Use a dedicated audio editor like Audacity to trim or extend your audio file to exactly match the length of your video before you try to bring it into Avidemux.
I’m trying to replace or add an external audio track in Avidemux, but when I go to Audio → Select Track and choose my file (MP3 or M4A), I get the error:
The audio file is in a container or codec that Avidemux cannot parse (e.g., specialized FLAC, Vorbis, or proprietary formats).
This can occur if you've updated your operating system or the tools used to create the audio files. The specific way an audio file is encoded or tagged can change over time. In some cases, the audio detector in Avidemux might also incorrectly identify a file, like misinterpreting an AAC file as AC3. avidemux+cannot+use+that+file+as+audio+track
Once your file is converted or remuxed, follow these exact steps to add it to your video project without errors:
Avidemux sometimes fails if the audio sampling rate (e.g., 48000 Hz) doesn't play nice with the video's timeline: Resampling box and set it to
If your source is an AAC stream inside an M4A file, you must strip away the container to leave a raw ADTS-encapsulated stream. You can do this quickly using FFmpeg. Open your command line terminal (CMD or Terminal). Use a dedicated audio editor like Audacity to
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.
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.
If Avidemux simply won't cooperate, use a dedicated muxing tool like . Drag your video and your audio file into MKVToolNix. Uncheck the original audio and keep the new audio. Hit "Start multiplexing." The specific way an audio file is encoded
This error typically appears when you try to add an external audio file (e.g., MP3, AAC, AC3, WAV) to a video file via the menu.
If your audio is .mka or .ogg , try renaming it to .mp3 or .aac if it's encoded as such.
This will let others give a precise fix or a one-line ffmpeg command tailored to your file.
Fix for Avidemux error: "Cannot use that file as audio track"
"cannot use that file as audio track" typically occurs when attempting to add an external audio file that is in an unsupported container or format. This often happens with
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