[FFmpeg-devel] [PATCH 8/8] ffmdec: don't seek back at EOF

Michael Niedermayer michaelni at gmx.at
Mon Mar 9 14:21:35 CET 2015

On Mon, Mar 09, 2015 at 12:27:15PM +0100, Andreas Cadhalpun wrote:
> On 09.03.2015 03:46, Michael Niedermayer wrote:
> >On Mon, Mar 09, 2015 at 12:05:31AM +0100, Andreas Cadhalpun wrote:
> >>Hi,
> >>
> >>I'm not sure what the purpose of this avio_seek was, but it can
> >>result in an endless loop. Maybe it always does.
> >
> >ffm files can be written to and read at the same time, they can act
> >as ring buffers so that data is written till the end and then
> >continues at the begin
> >i suspect this patch breaks that
> But if the file is not used as a ring buffer, it shouldn't play endlessly.


> Maybe one should add a check that the data at the beginning is
> actually different than the last time?

maybe reynaldo can comment on how to best detect the ring buffer use
i think it always involves ffserver currently unless iam missing
something. It would of course make sense to allow other applications
to use it too ...
maybe a simple AVOption flag could be used to enable it, not sure


Michael     GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB

I am the wisest man alive, for I know one thing, and that is that I know
nothing. -- Socrates
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