Hi,
I tried this and I still have the audio video sync problem over the
discontinuity. I have uploaded to users.jagunet.com/~stuhodg some example
files that show the video problems when mencoder is used:
cutfieforweb.mpg - origional video cut out with dd.
mencoderot.mpg - video output from mencoder -o /tmp/title2.avi -ofps 30 -ovc
lavc -lavcopts vcodec=mjpeg:vhq -oac pcm cutfieforweb.mpg
stream.yuv - video output from mplayer -vo yuv4mpeg -ao pcm cutfieforweb.mpg
mencoderconv.m2v - video from mencoder after converting thus :
lav2yuv /tmp/forweb/mencoderot.mpg | mpeg2enc -f 8 -o
/tmp/forweb/mencoderconv.m2v
mplayerconv.m2v - video from mplayer after converting thus :
cat /tmp/forweb/stream.yuv | yuvdenoise | /multimedia/raw/scriptfiles/yuvfps
-r 30:1 | yuvscaler -O SIZE_720x480 | mpeg2enc -F4 -f 8 -q 5 -4 1 -2 1 -P -N
-o /tmp/forweb/mplayerconv.m2v
I know I have more conversion in the mplayer convert, thats just my standard
line.
Any ideas ?
Thanks,
Stuart
On Friday 27 June 2003 09:32, Jonathan Bartlett wrote:
> Use the -benchmark flag to mplayer. This forces it to be non-realtime.
>
> Jon
>
> On Fri, 27 Jun 2003, Stuart Hodges wrote:
> > Hi,
> >
> > I have video captured by GATOS that I'm using MJPEGTOOLS to convert.
> >
> > When I use mplayer to split out the output into audio and video the
> > video and audio is fine, however if there are any discontinuity's in the
> > video and audio sync, it does not handle them and the video and audio get
> > out of sync.
> >
> > If I use mencoder to get the video into a state that MJPEGTOOLS can
> > handle it, the sync is file even over bad discontinuities, but the video
> > quality is very bad and I get very bad flickery effects when playing back
> > on the DVD (via TV), playing back using mplayer on the computer is fine.
> >
> > The commands I am using are:
> >
> > mencoder -o /tmp/title2.avi -ofps 30 -ovc lavc -lavcopts vcodec=mjpeg:vhq
> > -oac pcm /tmp/cutfile.1.mpg
> > lav2yuv /tmp/title2.avi | yuvdenoise |
> > /multimedia/raw/scriptfiles/yuvfps -c -r 30000:1001 | yuvscaler -O
> > SIZE_720x480 | mpeg2enc -z b -F4 -f 8 -q 5 -4 1 -2 1 -P -N -o
> > /tmp/video.1.m2v
> >
> > (I have to do the -ofps otherwise its not understood b lav2yuv)
> >
> > mplayer -vo yuv4mpeg -ao pcm cutfile.1.mpg
> > cat stream.yuv | yuvdenoise | /multimedia/raw/scriptfiles/yuvfps -r 30:1
> > | yuvscaler -O SIZE_720x480 | mpeg2enc -F4 -f 8 -q 5 -4 1 -2 1 -P -N -o
> > mplayer.m2v
> >
> > I have tried all the options on the HOWTO for this sort of thing,
> >
> > -T BOTT_FORWARD/TOP_FORWARD, -T LINE_SWITCH. , -z b|t If they do
> > anything they only make things worse.
> >
> > I hope to have some video cuts up on the web later.
> >
> > Any ideas ?
> >
> > Thanks,
> >
> > Stuart
> >
> >
> >
> >
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