could not play the stream which are get from command bellow.

[andyliuliming]

ffmpeg -f v4l2 -framerate 15 -video_size 640x480 -input_format yuyv422 -an -i %s -c:v h264_omx -b:v 300k -an -profile:v baseline -level 3.0 -pix_fmt yuv420p -f rawvideo -"

is there a special requirement for the -level?

[131]

-i % ?, maybe you can give the full line & some output logs (write your stream in a file & link it here)