Hi,
If I try :
cat stream.yuv | yuvdenoise -F -f | yuvfps -r 30000:1001 | mpeg2enc -f 8 -q 7
-4 1 -2 1 -P -I 0 -N -o svcd_stream.m2v
I get a very very long stream that plays very slowly each frame in the
original lasts several seconds. The ration seems to be being misunderstood.
I'm converting using-r instead of -c because the frame rate (reported by
mplayer) is 59.94. If I just put this through assuming its a 29fps stream it
plays at half speed.
Any ideas on the yuvfps option ?
Thanks,
Stuart
On Tuesday 27 May 2003 21:54, Selva Nair wrote:
> > HI,
> >
> > Sorry for the confused options. Its the effect of a weekend tweeking. I
> > switched to the options I use for encoding my video camera to DVD.
> >
> > mplayer -vo yuv4mpeg -ao pcm long.mpg
> > cat audiodump.wav | mp2enc -r 48000 -o mpegsoundfile
> > cat stream.yuv | yuvdenoise -F -f | yuvfps -r 30:1 | mpeg2enc -f 8 -q 7
> > -4 1 -2 1 -P -I 0 -N -o svcd_stream.m2v
>
> Why do you change the frame rate to 30:1 ? If your input is ntsc (frame
> rate = 30000:1001 = 29.97..), that change will definitely lead to audio
> delay - a drift of 1 msec per second; at that rate you will start noticing
> lip sync problem by atleast 100 seconds or so into video.
>
> If you are trying to over-write the 29.97... frame rate put out by
> mplayer's yuv4mpeg plugin, try using the -c option of yuvfps. Be sure
> to specify the rate as 30000:1001
>
> > mplex -f 8 mpegsoundfile svcd_stream.m2v -o long.conv.mpg
> >
> > The audio sync problem is still there, although less pronounced. Its
> > fine up to this point and then over about 30 seconds it drifts.
> >
> > It all plays fine on mplayer from the original captured using GATOS.
> >
> >
> >
> > Any other ideas ?
>
> Can't think of anything else..
>
> Selva
>
>
>
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