[MPlayer-users] Audio AC3 Sync under windows (sigh!)

[Michele Costantino M Soccio]

Hi, I alreay talked about my problem.
If I encode a video with mencoder when I play it in windows (with all players!) and I try to seek to some position or go fast forward the video plays while the audio starts some second after.
I've already modified the mencoder.c file 

if(mux_a->h.dwSampleSize){
	    // CBR - copy 0.5 sec of audio
	    switch(mux_a->codec){
	    case ACODEC_COPY: // copy
		len=mux_a->wf->nAvgBytesPerSec/2;
		len/=mux_a->h.dwSampleSize;if(len<1) len=1;
		len*=mux_a->h.dwSampleSize;
		len=demux_read_data(sh_audio->ds,mux_a->buffer,len);
		break;

to

if(mux_a->h.dwSampleSize){
	    // CBR - copy 0.5 sec of audio
	    switch(mux_a->codec){
	    case ACODEC_COPY: // copy          
		len=mux_a->wf->nAvgBytesPerSec/12; //LOOK HERE!!
		len/=mux_a->h.dwSampleSize;if(len<1) len=1;
		len*=mux_a->h.dwSampleSize;
		len=demux_read_data(sh_audio->ds,mux_a->buffer,len);
		break;

in order to be able to listen to audio (if I just press play everything allright!).

Is there some options that can solve this problem or is this a bug (a windows bug, of course!).
thanks a lot
michele costantino


The attachment is the mencoder output


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-------------- next part --------------
I used
mencoder      -dvd 2 -dvd-device /music/tmp/amelie 
              -lavcopts vcodec=mpeg4:vbitrate=120:vpass=1: -ovc lavc -oac copy 
	      -vop crop=720:418:-1:-1, 
	      -o /music/tmp/trailers/trailers.avi -noskip -ss 10 -endpos 22



MEncoder CVS-020603-06:00-3.0.4 (C) 2000-2002 Arpad Gereoffy (see DOCS!)

CPU: Advanced Micro Devices Duron SF Spitfire (Family: 6, Stepping: 1)
CPUflags: Type: 6 MMX: 1 MMX2: 1 3DNow: 1 3DNow2: 1 SSE: 0 SSE2: 0
Reading /home/michele/.mplayer/codecs.conf: can't open '/home/michele/.mplayer/codecs.conf': No such file or directory
Reading /usr/local/share/mplayer/codecs.conf: 34 audio & 93 video codecs
File not found: 'frameno.avi'
font: can't open file: /home/michele/.mplayer/font/font.desc
font: can't open file: /usr/local/share/mplayer/font/font.desc
libdvdread: Device inaccessible, CSS authentication not available.
libdvdread: Using normal filesystem access.
Reading disc structure, please wait...
There are 4 titles on this DVD.
There are 6 chapters in this DVD title.
There are 1 angles in this DVD title.
DVD successfully opened!
success: format: 0  data: 0x0 - 0xC6FC800
Detected MPEG-PS file format!
VIDEO:  MPEG2  720x576  (aspect 2)  25.00 fps  11250.0 kbps (1406.2 kbyte/s)
[V] filefmt:2  fourcc:0x10000002  size:720x576  fps:25.00  ftime:=0.0400
Detected audio codec: [a52] drv:14 (AC3-liba52)
Opening audio decoder: [liba52] AC3-liba52
Using 3DNowEx optimized IMDCT transform
AC3: 2.0 (stereo)  48000 Hz  192.0 kbit/s
Using MMX optimized resampler
AUDIO: srate=48000  chans=2  bps=2  sfmt=0x10  ratio: 24000->192000
libavcodec: CPU flags: mmx mmxext 3dnow
Opening video filter: [expand=-1:-1:-1:-1:1]
Expand: -1 x -1, -1 ; -1  (-1=autodetect) osd: 1
Opening video filter: [crop=720:418:-1:-1]
Crop: 720 x 418, -1 ; -1
==========================================================================
Opening video decoder: [mpegpes] MPEG 1/2 Video passthrough
VDec: vo config request - 720 x 576 (preferred csp: Mpeg PES)  
Couldn't find matching colorspace - retrying with -vop scale...
Opening video filter: [scale]
Sorry, selected video_out device is incompatible with this codec.
VDecoder init failed :(
Opening video decoder: [libmpeg2] MPEG 1/2 Video decoder v2.0
libmpeg2: Using MMXEXT for IDCT transform
libmpeg2: Using MMXEXT for motion compensation
VDec: vo config request - 720 x 576 (preferred csp: Planar YV12)  
Movie-Aspect is 1.33:1 - prescaling to correct movie aspect.
videocodec: libavcodec (720x418 fourcc=58564944 [DIVX])
Detected video codec: [mpeg12] drv:1 (MPEG 1 or 2)
==========================================================================
audiocodec: framecopy (format=2000 chans=2 rate=48000 bits=16 bps=24000 sample=1)
Writing AVI header...
Pos:  22.0s    550f (11%)  12fps Trem:   5min  17mb  A-V:0.001 [567:192]]
Writing AVI index...
Fixup AVI header...

Video stream:  567.399 kbit/s  (70924 bps)  size: 1560346 bytes  22.000 secs  550 frames

Audio stream:  192.000 kbit/s  (24000 bps)  size: 540000 bytes  22.500 secs