[MPlayer-users] SVCD video/audio out of synch

Max Hofer vir182 at yahoo.de
Wed Dec 11 21:46:03 CET 2002


i got a SVCD with which i have a problem.
the audio/video goes totaly out of synch.
top shows me a 45% idle CPU, so it should be able to
decode the movie. no frames are dropped.

i tried different video ouputs (mga/xmga/x11) and different audio 
ouputs (alsa,oss, sdl). the -nosond options does not change how
the video is played (a bit bumpy - but reasonable). i tried -framedrop 
option. no difference.

Comparing the -v output of a working SVCD file and the non working (NW)
file i found following differences:
the NW-file had a slightly higher average video bitrate, and a higher
auido bitrate (224 kbit).

Not working SVCD:
Searching for sequence header... OK!
VIDEO:  MPEG2  480x480  (aspect 2)  29.97 fps  3161.0 kbps (395.1 kbyte/s)
[V] filefmt:2  fourcc:0x10000002  size:480x480  fps:29.97  ftime:=0.0334
get_path('sub/') -> '/home/max/.mplayer/sub/'
==========================================================================
Opening audio decoder: [mp3lib] MPEG layer-2, layer-3
dec_audio: Allocating 4608 + 65536 = 70144 bytes for output buffer
mp3lib: made decode tables with MMX optimization
init layer2&3 finished, tables done
mp3lib: using MMX optimized decore!
MPEG 1.0, Layer II, 44100 Hz 192 kbit Stereo, BPF: 627
Channels: 2, copyright: No, original: No, CRC: No, emphasis: 0
AUDIO: 44100 Hz, 2 ch, 16 bit (0x10), ratio: 24000->176400 (192.0 kbit)
Selected audio codec: [mp3] afm:mp3lib (mp3lib MPEG layer-2, layer-3)
==========================================================================

Working SVCD:
Searching for sequence header... OK!
VIDEO:  MPEG2  480x480  (aspect 2)  29.97 fps  3150.0 kbps (393.8 kbyte/s)
[V] filefmt:2  fourcc:0x10000002  size:480x480  fps:29.97  ftime:=0.0334
get_path('sub/') -> '/home/max/.mplayer/sub/'
==========================================================================
Opening audio decoder: [mp3lib] MPEG layer-2, layer-3
dec_audio: Allocating 4608 + 65536 = 70144 bytes for output buffer
mp3lib: made decode tables with MMX optimization
init layer2&3 finished, tables done
mp3lib: using MMX optimized decore!
MPEG 1.0, Layer II, 44100 Hz 224 kbit Stereo, BPF: 731
Channels: 2, copyright: No, original: No, CRC: Yes, emphasis: 0
AUDIO: 44100 Hz, 2 ch, 16 bit (0x10), ratio: 28000->176400 (224.0 kbit)
Selected audio codec: [mp3] afm:mp3lib (mp3lib MPEG layer-2, layer-3)
==========================================================================

i read the FAQ, i read the docu, i read the manual. but i was not able to
fix the problem. can anyone give me a suggestion what else i could do?

mfg Vir

i attached my sytem info and the output from the player

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