Hi, it's been a long time since Avidemux does not extract audio correctly when using the Frame rate filter.
Try extracting audio using "PAL to Film" filter from a 1 hour video. Result should be 62mn30sec (60mn x25/23.976) but the sound is cut after 60mn.
Does the AVIdemux log file something when the audio is extracting and that 60 minutes mark comes up?
Limitation of avidemux 2.5
Not so sure it has been lifted with 2.6
Same problem the other way round:
video fps set to 25 (source is 23.976)
audio filter set to "film to pal"):
Output audio stops 10mn before end of the video :-\
with 2.6 ?
Audio is extracted correctly with 2.6.