[Cin] [spam?] Fixed typo in my x265-8/10/12 bit patchset, tried CineformHD encoder in ffmpeg.git

Georgy Salnikov sge at nmr.nioch.nsc.ru
Fri Aug 7 19:16:52 CEST 2020

On Thu, 6 Aug 2020, Andrew Randrianasulu via Cin wrote:

> It worked at around 7 fps for 1080p h264 source in RGBA-float project ...
> Decoding with mplayer was fine if I set CPU to on-demand performance,
> but just 4x 1.4Ghz of my AMD FX 4300  was not enough for single stream decode.
> This codec was rumored to be fast for both encode and decode, guess ffmpeg
> implementation not very fast yet ...

Mplayer can sometimes be too slow at decoding full HD H.264. I think,
because it is trying to visualize video with too much accuracy, while some
other players do it simpler (and therefore faster).

To me, sometimes the following options helped, mplayer was accelerated
without any visible degrade in quality:

mplayer -autosync 30
mplayer -lavdopts lowres=1
mplayer -lavdopts fast
mplayer -lavdopts skiploopfilter=nonkey

The latter option being perhaps most important, with it mplayer was
accelerated drastically on some video.

Somewhen I have seen also a strange video from some digital camera with the
usual 30 fps actual, but 1000 fps set in metadata. Mplayer tried to display
it at 1000 fps and came in nirvana... Then I tried to override fps, and it
went fine.

Georgy Salnikov
NMR Group
Novosibirsk Institute of Organic Chemistry
Lavrentjeva, 9, 630090 Novosibirsk, Russia
Phone   +7-383-3307864
Email   sge at nmr.nioch.nsc.ru

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