[FFmpeg-user] Set keyframe interval raw video
anatol2002 at gmail.com
Wed Oct 26 07:50:54 EEST 2016
On Thu, Oct 20, 2016 at 12:13 PM, Carl Eugen Hoyos <ceffmpeg at gmail.com>
> 2016-10-20 10:38 GMT+02:00 Gabor Alsecz <alseczg at gmail.com>:
> > Dear All,
> > Would like to know what is the best way/parameter to force key frame
> > interval. I would need 2*FPS
> > I'm feeding FFmpeg's stdout with raw images at fps 25.
> > So far i have the following command:
> > ffmpeg -y -loglevel info -f lavfi -i aevalsrc=0 -f rawvideo -pix_fmt
> > rgb24 -video_size 1280x720 -framerate=25 -i "-" -f flv -acodec aac
> I don't think this is supposed to work.
> > h264_nvenc -profile:v high -vf "fps=25,format=yuv420p" -minrate 3000k
> Careful with the fps filter: If input fps == output fps, don't use it to be
> on the safe side.
> > -maxrate 3000k -bufsize 6000k output.mp4
> -g should set the keyframe interval.
> Carl Eugen
Why we should be careful with the fps filter?
What's wrong with it?
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