[FFmpeg-user] ffmpeg convert video to audio error

[steve at theturtleroom.com]

I first tried to convert an .mp4 into .m4a using the following command line:
 
ffmpeg -i input_file.mp4 -vn -c:a copy output_file.m4a 
However, it only converted the first 25 minutes of my 60+ minute file.
 
 
So, I then tried to convert from .mp4 to .mp3 using the following command line:
 
ffmpeg -i input_file.mp4 -vn -b:a 128k -c:a libmp3lame output_file.mp3 
However, I had the same result - only the first 25 minutes were converted. Any solutions or suggestions?
 
Steve Enders
Founder/Director

steve at theTurtleRoom.com
 
http://theTurtleRoom.com