Hi -
> lav2yuv coda_sound.avi | yuvscaler -O DVD | yuvdenoise | mpeg2enc -f 9 -b 4500
> - -q 7 -4 1 -2 1 -o coda.m2v
>
> which I changed to
>
> lav2yuv coda_sound.avi | yuvscaler -O DVD | yuvdenoise | mpeg2enc -f 8 -q 7 -o
> coda.m2v
>
> but the result is still a stuttering file. Do I need a -b setting back in?
No, the only difference that the '-b' makes is to set the bitrate -
without it mpeg2enc is using 7500 as the default bitrate.
> Steven, the mp2 file plays fine in any player you give it. It's only when
> it's mplexed into an mpg that there is a problem. When I created the same
> file in SVCD format it played well there, too.
>
I'm running out of ideas to try. If the cpu isn't fast enough to
do both the video and audio decoding that might be the problem. Just
playing a .mp2 file with an audio player doesn't have the timing
requirements that playing synchronized audio + video has.
Stuttering/shaking video is a symptom of the field order being
incorrect - but can that also affect the audio? I didn't think it
had an effect on the audio playing. Sounds like the movie
player is having to cut short the playing of parts of the audio because
it's time to start the next portion of movie - stopping/starting the
audio like that would be a stuttering effect. And at higher video
(DVD) bitrates the effect would be more likely to happen than at
the lower (SVCD) bitrate. Almost sounds like the system isn't fast
enough (for whatever reason) to play more than ~2500kbit/sec video
and audio in sync. At 4500 and higher the video decoding is taking
more cpu time and throwing the audio timing off.
Steven Schultz
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