Is it possible that this is a bug?
If I run 'v4l2-ctl --get-crop', then I don't get anything. Using
strace I got
:
:
mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) =
0xb7cb9000
set_thread_area({entry_number:-1 -> 6, base_addr:0xb7cb96c0, limit:1048575,
seg_32bit:1, contents:0, read_exec_only:0, limit_in_pages:1, seg_not_present:0,
useable:1}) = 0
mprotect(0xb7dfc000, 4096, PROT_READ) = 0
mprotect(0xb7f14000, 12288, PROT_READ) = 0
munmap(0xb7f1f000, 56457) = 0
brk(0) = 0x8063000
brk(0x8084000) = 0x8084000
open("/dev/video0", O_RDWR) = 3
ioctl(3, VIDIOC_QUERYCAP or VT_OPENQRY, 0xbfed3810) = 0
ioctl(3, MATROXFB_TVOQUERYCTRL or VIDIOC_QUERYCTRL, 0xbfed39b4) = 0
ioctl(3, MATROXFB_TVOQUERYCTRL or VIDIOC_QUERYCTRL, 0xbfed39b4) = 0
ioctl(3, MATROXFB_TVOQUERYCTRL or VIDIOC_QUERYCTRL, 0xbfed39b4) = 0
ioctl(3, MATROXFB_TVOQUERYCTRL or VIDIOC_QUERYCTRL, 0xbfed39b4) = 0
ioctl(3, MATROXFB_TVOQUERYCTRL or VIDIOC_QUERYCTRL, 0xbfed39b4) = 0
ioctl(3, MATROXFB_TVOQUERYCTRL or VIDIOC_QUERYCTRL, 0xbfed39b4) = 0
ioctl(3, MATROXFB_TVOQUERYCTRL or VIDIOC_QUERYCTRL, 0xbfed39b4) = 0
ioctl(3, MATROXFB_TVOQUERYCTRL or VIDIOC_QUERYCTRL, 0xbfed39b4) = 0
ioctl(3, MATROXFB_TVOQUERYCTRL or VIDIOC_QUERYCTRL, 0xbfed39b4) = 0
ioctl(3, MATROXFB_TVOQUERYCTRL or VIDIOC_QUERYCTRL, 0xbfed39b4) = 0
ioctl(3, MATROXFB_TVOQUERYCTRL or VIDIOC_QUERYCTRL, 0xbfed39b4) = 0
ioctl(3, MATROXFB_TVOQUERYCTRL or VIDIOC_QUERYCTRL, 0xbfed39b4) = 0
ioctl(3, MATROXFB_TVOQUERYCTRL or VIDIOC_QUERYCTRL, 0xbfed39b4) = 0
ioctl(3, MATROXFB_TVOQUERYCTRL or VIDIOC_QUERYCTRL, 0xbfed39b4) = 0
ioctl(3, MATROXFB_TVOQUERYCTRL or VIDIOC_QUERYCTRL, 0xbfed39b4) = 0
ioctl(3, MATROXFB_TVOQUERYCTRL or VIDIOC_QUERYCTRL, 0xbfed39b4) = 0
ioctl(3, MATROXFB_TVOQUERYCTRL or VIDIOC_QUERYCTRL, 0xbfed39b4) = 0
ioctl(3, MATROXFB_TVOQUERYCTRL or VIDIOC_QUERYCTRL, 0xbfed39b4) = 0
ioctl(3, MATROXFB_TVOQUERYCTRL or VIDIOC_QUERYCTRL, 0xbfed39b4) = 0
ioctl(3, MATROXFB_TVOQUERYCTRL or VIDIOC_QUERYCTRL, 0xbfed39b4) = 0
ioctl(3, MATROXFB_TVOQUERYCTRL or VIDIOC_QUERYCTRL, 0xbfed39b4) = 0
ioctl(3, MATROXFB_TVOQUERYCTRL or VIDIOC_QUERYCTRL, 0xbfed39b4) = 0
ioctl(3, MATROXFB_TVOQUERYCTRL or VIDIOC_QUERYCTRL, 0xbfed39b4) = 0
ioctl(3, MATROXFB_TVOQUERYCTRL or VIDIOC_QUERYCTRL, 0xbfed39b4) = 0
ioctl(3, MATROXFB_TVOQUERYCTRL or VIDIOC_QUERYCTRL, 0xbfed39b4) = 0
ioctl(3, MATROXFB_TVOQUERYCTRL or VIDIOC_QUERYCTRL, 0xbfed39b4) = 0
ioctl(3, MATROXFB_TVOQUERYCTRL or VIDIOC_QUERYCTRL, 0xbfed39b4) = 0
ioctl(3, MATROXFB_TVOQUERYCTRL or VIDIOC_QUERYCTRL, 0xbfed39b4) = 0
ioctl(3, MATROXFB_TVOQUERYCTRL or VIDIOC_QUERYCTRL, 0xbfed39b4) = 0
ioctl(3, MATROXFB_TVOQUERYCTRL or VIDIOC_QUERYCTRL, 0xbfed39b4) = 0
ioctl(3, MATROXFB_TVOQUERYCTRL or VIDIOC_QUERYCTRL, 0xbfed39b4) = 0
ioctl(3, MATROXFB_TVOQUERYCTRL or VIDIOC_QUERYCTRL, 0xbfed39b4) = 0
ioctl(3, MATROXFB_TVOQUERYCTRL or VIDIOC_QUERYCTRL, 0xbfed39b4) = 0
ioctl(3, MATROXFB_TVOQUERYCTRL or VIDIOC_QUERYCTRL, 0xbfed39b4) = 0
ioctl(3, MATROXFB_TVOQUERYCTRL or VIDIOC_QUERYCTRL, 0xbfed39b4) = 0
ioctl(3, MATROXFB_TVOQUERYCTRL or VIDIOC_QUERYCTRL, 0xbfed39b4) = 0
ioctl(3, MATROXFB_TVOQUERYCTRL or VIDIOC_QUERYCTRL, 0xbfed39b4) = 0
ioctl(3, MATROXFB_TVOQUERYCTRL or VIDIOC_QUERYCTRL, 0xbfed39b4) = 0
ioctl(3, MATROXFB_TVOQUERYCTRL or VIDIOC_QUERYCTRL, 0xbfed39b4) = 0
ioctl(3, MATROXFB_TVOQUERYCTRL or VIDIOC_QUERYCTRL, 0xbfed39b4) = 0
ioctl(3, MATROXFB_TVOQUERYCTRL or VIDIOC_QUERYCTRL, 0xbfed39b4) = 0
ioctl(3, MATROXFB_TVOQUERYCTRL or VIDIOC_QUERYCTRL, 0xbfed39b4) = 0
ioctl(3, MATROXFB_TVOQUERYCTRL or VIDIOC_QUERYCTRL, 0xbfed39b4) = 0
ioctl(3, MATROXFB_TVOQUERYCTRL or VIDIOC_QUERYCTRL, 0xbfed39b4) = 0
ioctl(3, MATROXFB_TVOQUERYCTRL or VIDIOC_QUERYCTRL, 0xbfed39b4) = 0
ioctl(3, MATROXFB_TVOQUERYCTRL or VIDIOC_QUERYCTRL, 0xbfed39b4) = -1 EINVAL
(Invalid argument)
ioctl(3, VIDIOC_G_CROP, 0xbfed3bf8) = -1 EINVAL (Invalid argument)
close(3) = 0
exit_group(0) = ?
Process 5614 detached
Actually I would have expected some width and hight values.
???
Regards
Harri
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