[FFmpeg-devel] [PATCH] avdevice/lavfi: output wrapped AVFrames

[Michael Niedermayer]

On Sat, Jul 02, 2022 at 02:34:17PM +0200, Paul B Mahol wrote:
> On Sat, Jul 2, 2022 at 10:55 AM Michael Niedermayer <michael at niedermayer.cc>
> wrote:
> 
> > On Thu, Jun 30, 2022 at 05:22:06PM +0200, Timo Rothenpieler wrote:
> > > This avoids an extra copy of potentially quite big video frames.
> > > Instead of copying the entire frames data into a rawvideo packet it
> > > packs the frame into a wrapped avframe packet and passes it through
> > > as-is.
> > > Unfortunately, wrapped avframes are set up to be video frames, so the
> > > audio frames unfortunately continue to be copied.
> > >
> > > Additionally, this enabled passing through video frames that previously
> > > were impossible to process, like hardware frames or other special
> > > formats that couldn't be packed into a rawvideo packet.
> > > ---
> > >  libavdevice/lavfi.c                       | 87 +++++++++--------------
> > >  tests/ref/fate/filter-metadata-cropdetect |  3 +-
> > >  2 files changed, 36 insertions(+), 54 deletions(-)
> >
> > seems to get this stuck:
> > ./ffmpeg -f lavfi -i
> > 'amovie=fate-suite/wavpack/num_channels/eva_2.22_6.1_16bit-partial.wv,asplit=3[out1][a][b];
> > [a]showwaves=s=340x240,pad=iw:ih*2[waves];
> > [b]showspectrum=s=340x240[spectrum]; [waves][spectrum] overlay=0:h [out0]'
> >  file-waves.avi
> >
> > (stuck as in OOM killed)
> >
> 
> OOM killed or its is slow just because of showspectrum filter not
> supporting arbitrary sizes in realt time?.

OOM killed on system with 25gb available
it took a few seconds to get killed, i assume it needed some time to allocate enough.
that system has swap disabled

thx

[...]
-- 
Michael     GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB

While the State exists there can be no freedom; when there is freedom there
will be no State. -- Vladimir Lenin
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