The most reliable solution is to strip the containers and metadata using the open-source software Audacity. Cannot use mp3 as audio track - Avidemux.org
Avidemux has specific rules regarding raw audio streams. While it supports standard format configurations, raw or Vorbis (.ogg) streams are often not supported as external audio inputs because they require their own complex Ogg or Matroska container environments to behave predictably. Cannot use mp3 as audio track - Avidemux.org avidemux cannot use that file as audio track
of the external audio file and what Avidemux is prepared to mux into the video container Common Culprits Incompatible Containers: The most reliable solution is to strip the
The most frequent cause is trying to load an or AAC file extracted from a smartphone or music store. Avidemux expects raw audio streams for external tracks. Cannot use mp3 as audio track - Avidemux
This article breaks down exactly why this error happens and provides step-by-step methods to fix it. Why Does This Error Happen?
If an MP3 still fails, the file might have a large header. Community experts suggest that stripping the first few kilobytes of the file (which often contain non-standard metadata) can sometimes allow Avidemux to "see" the actual audio frames. Supported External Audio Tracks
Avidemux is designed to be a "linear" editor, meaning it prefers to process video and audio streams directly without re-encoding them whenever possible. Because of this, it is notoriously picky about the format of external audio files you try to import.