[FFmpeg-user] ffmpeg -f avfoundation HELL - please help!
barsnick at gmx.net
Tue Jan 3 20:01:35 EET 2017
On Tue, Jan 03, 2017 at 17:34:10 +0000, Demián Andrés Rodriguez wrote:
> I hardly believe my cpu cannot encode vp9 properly, since cpu does not go
> beyond 100% while using h264 uses more than 300% cpu.
Well, the performance numbers I quoted certainly show that. Perhaps
one of your components was compiled without assembly support, or you
need to enable threading for libvpx somehow or so... but as is, it's
> Also, h264 encoding produces a very good video output but audio stutters
> and is very unclear. There are gaps in the middle...
Does it encode at realtime, i.e. speed >= 1.0?
> Also, setting -video_size 480x240 seems to have no effect at all. How can I
> change output video size?
"-scale 480x240" or insert the scale filter: "-vf scale=480:240" (or
"-vf scale=480:-2". A smaller output should encode significantly
Before you don't achieve fps>=25/speed>=1.0, I believe we don't need to
further debug the audio issues. (I'm not ruling out that there are
further issues, I'm just trying to tell you what's obvious to me.)
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