Hi all,

 

I am new to audio and video decoder, hence would appreciate some help in the beginning.

I have an mpg file which has both and audio and video stream encoded. I use libmpeg2 to decode the video and display it on the monitor. I also use libmad to play the audio.

when i decode the mpg file i store audio part of the mpg file in a separate file (for ex: audio.ma2). After mpg file decoding is over, i run madplay with the following options.

 

madplay -v /root/audio.ma2

 

I see the following error message on the screen.

 

MPEG Audio Decoder 0.15.2 (beta) - Copyright © 2000-2004 Robert Leslie et al.
error: frame 0: lost synchronization
 00:00:00 Layer II, 224 kbps, 44100 Hz, stereo, CRC
error: frame 3: lost synchronization
 00:00:00 Layer II, 224 kbps, 44100 Hz, stereo, CRC
error: frame 6: lost synchronization
 00:00:00 Layer II, 224 kbps, 44100 Hz, stereo, CRC
error: frame 9: lost synchronization
 00:00:00 Layer II, 224 kbps, 44100 Hz, stereo, CRC
error: frame 12: CRC check failed
 00:00:00 Layer II, 224 kbps, 44100 Hz, stereo, CRC
error: frame 14: lost synchronization
 00:00:00 Layer II, 224 kbps, 44100 Hz, stereo, CRC
error: frame 17: lost synchronization
 00:00:00 Layer II, 224 kbps, 44100 Hz, stereo, CRC
error: frame 20: lost synchronization
 00:00:00 Layer II, 224 kbps, 44100 Hz, stereo, CRC
error: frame 23: CRC check failed
 00:00:00 Layer II, 224 kbps, 44100 Hz, stereo, CRC
error: frame 25: lost synchronization
 00:00:00 Layer II, 224 kbps, 44100 Hz, stereo, CRC
error: frame 28: lost synchronization
 00:00:00 Layer II, 224 kbps, 44100 Hz, stereo, CRC
error: frame 31: lost synchronization
 00:00:00 Layer II, 224 kbps, 44100 Hz, stereo, CRC
error: frame 34: lost synchronization
 00:00:00 Layer II, 224 kbps, 44100 Hz, stereo, CRC
error: frame 36: lost synchronization
 00:00:01 Layer II, 224 kbps, 44100 Hz, stereo, CRC
error: frame 39: lost synchronization
 00:00:01 Layer II, 224 kbps, 44100 Hz, stereo, CRC

could anybody please tell me what could be the problem?

 

regards,

-onup