2-pass XVID transcoding

[top_cat]

I'm trying to increase the quality of the xvid transcodes by using a 2-pass method.

have anyone else done this? Also does this code look like it will work

Code:

ffmpeg -i {SOURCE_FILE} -deinterlace -vcodec mpeg4 -g 240 -qscale 2 -croptop 0 -cropbottom 0 -aspect 16:9 -s 640x360 -passlogfile {LOG_FILE} -pass 1 -mbd 2 -vtag xvid -y -f avi NUL
ffmpeg -i {SOURCE_FILE} -deinterlace -vcodec mpeg4 -g 240 -b 1200k -croptop 0 -cropbottom 0 -aspect 16:9 -s 640x360 -passlogfile {LOG_FILE} -pass 2 -acodec mp3 -ab 128 -ac 2 -mbd 2 -vtag xvid -qmin 2 -async 1 -y -f avi {DEST_FILE}

Will using {LOG_FILE} work? or so I need to do something else?

Thanks,

[sub]

Will using {LOG_FILE} work? or so I need to do something else?

No. GB-PVR looks for {SOURCE_FILE} and {DEST_FILE} and replaces them with the appropriate values. It doesnt know anything about {LOG_FILE}.

[top_cat]

ok so is it possible to get GB-PVR to call FFMPEG twice?

for 2 pass encoding you need to call FFMPEG once to make the log file

cmd="-i {SOURCE_FILE} -deinterlace -vcodec mpeg4 -g 240 -qscale 2 -s 640x360 -passlogfile fftmp.log -pass 1 -mbd 2 -vtag xvid -an -y -f avi NUL"

and then once again to use the log file to create the .avi file. So the second command line would be

cmd="-i {SOURCE_FILE} -deinterlace -vcodec mpeg4 -g 240 -b 1200k -s 640x360 -passlogfile fftmp.log -pass 2 -acodec mp3 -ab 128 -ac 2 -mbd 2 -vtag xvid -qmin 2 -async 1 -y -f avi {DEST_FILE}" targetExtension=".avi"

Is it possible for GB-PVR to call FFMPEG twice?

[sub]

ok so is it possible to get GB-PVR to call FFMPEG twice?

No, that'd be your next problem.

You might be able to rig something up with the PostProcessing.bat file that is automatically run at the end of a transcode. You could try calling the second pass in there.

[-Oz-]

http://gbpvr.com/pmwiki/pmwiki.php/Utili...anscodeCut use that in postprocessing.bat

[pBS]

or make a batch file to do both things as one command from gbpvr..
you can insert the batch with: exe="file.bat" before your command line..
like:

Code:

<Conversion name="XviD" exe="test.bat" cmd="-y -i {SOURCE_FILE}  {DEST_FILE} etc. etc.... />

and put in the batch file the params you want...

just remember the current dir will be gbpvr\ but the batch file must reside in gbpvr\third party\
so it's like running gbpvr\third party\file.bat from gbpvr\