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I am using raspberry pi-4 8GB to take input from a video device /dev/video0 and output it over a network rtp://192.168.10.10:6001 I am using following ffmpeg command ffmpeg -f v4l2 -i /dev/video0 -c:v h264 -f rtp "rtp://192.168.10.10:6001" but the issue is it uses 252% of the cpu and raspberry pi get is getting on fire. How can I solve it

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  • It's not using more CPU than you have, so don't worry, that's 252*"%"* of a possible 400*"%"* - the heat is probably because you don't have good cooling on the pi
    – Jaromanda X
    Commented Feb 26 at 9:31
  • Ok, I want to drop down the CPU consumption how can I?
    – Mubashir
    Commented Feb 26 at 14:45
  • @Mubahsir please do not add questions in comments ... edit your question instead
    – jsotola
    Commented Feb 26 at 16:59
  • Check the actual temperature w/ vcgencmd measure_temp. Throttling of the CPU to prevent overheat starts at 85° C, it will not destroy itself.
    – goldilocks ♦
    Commented Feb 26 at 17:20
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    Why do you want to reduce CPU usage - is there something that doesn't work?
    – Milliways
    Commented Feb 27 at 2:49

1 Answer 1

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Try using a hardware video encoder to lessen the load on the CPU. You can get a list of h264 encoders like this:

ffmpeg -v warning -encoders | grep 264

 V....D libx264              libx264 H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10 (codec h264)
 V....D libx264rgb           libx264 H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10 RGB (codec h264)
 V....D h264_nvenc           NVIDIA NVENC H.264 encoder (codec h264)
 V..... h264_omx             OpenMAX IL H.264 video encoder (codec h264)
 V..... h264_v4l2m2m         V4L2 mem2mem H.264 encoder wrapper (codec h264)
 V....D h264_vaapi           H.264/AVC (VAAPI) (codec h264)

I believe the h264_omx is the one implemented in hardware, so your command would look like:

ffmpeg ... -i /dev/video0 -c:v h264_omx ...
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