When the metadata window pops up, click to wipe out all ID3v2 tags, album art, and software markers. Save the new file and load it back into Avidemux. Solution 3: Use MKVToolNix as an Alternative Muxer
In the section, uncheck the original audio track of the video, and make sure your new external audio track is checked. Click Start multiplexing at the bottom.
I can provide specific or command-line scripts tailored to your setup. Share public link
Ensure you are using the latest nightly build or stable release from the official Avidemux website 4. The "Dummy Video" Trick If you are trying to save
Ensure that you're using the latest version of Avidemux. Sometimes, updates can resolve issues like the "Cannot use that file as audio track" error. avidemux+cannot+use+that+file+as+audio+track
[Problem File: .m4a/.flac/.ogg] ──> [Audacity / Transcoder] ──> [Raw .wav File] ──> [Successful Avidemux Import] Method 2: Convert to Raw Audio via FFmpeg
: 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.
Here's some content related to the error "Avidemux: Cannot use that file as audio track":
Avidemux sometimes refuses standalone audio files but will gladly accept them if they are wrapped inside a video container. You can use a lightweight tool like to trick Avidemux: Download and open MKVToolNix GUI . Drag your source video file into the Source files box. Drag your external audio file into the same box. When the metadata window pops up, click to
ffmpeg -i input.m4a -c:a copy -bsf:a aac_adtstoasc output.aac Use code with caution. Import this new output.aac file directly into Avidemux. For Truncating MP3 Metadata Headers:
To simply replace the audio in a video file without re-encoding, you can use a command like this:
If Avidemux continues to fail, you can force the audio into the video container using this simple command (replace filenames accordingly):
Here’s a post you can use on forums like Reddit, VideoHelp, or Super User: Click Start multiplexing at the bottom
With trembling fingers, he loaded the stripped file. He clicked "Open."
Go to Audio → Main Track → External Track , then choose Copy or Convert to PCM (not “Copy” if using MP3/AAC externally).
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.
To prevent encountering "Cannot use that file as audio track" in the future: