or converting the audio stream, bypass Avidemux completely for the audio-adding stage. Download the open-source multiplexer MKVToolNix . avidemux+cannot+use+that+file+as+audio+track
Once you have this new file, open it in Avidemux to do your final edits.
You are trying to load a MP3 file into a project where Audio Output is set to "AAC" . Avidemux tries to copy the MP3 as AAC, which is impossible. Alternatively, you load a FLAC file when Audio Output is set to "Copy" while outputting to an MP4 container (which doesn’t support FLAC). While not a direct cause of the error,
Drag and drop your problematic audio file into the Audacity window. Go to (or Export as WAV).
Certain .mp3 or .ac3 files generated by third-party recording software feature non-standard variable bitrates (VBR) or damaged headers that crash the Avidemux import engine. 🛠️ How to Fix the Error (Step-by-Step) The best workflow is to ensure your raw
To resolve this, you must provide Avidemux with a compatible raw audio format. 1. Convert to a Supported Raw Format