Choose or MP3 as your export format.

Avidemux, like many editors, works best with Constant Bitrate (CBR) audio. VBR files can cause synchronization issues or fail to load entirely.

While the "Avidemux cannot use that file as audio track" error is common, it's rarely a dead-end. By understanding that Avidemux requires raw, container-free audio streams, you can almost always resolve the issue. Start with the quick diagnostic checklist to identify the most likely cause based on your file type. For a reliable fix, convert your audio using the FFmpeg method to extract the raw stream, or use Audacity to create a 16-bit WAV file. If you're not tied to using Avidemux for muxing, MKVToolNix provides an exceptionally easy alternative that bypasses the error entirely.

: Certain open-source raw formats, such as .ogg (Vorbis), are only supported when re-encoding an existing track, not when importing a new external one.

Drag and drop your problematic audio file ( .m4a , .mp3 , .ogg , or .flac ) into the window. Click > Export Audio . Set the export format dropdown menu to WAV (Microsoft) . Save the file. Open your video inside Avidemux. Select Audio from the top menu bar > Select Track .

The clock in Elias’s studio ticked toward 3:00 AM, the rhythmic sound mockingly keeping pace with the pulsing vein in his temple. He was one click away from finishing The Silent Echo , a documentary three years in the making. All he needed to do was mux the final, remastered orchestral score into the video container.

To resolve this, you must provide Avidemux with a compatible raw audio format. 1. Convert to a Supported Raw Format

: While it supports common formats like WAV (16/24-bit) , MP2 , MP3 , AC3 , and DTS , it may struggle with certain AAC encodings unless they are in an ADTS or LATM envelope.

Run the following command in your terminal or command prompt: ffmpeg -i input_audio.m4a -c:a copy clean_audio.aac

– you may have accidentally chosen a video file as the audio source

Drag and drop your problematic audio file into the Audacity window. Go to (or Export as WAV).

In the tracks panel, uncheck the video file's original audio track.