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Why setting -r 30 still gives fps=15 in ffmpeg?
command:
fmpeg -loglevel verbose -pixel_format mjpeg -s hd720 -r 30 -i /dev/video1 -f libx264 -preset ultrafast -tune zerolatency -crf 23 -f matroska tcp://192.168.1.43:5000
output:
frame=10497 fps= 15 q=22.0 Lsize= 253990kB time=00:11:39.76 bitrate=2973.4kbit
fps= 15 represents the encoding speed, not the output file framerate.
encoding speed --> number of frames encoded per second, If there are frame drops, you will see drop=X in your progress readout, Check the speed, if it's close to 1 then your device is only sending 15 fps.
– Gyan
Apr 16 '18 at 16:15
