[MEncoder-users] Audio Sync issues

[Jeff Cranmer]

On Thu, 2011-09-15 at 20:13 -0400, Jeff Cranmer wrote:
> > >
> > > "C:\Bin\mencoder.exe" "E:\Rip\2011_9_13_14_7_47.TS" -o
> > "E:\Enc_Out\2011_9_13_14_7_47.avi"  -ovc x264 -x264encopts
> > threads=0:bframes=5:b-adapt=2:partitions=all:cabac:nopsnr:nossim:mixed_refs:frameref=6:weight_b:b_pyramid=normal:me=umh:merange=16:subme=6:analyse=all:8x8dct=1:trellis=2:psy-rd=1,1:no-fast-pskip=1:crf=23
> > -oac copy -vf tinterlace=4,filmdint=io=30:24/fast=0,crop=1184:720:34:0
> > -noskip -fps 60000/1001 -ofps 24000/1001
> > 
> > I have done hundreds like this. Note
> > 
> > tinterlace=4,filmdint=io=30:24/fast=0
> > 
> > and
> > 
> > -noskip -fps 60000/1001 -ofps 24000/1001
> > 
> > The reason is that the PVR records at 59.94 and you want to reduce to
> > 23.976. Tinterlace does a great job.
> > 
> > I have zip sync problems.
> > 
> > (Substitute the x264 options for your DivX settings, of course)
> > 
> > I do it all the time.
> > 
> Thanks Rolf
> 
> I'm trying these options now.  I'm getting quite a few '@@@@@@@@
> Bottom-first field??? @@@@@@@@' errors during the encode.  Can I safely
> ignore these, or do I need to add another option to cure it?
> 
> Jeff
> 
> 
It's a lot closer, though the audio seems to be leading the video by a
small, but progressively increasing amount. 

Here's the revised command:
mencoder infile.mpg -noodml -ffourcc XVID -vf
scale=720:480,tinterlace=4,filmdint=io=30:24/fast=0 -aspect 16:9 -ovc
lavc -lavcopts
vcodec=mpeg4:threads=8:vbitrate=4000:cmp=2:subcmp=2:trell=yes:v4mv=yes:mbd=2:aspect=16/9:top=0 -oac pcm -channels 2 -noskip -fps 60000/1001 -ofps 24000/1001 -o outfile.avi 

This may be related to Andrew's earlier suggested solution.  I'm going
to re-add the -vf harddup option and see if that cures the remaining
sync issues.

Jeff