if -c:v copy then not working drawtext!
only -c:v copy using the cpu usage 2-3% , it is working long ago
but now need use draw text on the video stream
so the drawtext re encoding do high cpu usage, I use the notebook (
thinkpad i5 3 generations) gpu is no to perfect :)
Robert
2019. 01. 30. 11:05 keltezéssel, Moritz Barsnick írta:
On Wed, Jan 30, 2019 at 07:47:24 +0100, frhun wrote:
so I try lot of ffmpeg switch
ffmpeg -r 25 -rtsp_transport tcp -i
rtsp://admin:1234@192.168.2.25/Streaming/Channels/1 -c:v libx264 -b:v 2M
-c:a copy -vf "[in]drawtext=fontfile='C\:\\Windows\\Fonts\\cour.ttf':
textfile='Z\:\\k\\v\\T_A\\P.txt': x=180: y=30: reload=1:
fontcolor=black: fontsize=50: box=1: boxborderw=5: boxcolor=red@0.8 ,
drawtext=fontfile='C\:\\Windows\\Fonts\\cour.ttf':
textfile='Z\:\\k\\v\\T_A\\F.txt': x=180: y=75: reload=1:
fontcolor=black: fontsize=50: box=1: boxborderw=5: boxcolor=white@0.8 ,
drawtext=fontfile='C\:\\Windows\\Fonts\\cour.ttf':
textfile='Z\:\\k\\v\\T_A\\O.txt': x=30: y=30: reload=1: fontcolor=black:
fontsize=60: box=1: boxborderw=5: boxcolor=aqua@0.8 ,
drawtext=fontfile='C\:\\Windows\\Fonts\\cour.ttf':
textfile='Z\:\\k\\v\\T_A\\M.txt': x=30: y=80: reload=1: fontcolor=black:
fontsize=47: box=1: boxborderw=5: boxcolor=yellow@0.8[out]" -preset
ultrafast -f flv rtmp://a.rtmp.youtube.com/live2/x-x-x-x
I fixed the rate, and the output bitrate , and -preset utltrafast set
cpu usage 50% down to 20% it is better but not enough
because i using 4 cameras, processor usage ~80% , I cooked my notebook...
How to go below cpu usage
How does this performance change if you omit all the filters, i.e. just
RTSP demuxing/decoding and re-encoding to YouTube? (In other words: Do
the filters "cook" your CPU, or is it the encoding?) Not with "-c:v
copy, as in your original e-mail.
If the encoding is the bottleneck, you should try using your GPU for
that.
Moritz
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