Avidemux Cannot Use That File As Audio Track [better]

Convert your audio file to a WAV file with 16-bit PCM format.

On the left-hand sidebar, change "Audio Output" from to MP3 (lame) or AAC (lav) . avidemux cannot use that file as audio track

This error halts your workflow, but understanding why it appears is the first step to fixing it. Convert your audio file to a WAV file with 16-bit PCM format

Understanding why Avidemux throws this warning helps you avoid it in the future: avidemux cannot use that file as audio track

: Certain codecs, such as Vorbis or specific AAC variants in proprietary Apple formats, may not be supported for external insertion without first being re-encoded or extracted.

Once you have a compatible audio file, here is the correct procedure to add it to your video project: