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With "sudo" it is working. pi@NanoPi-Duo2:~$ sudo ffmpeg -t 30 -f v4l2 -channel 0 -video_size 1280x720 -i /dev/video0 -pix_fmt nv12 -r 30 -b:v 512k -c:v cedrus264 test.mp4 ffmpeg version 2.3.git Copyright (c) 2000-2014 the FFmpeg developers built on Sep 6 2016 11:47:46 with gcc 5.2.1 (Ubun...
I have connected the "NanoPi Duo2" with the Camera "OV5640" and try to stream a video over the network or simply create a video-file for testing. (The OV5640 is the matching 5MP Camera Module for the NanoPi Duo2.) In the Wiki I got the information to use the Linux-3.4 image to ha...