[FFmpeg-user] Dropping frames on simple split and recombine.

[Scott Chamberlain]

Both the top and the bottom to count all the way to 14:29.

On Tue, Sep 15, 2015 at 8:03 AM, Paul B Mahol <onemda at gmail.com> wrote:

> On 9/15/15, Scott Chamberlain <leftler at gmail.com> wrote:
> > On Mon, Sep 14, 2015 at 4:45 PM, Carl Eugen Hoyos <cehoyos at ag.or.at>
> wrote:
> >>
> >>
> >> Then please use the fifo filter.
> >>
> >> Carl Eugen
> >>
> >
> > I guess I do not understand how to use the filter correctly.
> >
> > If I try
> >
> >
> split[original],select='1+gt(t,5)+gt(t,10)':n=3[v1][v2][v3];[v1]setpts=PTS-STARTPTS[v1o];[v2]setpts=PTS-STARTPTS[v2o];[v3]setpts=PTS-STARTPTS[v3o];[v1o][v2o][v3o]concat=n=3,fifo[modified];[original][modified]vstack
> >
> > it gives me the warning
> >
> > [Parsed_vstack_7 @ 0000000002414c60] [framesync @ 0000000002338b28]
> Buffer
> > queue overflow, dropping.
> >
> > And my output video freezes the top timer at 7:03 like before and the
> > bottom timer now freezes at 4:29. (See Out1.mp4)
> >
> >
> > If I try
> >
> >
> split[original],select='1+gt(t,5)+gt(t,10)':n=3[v1][v2][v3];[v1]setpts=PTS-STARTPTS[v1o];[v2]setpts=PTS-STARTPTS[v2o];[v3]setpts=PTS-STARTPTS[v3o];[v1o][v2o][v3o]concat=n=3[modified];[original]fifo,[modified]vstack
> >
> > it gives me the warning
> >
> > [Parsed_vstack_7 @ 00000000025145c0] [framesync @ 0000000002438928]
> Buffer
> > queue overflow, dropping.
> >
> > And my output video freezes the top timer at 7:03 and the bottom timer
> > counts all the way to the end, the same behavior as Out.mp4 from my
> > original email.
> >
> >
> > If I try
> >
> >
> split[original],select='1+gt(t,5)+gt(t,10)':n=3[v1][v2][v3];[v1]setpts=PTS-STARTPTS[v1o];[v2]setpts=PTS-STARTPTS[v2o];[v3]setpts=PTS-STARTPTS[v3o];[v1o][v2o][v3o]concat=n=3,fifo[modified];[original]fifo,[modified]vstack
> >
> > It gives me no warnings but in the output video the top timer freezes at
> > 4:09 and the bottom timer counts all the way to the end (see Out3.mp4).
>
> And you expect what instead?
>
> >
> >
> > What is the proper way to use fifo to fix my issue?
> >
> > On Mon, Sep 14, 2015 at 4:45 PM, Carl Eugen Hoyos <cehoyos at ag.or.at>
> wrote:
> >
> >> Scott Chamberlain <leftler <at> gmail.com> writes:
> >>
> >> > I during the processing I get the warnings:
> >> >
> >> > [Parsed_vstack_6  <at>  0000000000d5ee60]
> >> > [framesync  <at>  0000000000c77cc8] Buffer
> >> > queue overflow, dropping.
> >>
> >> Then please use the fifo filter.
> >>
> >> Carl Eugen
> >>
> >> _______________________________________________
> >> ffmpeg-user mailing list
> >> ffmpeg-user at ffmpeg.org
> >> http://ffmpeg.org/mailman/listinfo/ffmpeg-user
> >>
> >
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