naz@naz-msi:~$ ffmpeg -v verbose -f v4l2 -video_size 3840x2160 -framerate 24 -i /dev/video1 -c:v rawvideo -f xv -
[video4linux2,v4l2 @ 0x558f08955500] fd:3 capabilities:84200001
[video4linux2,v4l2 @ 0x558f08955500] Dequeued v4l2 buffer contains corrupted data (0 bytes).
Input #0, video4linux2,v4l2, from '/dev/video1':
  Duration: N/A, start: 0.000000, bitrate: 2388787 kb/s
    Stream #0:0: Video: rawvideo, 1 reference frame (I420 / 0x30323449), yuv420p, 3840x2160, 2388787 kb/s, 24 fps, 24 tbr, 1000k tbn, 1000k tbc
Stream mapping:
  Stream #0:0 -> #0:0 (rawvideo (native) -> rawvideo (native))
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[video4linux2,v4l2 @ 0x558f08955500] Dequeued v4l2 buffer contains corrupted data (0 bytes).
    Last message repeated 30 times
[graph 0 input from stream 0:0 @ 0x558f0895df80] w:3840 h:2160 pixfmt:yuv420p tb:1/1000000 fr:24/1 sar:0/1 sws_param:flags=2
Output #0, xv, to 'pipe:':
  Metadata:
    encoder         : Lavf57.83.100
    Stream #0:0: Video: rawvideo, 1 reference frame (I420 / 0x30323449), yuv420p, 3840x2160, q=2-31, 2388787 kb/s, 24 fps, 24 tbn, 24 tbc
    Metadata:
      encoder         : Lavc57.107.100 rawvideo
frame=  228 fps= 24 q=-0.0 Lsize=N/A time=20:26:49.62 bitrate=N/A speed=7.7e+03x