How to obtain real-time streaming video of sensor video in real-time (node:/dev/video11) #92

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opened 2025-12-23 10:32:54 +01:00 by backuprepo · 1 comment

backuprepo commented

2025-12-23 10:32:54 +01:00

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Originally created by @bendanzhu520 on GitHub (Aug 23, 2024).

Hi @nyanmisaka
I am currently using the RK3588EVB development board for testing, using the command you provided:/ ffmpeg -f lavfi -i testsrc2=s=3840x2160,format=nv12 -c:v hevc_rkmpp -b:v 15M -minrate 10M -maxrate 20M -profile:v main -level 5.1 -g:v 100 -vframes 5000 -y /tmp/tmp.mp4
Save as MP4 video normal OK
I tried the following command:
./ffmpeg -f v4l2 -input_format nv12 -video_size 3840x2160 -framerate 30 -i /dev/video11 -c:v hevc_rkmpp -b:v 15M -minrate 10M -maxrate 20M -profile:v main -level 5.1 -g:v 100 -vframes 5000 -y /tmp/tmp.mp4
Print information: frame=4 fps=0.1 q=-0.0 Lsize=1552kB time=00:01:30.00 bitrate=141.3kbits/s dup=0 drop=1134 speed=2.37x
Discard many frames
For example, if I want to retrieve the video stream from the sensor and the node is/dev/video11, what is the command to retrieve the real-time video stream normally
thank you

Originally created by @bendanzhu520 on GitHub (Aug 23, 2024). Hi @nyanmisaka I am currently using the RK3588EVB development board for testing, using the command you provided:/ ffmpeg -f lavfi -i testsrc2=s=3840x2160,format=nv12 -c:v hevc_rkmpp -b:v 15M -minrate 10M -maxrate 20M -profile:v main -level 5.1 -g:v 100 -vframes 5000 -y /tmp/tmp.mp4 Save as MP4 video normal OK I tried the following command: ./ffmpeg -f v4l2 -input_format nv12 -video_size 3840x2160 -framerate 30 -i /dev/video11 -c:v hevc_rkmpp -b:v 15M -minrate 10M -maxrate 20M -profile:v main -level 5.1 -g:v 100 -vframes 5000 -y /tmp/tmp.mp4 Print information: frame=4 fps=0.1 q=-0.0 Lsize=1552kB time=00:01:30.00 bitrate=141.3kbits/s dup=0 drop=1134 speed=2.37x Discard many frames For example, if I want to retrieve the video stream from the sensor and the node is/dev/video11, what is the command to retrieve the real-time video stream normally thank you

backuprepo

2025-12-23 10:32:54 +01:00

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backuprepo commented

2025-12-23 10:32:55 +01:00

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@nyanmisaka commented on GitHub (Oct 28, 2024):

I'm not familiar with V4L2 input but your command looks OK. Please verify your command in the software encoder libx264 before trying the RKMPP hardware encoder.

@nyanmisaka commented on GitHub (Oct 28, 2024): I'm not familiar with V4L2 input but your command looks OK. Please verify your command in the software encoder libx264 before trying the RKMPP hardware encoder.