To help tailor the best solution for your project, please let me know: What is your original audio file (MP3, WAV, M4A)? Did you download the audio file, or record it yourself?
ffmpeg -i input.mp3 -acodec pcm_s16le -f wav output.wav
Sometimes the issue isn't the file itself, but how Avidemux is trying to "package" it.
This is the most reliable solution. Convert your audio file into a raw, supported format using a tool like or Audacity .
Still failing?
Ensure that your audio file is in a compatible format. You can check the audio file format by:
If the video expects a certain frequency (like 48kHz) and the audio file is 44.1kHz, the "muxer" might fail to bridge the two.
Let’s walk through two real-world scenarios.
If you are trying to replace audio, make sure the new track is the same length as the video to avoid synchronization issues. Cannot use mp3 as audio track - avidemux.org
Here are some additional tips to help you work with audio files in Avidemux:
Method 1: Convert the Audio File to standard uncompressed WAV or CBR MP3