: If you just need to "marry" an audio file to a video without re-encoding, MKVToolNix-GUI is often a faster, more flexible alternative that accepts most containers.
This avoids Avidemux’s external audio limitation completely.
: The Vorbis codec is generally only supported when re-encoding an existing track, not as a direct external input. avidemux.org Supported External Formats avidemux+cannot+use+that+file+as+audio+track
ffmpeg -i input.wav -vn -ar 44100 -ac 2 -b:a 192k output.mp3 Use code with caution. Alternative Workflow: Remuxing Outside of Avidemux
Drag and drop your problematic audio file into the Audacity window. Go to (or Export as WAV). : If you just need to "marry" an
Use Avidemux project settings correctly
Large or unusual metadata tags, especially at the very beginning of an MP3 file, can confuse Avidemux's audio detection routines. The program scans the beginning of a file (the first ~1 MB) for valid audio frame headers. If it encounters non-audio data (like a large image for album art or DJ software tags), it can misinterpret it as malformed audio data and reject the file. avidemux
Older versions of Avidemux have documented bugs that reject standard audio streams. Ensure you are running the most recent stable release or a development nightly build from the Avidemux Official Forum to take advantage of updated FFmpeg demuxer libraries. Cannot use mp3 as audio track - Avidemux.org
Once your audio file has been cleaned or converted into a native format ( .mp3 , .wav , or .aac ADTS), follow these steps to accurately map it to your video layout:
Fix: Convert your audio to first (Audacity or ffmpeg). Avidemux hates MP3/M4A as external tracks.