[FFmpeg-devel] [FFmpeg-cvslog] lavfi: make filter_frame non-recursive.

[Michael Niedermayer]

On Tue, Dec 20, 2016 at 12:33:41AM +0100, Michael Niedermayer wrote:
> On Mon, Dec 19, 2016 at 11:56:27PM +0100, Nicolas George wrote:
> > Le nonidi 29 frimaire, an CCXXV, Michael Niedermayer a écrit :
> > > i dont know if this is a bug or just somethig that by sheer bad luck
> > > becomes vissible after this but
> > > ./ffmpeg -i cvid/dday.mov -vframes 30  -vcodec huffyuv -y -acodec pcm_s16le out3b.avi ; md5sum out3b.avi
> > > gives different outputs from time to time
> > > needs threads on the encoder side, huffyuv, vframes (audio codec irrelevant)
> > > 
> > > difference in output files looks like this:
> > > valgrind shows nothing (but difference occurs under valgrind)
> > > should be here:
> > > http://samples.ffmpeg.org/V-codecs/CVID/grayscale/dday.mov
> > 
> > I know there are a few glitches that came through. I have started
> > working on fixing the worst one, it requires making buffersink aware of
> > EOF one step earlier.
> > 
> 
> > As for this one and the one you posted a few minutes ago: -vframes with
> > audio frames too is highly dependant on details of the filters
> > scheduling, and can change slightly under perfectly normal
> > circumstances, starting with threading.
> 
> heres another similar issue
> ./ffmpeg -i ~/tickets/860/jpeg2000.mov -vframes 3  -vcodec huffyuv -y test.avi
> 
> http://samples.ffmpeg.org/ffmpeg-bugs/trac/ticket860/jpeg2000.mov

(to clarify, the output of this one changes here between runs)

can some bitexact flag be used to eliminate these (admitably) rare
cases ?


[...]

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Michael     GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB

The greatest way to live with honor in this world is to be what we pretend
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