: Audio tracks with variable bitrates change their data compression millisecond by millisecond. Avidemux struggles to map VBR audio onto fixed video frames externally, causing it to reject the file to prevent severe audio-video desynchronization.
Avidemux might have issues with certain sampling rates or bit depths.
Avidemux is a powerful, free video editor designed for simple cutting, filtering, and encoding tasks. It is popular for its ability to quickly remux (repackage) video and audio streams without needing to fully re-encode them. However, a common issue many users face—especially when trying to replace, add, or mix audio—is the frustrating error message: