Thanks Carl. Would the bottleneck by storage I/O or processing. In other words, would getting a faster SC Card improve things? I will test with lower resolution, maybe 720 instead of full HD. I have seen mention of hardware acceleration on Raspberry Pi, is that applicable to this situation, or is that about video playback?
I will compile the latest ffmpeg and see how that goes. Bruce Bruce On Wed, Oct 17, 2018 at 8:29 PM Carl Eugen Hoyos <[email protected]> wrote: > 2018-10-17 21:24 GMT+02:00, Bruce Diesel <[email protected]>: > > > The command is: > > ffmpeg -f v4l2 -i /dev/video0 -vf > > > drawtext="fontsize=20:fontfile=FreeSerif.ttf:textfile=/dev/shm/Sensors.txt: > > reload=1:x=(w-text_w)/2:y=(h-text_h)/2" test.mpg > > > > The output is: > > ffmpeg version 3.2.10-1~deb9u1+rpt2 Copyright (c) 2000-2018 the FFmpeg > > This is more than two years old and it is possible that current > FFmpeg git head contains more optimizations for arm (I don't > know). If they exist, they should make a measurable difference. > > In any case, don't expect miracles, there is nothing obviously > wrong with your command line, but you can always compare > with x264 ultrafast, it may be faster, I never tested. > > Carl Eugen > _______________________________________________ > ffmpeg-user mailing list > [email protected] > http://ffmpeg.org/mailman/listinfo/ffmpeg-user > > To unsubscribe, visit link above, or email > [email protected] with subject "unsubscribe". _______________________________________________ ffmpeg-user mailing list [email protected] http://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email [email protected] with subject "unsubscribe".
