[FFmpeg-user] audio and video sync problem

[Murat Maman]

Hi Carl,

Yesterday out of syn problem again occurred and i saved file where to my
disk, i saw that there is no out of sync problem. What does it mean, what
is the source of problem, am i have internet problem, why frame drop during
the broadcasting, is it rtmp problem.

regards,

Murat


On Fri, Jul 4, 2014 at 3:32 PM, Eugene Gekhter <egekhter at pixcel.com> wrote:

> Carl,
>
> Can you explain why sudo ffmpeg is a bad idea?
>
> Thx.
>
> Sent from my iPhone
>
> > On Jul 4, 2014, at 4:07 AM, Carl Eugen Hoyos <cehoyos at ag.or.at> wrote:
> >
> >> On Thursday 03 July 2014 10:10:39 am Murat Maman wrote:
> >>
> >> sudo ffmpeg -y -f mpegts -i 'udp://@
> >
> > Unrelated: I believe that everybody on this list agrees
> > that "sudo ffmpeg" is a very bad idea.
> >
> >> 00.00.00.00:1111?fifo_size=1000000&overrun_nonfatal=1 \
> >> -maxrate 2M -bufsize 2M \
> >> -af volume=1.1 \
> >> -strict experimental \
> >> -c:a libfaac -ar 22050 -ac 2 -b:a 64k \
> >> -vsync 1 -c:v libx264 -r 25 -vf yadif,scale=640:480 -aspect:v 16:9 -b:v
> >> 900k \
> >> -preset superfast -tune zerolatency -threads 8 -crf 25 \
> >> -map 0:0 -map 0:1 \
> >> -f flv 'rtmp://testt:testt@00.00.00.00:0000/live/1111'
> >
> > (Complete, uncut console output missing.)
> >
> > Why are you using -vsync 1?
> > Did you try -async 1?
> >
> > Am I correct that the problem is reproducible with file output
> > instead of network output?
> >
> > Is the problem reproducible if you save the udp stream to a file
> > (including the reception problems) and transcode the file with
> > FFmpeg?
> >
> > Carl Eugen
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> > ffmpeg-user at ffmpeg.org
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