[MPlayer-users] Audio sync during encode

[Bradley Alexander]

I captured a couple of movies yesterday from TV that I was trying to
deinterlace and compress down to a 700MB file suitable for writing to a
CD-R.

The problem, which I have posted about before, is that the audio on the
final output is out of sync with the video. The machine is running
Debian/sid, and was freshly rebuilt two months ago, and I am using the
mencoder-k6 and mplayer-k6 debs (both 0.90rc2-0.0) from
marillat.free.fr.

I use the following steps in postprocessing:

Capture using vcr [audio synced]
Remove commercials using avidemux [audio synced]

mencoder $infile -ovc frameno -oac mp3lame -o frameno.avi

mencoder ${infile} -oac copy -ovc lavc -lavcopts
vcodec=mpeg4:vbitrate=${bitrate}:vhq:vqmin=1:vqmax=31:vpass=1 -vop pp lb
-o ${outfile}

mencoder ${infile} -oac copy -ovc lavc -lavcopts
vcodec=mpeg4:vbitrate=${bitrate}:vhq:vqmin=1:vqmax=31:vpass=2 -vop pp lb
-o ${outfile}

After pass 2, though the mplayer status display shows the audio is
synced, the actual audio is around 2-3 seconds off, and seems to vary
over the course of the movie, which is very distracting.

The last time I was able to successfully able to do this was with
0.90pre5. I am trying to compile pre5 from source, but apparently have
something missing, for in the make, I am getting

./darwinfixlib.sh mplayer.o mp_msg.o xacodec.o cpudetect.o codec-cfg.o
cfgparser.o my_profile.o spudec.o playtree.o playtreeparser.o
asxparser.o vobsub.o subreader.o find_sub.o lirc_mp.o mixer.o
mp-opt-reg.o dll_init.o loader/libloader.a loader/dshow/libDS_Filter.a 
libavcodec/libavcodec.a libmpdemux/libmpdemux.a
libmpcodecs/libmpcodecs.a libao2/libao2.a liba52/liba52.a
mp3lib/libMP3.a libmpeg2/libmpeg2.a linux/libosdep.a
postproc/libpostproc.a input/libinput.a libdha/libdha.so
vidix/libvidix.a libvo/libvo.a libmpdvdkit/libmpdvdkit.a
gcc -O4 -march=pentiumpro -mcpu=pentiumpro -pipe -ffast-math
-fomit-frame-pointer -D_REENTRANT -D_LARGEFILE_SOURCE
-D_FILE_OFFSET_BITS=64 -Ilibmpdemux -Iloader -Ilibvo   -o mplayer
mplayer.o mp_msg.o xacodec.o cpudetect.o codec-cfg.o cfgparser.o
my_profile.o spudec.o playtree.o playtreeparser.o asxparser.o vobsub.o
subreader.o find_sub.o lirc_mp.o mixer.o mp-opt-reg.o dll_init.o -Llibvo
-lvo  -Llibmpcodecs -lmpcodecs -Lmp3lib -lMP3 -Lliba52 -la52 -Llibmpeg2
-lmpeg2 -Llibavcodec -lavcodec  -Llibmpdemux -lmpdemux  -Linput -linput 
-Lloader -lloader -Lloader/dshow -lDS_Filter  -L/usr/lib -ldl -lartsc
-DPIC -fPIC -lpthread -laudio  -L/usr/X11R6/lib -lX11 -lXext -lnsl -lXt
-lmad    -Llibmpdvdkit -lmpdvdkit -lpthread -ldl -rdynamic  -Lpostproc
-lpostproc -ldivxdecore -Llinux -losdep -ltermcap  -lnsl -lz  -lpng -lz
-ljpeg -lgif -lm  -Llibao2 -lao2 -L/usr/X11R6/lib -lX11 -lXext -lnsl
-lGL -lXxf86dga -lXv -lXxf86vm -lXinerama -lmad -lnsl  -lggi  -L/usr/lib
-lSDL -lpthread -lvgagl -lvga -laa   -Lvidix -lvidix     
libao2/libao2.a(ao_nas.o)(.text+0x5a): In function `nas_readBuffer':
: undefined reference to `AuWriteElement'
libao2/libao2.a(ao_nas.o)(.text+0x73): In function `nas_readBuffer':
: undefined reference to `AuGetErrorText'
libao2/libao2.a(ao_nas.o)(.text+0xee): In function `nas_readBuffer':
: undefined reference to `AuPauseFlow'
libao2/libao2.a(ao_nas.o)(.text+0x107): In function `nas_readBuffer':
: undefined reference to `AuGetErrorText'
libao2/libao2.a(ao_nas.o)(.text+0x342): In function `init':
: undefined reference to `AuOpenServer'
libao2/libao2.a(ao_nas.o)(.text+0x3ac): In function `init':
: undefined reference to `AuCreateFlow'
libao2/libao2.a(ao_nas.o)(.text+0x3d9): In function `init':
: undefined reference to `AuCloseServer'
libao2/libao2.a(ao_nas.o)(.text+0x4b8): In function `init':
: undefined reference to `AuSetElements'
libao2/libao2.a(ao_nas.o)(.text+0x4d8): In function `init':
: undefined reference to `AuGetErrorText'
libao2/libao2.a(ao_nas.o)(.text+0x525): In function `init':
: undefined reference to `AuRegisterEventHandler'
libao2/libao2.a(ao_nas.o)(.text+0x53d): In function `init':
: undefined reference to `AuSetErrorHandler'
libao2/libao2.a(ao_nas.o)(.text+0x5c6): In function `uninit':
: undefined reference to `AuStopFlow'
libao2/libao2.a(ao_nas.o)(.text+0x5e6): In function `uninit':
: undefined reference to `AuGetErrorText'
libao2/libao2.a(ao_nas.o)(.text+0x624): In function `uninit':
: undefined reference to `AuCloseServer'
libao2/libao2.a(ao_nas.o)(.text+0x673): In function `play':
: undefined reference to `AuStartFlow'
libao2/libao2.a(ao_nas.o)(.text+0x693): In function `play':
: undefined reference to `AuGetErrorText'
libao2/libao2.a(ao_nas.o)(.text+0x6e8): In function `play':
: undefined reference to `AuDispatchEvent'
libao2/libao2.a(ao_nas.o)(.text+0x702): In function `play':
: undefined reference to `AuScanForTypedEvent'
libao2/libao2.a(ao_nas.o)(.text+0x80c): In function `reset':
: undefined reference to `AuStopFlow'
libao2/libao2.a(ao_nas.o)(.text+0x82c): In function `reset':
: undefined reference to `AuGetErrorText'
libao2/libao2.a(ao_nas.o)(.text+0x954): In function `audio_resume':
: undefined reference to `AuStartFlow'
libao2/libao2.a(ao_nas.o)(.text+0x974): In function `audio_resume':
: undefined reference to `AuGetErrorText'
libao2/libao2.a(ao_nas.o)(.text+0x9c8): In function
`nas_event_thread_start':
: undefined reference to `AuDispatchEvent'
libao2/libao2.a(ao_nas.o)(.text+0x9dd): In function
`nas_event_thread_start':
: undefined reference to `AuScanForTypedEvent'
libao2/libao2.a(ao_nas.o)(.text+0xa25): In function `nas_error_handler':
: undefined reference to `AuGetErrorText'
collect2: ld returned 1 exit status
make: *** [mplayer] Error 1

I have libao0 and libao2 installed as well as libao-dev...

Any ideas on either issue?

Regards,
-- 
--Brad
============================================================================
Bradley M. Alexander                |
Debian Developer, Security Engineer |   storm [at] tux.org
Debian/GNU Linux Developer          |   storm [at] debian.org
============================================================================
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============================================================================
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