
VIDIOC_G_FMT, VIDIOC_S_FMT, VIDIOC_TRY_FMT
int ioctl(int fd, int request, struct v4l2_format *fmt);
fmt->pix.width
*33"4#%0%/
fmt->pix.height
*335/.#L+$G4/L'G%0%/
+H0<22323!0%%!%
L='(,''.A/.'.G%!%%2
%!
fmt->pix.pixelformat
007&)%H
V4L2_PIX_FMT_MJPEG –!0%%!='(,
V4L2_PIX_FMT_JPEG –%!%V4L2_PIX_FMT_MJPEG
V4L2_PIX_FMT_MP4V –'(,9.1!6%!
V4L2_PIX_FMT_H264 –A/.1!6%!
V4L2_PIX_FMT_MP42 –'.3!%!
V4L2_PIX_FMT_MPEG –'(,%0%!
V4L2_PIX_FMT_UYVY –-.12!E%
V4L2_PIX_FMT_YUYV T-.1!E%
V4L2_PIX_FMT_NV12 –-.#%!90!
V4L2_PIX_FMT_GREY –-9"%!0%6
+H%E112%2
fmt->pix.field
00!%H
$2V4L2_FIELD_NONE0%%%%3E
0%02!%%3%$2%!2!1%2
P333%%"6!"E%<03%!2
03%%1!$2%%%20C3"210
%!%2
$2V4L2_FIELD_INTERLACE001%"2E%2
0!%%!"3%!60022
0232%!22123221%
$2%%%20C3"210%!%2
$2V4L2_FIELD_ANY0%232!<13
2321
$2E!%""62;* ;*+$()'&$(
<%"
/
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