[Libav-user] bug report: avcodec_decode_video2 & pthreads

[Ben Mesander]

Also I should note the multithreaded decode of h.264 never fails. I have
only seen it for png files on "some" machines.

Regards,
Ben
On Oct 13, 2014 11:10 AM, "wm4" <nfxjfg at googlemail.com> wrote:

> On Mon, 13 Oct 2014 17:02:09 +0000 (UTC)
> Carl Eugen Hoyos <cehoyos at ag.or.at> wrote:
>
> > Ben Mesander <ben at ...> writes:
> >
> > >   If the underlying ffmpeg library is compiled withe
> > > --disable-pthreads the code always works correctly. If
> > > that is not the case, sometimes avcodec_decode_video2()
> > > returns the number of bytes in the PNG, but does not
> > > set the frame complete flag to true.
> >
> > The decoder (luckily!) supports multi-threading. If you
> > don't like it (you just have to call avcodec_decode_video2()
> > iirc), just set the thread count to 1 before opening the
> > decoder.
>
> Well, duh, he's reporting a bug with it, not that he doesn't like it.
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