210 opencv打开摄像头

把opencv2.0移植到210板子上，用
CvCapture*capture=0;
capture=cvCaptureFromCAM(-1);
打开摄像头，摄像头是ov3640，但是打不开，请问我该怎么办？
我还用弄些什么驱动吗？
我现在就是吧摄像头插在板子，然后 ，用capture=cvCaptureFromCAM(-1);
但是不好使？求帮助

-1表示自动搜索摄像头，大于-1表示使用/dev/video数字
你看下你的摄像头设备是什么名字，如果不是video就创建一个链接成/dev/video数字，

有出错信息么？

TQ-lkp 发表于 2013-1-2 21:42
-1表示自动搜索摄像头，大于-1表示使用/dev/video数字
你看下你的摄像头设备是什么名字，如果不是video就创 ...

我的摄像头设备是什么名字？这个在哪看，实在文件系统里看吗？我没用过，不太明白？
如果不是video就创建一个链接成/dev/video数字
这个怎么创建？不太懂？请求指点！

TQ-lkp 发表于 2013-1-2 21:42
-1表示自动搜索摄像头，大于-1表示使用/dev/video数字
你看下你的摄像头设备是什么名字，如果不是video就创 ...

用不用增加摄像头的去什么的啊？

TQ-lkp 发表于 2013-1-2 21:42
-1表示自动搜索摄像头，大于-1表示使用/dev/video数字
你看下你的摄像头设备是什么名字，如果不是video就创 ...

我用不用增加摄像头的驱动什么的啊？
我的文件下系统 /dev目录下没有video啊？

使用参数200，或者202试一试！

wangchao7620 发表于 2013-1-8 10:32
使用参数200，或者202试一试！

点击open就出现如下内容，屏幕就死在那个！
s3c-fimc-0 : no camera device selected yet!do VIDIOC_S_INPUT first
Unable to handle kernel NULL pointer dereference at virtual address 000000dc
pgd = f362c000
[000000dc] *pgd=534fb031, *pte=00000000, *ppte=00000000
Internal error: Oops: 17 [] PREEMPT
last sysfs file: /sys/devices/virtual/misc/ds18b20/dev
Modules linked in: rt5370sta ds18b20 s5pv210_hdmi wm8960
CPU: 0    Tainted: G      D      (2.6.35.7-EmbedSky #15)
PC is at fimc_g_fbuf+0x44/0xd4
LR is at __video_do_ioctl+0x12e0/0x3ed0
pc : [<c0438e98>]    lr : [<c03e41ac>]    psr: 40000013
sp : f357fbb8  ip : f357fbd8  fp : f357fbd4
r10: f34f9400  r9 : f34bf0c0  r8 : 802c560a
r7 : c03e2ecc  r6 : 00000000  r5 : 00000000  r4 : f357fccc
r3 : 00000000  r2 : 00000011  r1 : 00000000  r0 : f34f9400
Flags: nZcv  IRQs on  FIQs on  Mode SVC_32  ISA ARM  Segment user
Control: 10c5387d  Table: 5362c019  DAC: 00000015

PC: 0xc0438e18:
8e18  159f301c e58630f0 ea000000 e3e00000 e24bd024 e89dadf0 c089a7db c06e1004
8e38  34424752 50424752 c099d88c c099d784 c089bb6a c089bb93 c089bbe2 e1a0c00d
8e58  e92dd8f0 e24cb004 e5913000 e1a04002 e5916004 e5932114 e59350a8 e3120c01
8e78  0a000003 e5931000 e59f0094 e59f2094 eb084eb8 e3a03fbf e3a01000 e0235693
8e98  e59320dc e5841004 e5842000 e59320e4 e5842008 e59310e8 e584100c e59320ec
8eb8  e5842010 e59320f0 e5842014 e59f2058 e59330f0 e1530002 03a02004 0a000003
8ed8  e2822307 e1530002 03a02002 13a02001 e0020291 e3a01fbf e3a03000 e0255691
8ef8  e1a00003 e3a01001 e58520f8 e584201c e59520fc e5841024 e5843028 e5842020

R9: 0xf34bf040:
f040  7865742e 2f650074 39386d77 00003036 00000000 00000000 00000000 00000000
f060  00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
f080  f34bf340 f34bf080 00000000 00000000 00000000 000001bd 00000000 00000000
f0a0  00001000 00000000 00000000 00000000 00000000 00000000 7b5dfff8 77fc7ff6
f0c0  f349b800 00000000 00000000 00000000 00000000 00000000 00000000 00000000
f0e0  00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
f100  66706d74 f34b0073 00000000 00000000 00000000 0000004d 00000000 00000000
f120  00001000 00000000 00000000 00000000 00000000 00000000 7bdd1bf7 aed9f738

R10: 0xf34f9380:
9380  f3b21730 c00f10dc 00000000 00000000 00000000 00000000 00000000 00000000
93a0  00000000 00000000 00000000 00000000 00000000 00000000 00000000 f3680700
93c0  00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
93e0  00000000 00000000 00000000 00000000 f34f93f0 f34f93f0 00000000 00000000
9400  f3702e80 f34b0c74 f34bdb00 f3afc680 c06c4300 00000001 00000002 0000001f
9420  00000000 00000000 00000000 00000000 00000000 00000000 00000000 f3680700
9440  00000000 00000000 00000000 00000000 00000000 00000000 ffffffff ffffffff
9460  00000000 00000000 00000000 f34bf0c0 f34f9470 f34f9470 f35632e0 00000000
Process 6 (pid: 108, stack limit = 0xf357e2f0)
Stack: (0xf357fbb8 to 0xf3580000)
fba0:                                                       f357fccc c092b608
fbc0: c06e0444 c03e2ecc f357fcbc f357fbd8 c03e41ac c0438e60 ffffffff f357e000
fbe0: c08f7980 0000011b 205e76d0 2098a678 0000011b f349b800 00000000 f349b830
fc00: 00000001 f357fc10 f357fc10 c043942c 00000018 00000000 0000001c 00000000
fc20: 00000000 00000000 00000024 00000000 00000028 00000000 0000002c 00000000
fc40: c08e8230 c0902fac 000080d0 00000000 f357fc94 f357fc60 c00ecd14 c00ebd84
fc60: 00000040 00000000 00000044 c08e8230 60000013 000080d0 00000000 f34f9400
fc80: f34bf0c0 f34f9400 f357fcbc f357fc98 c00ed7b4 f357fe30 f3680600 00000000
fca0: c03e2ecc f34f9400 00000080 f357fccc f357fd24 f357fcc0 c03eb4e4 c03e2ed8
fcc0: 000000d8 00000000 000000dc 00000000 00000000 00000000 00000000 00000000
fce0: 00000000 00000000 00000000 00000000 00000000 00000000 00000174 f357fe30
fd00: c092b608 c06e0444 0000003c 803c7601 f34bf0c0 f34f9400 f357fd34 f357fd28
fd20: c03ecaa8 c03eb3b0 f357fe1c f357fd38 c03e2f58 c03ec99c f349b800 f34bf0c0
fd40: f357fd64 f357fd50 c043b39c c0439410 f349b800 f34bf0c0 f357fdac f357fd68
fd60: c0430db0 c064db3c ffffffff fd000000 c092b618 f34f9400 f3c66b00 00000040
fd80: c0277358 c0430af4 c092b610 f34f9400 00000000 00000000 f3afc680 f34f9400
fda0: f357fdcc f357fdb0 c03e2214 c0430b00 00000000 f3422540 f3563240 00000000
fdc0: f357fe04 f357fdd0 c00f369c c03e219c f3afc680 00000000 f357fdf4 f34f9400
fde0: f34bdb00 f3563240 00000000 00000000 f34f9400 803c7601 f357fe30 00000000
fe00: 0000003c 00000000 0011f6fc 00000000 f357fedc f357fe20 c03e70d0 c03e2ed8
fe20: 00000026 f34f9400 00000002 00000000 00000000 00000000 00000000 00000000
fe40: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
fe60: 00000000 00000000 00000000 f34f9400 f357fe94 f357fe80 c00f9c00 c010a678
fe80: f357fec8 00000002 f357ff5c f357fe98 c00fd820 c00f9bd8 00000000 f3627000
fea0: f357ff20 f357fedc ffffff9c f357fedc 00000000 f34f9400 00000000 0011f6fc
fec0: 803c7601 00000000 f357e000 00000000 f357feec f357fee0 c03e1fec c03e6da8
fee0: f357ff0c f357fef0 c00fedac c03e1fac 0011f6fc f34f9400 803c7601 0000000d
ff00: f357ff74 f357ff10 c00ff404 c00fed34 00000000 00000003 00000000 f34f9400
ff20: f357ff54 f357ff30 c02460f4 c0242854 f34f9400 0011f6fc 803c7601 0000000d
ff40: c003a168 f357e000 f357ff64 f357ff58 f34f9400 0011f6fc 803c7601 0000000d
ff60: 00000000 f357e000 f357ffa4 f357ff78 c00ff4ac c00feee4 00000005 00000000
ff80: f357e000 00000000 0011f6f0 00000001 00000036 c003a168 00000000 f357ffa8
ffa0: c0039fc0 c00ff460 00000000 0011f6f0 0000000d 803c7601 0011f6fc 4104fce0
ffc0: 00000000 0011f6f0 00000001 00000036 4104327c 4104e830 00000001 bec81880
ffe0: bec810fc bec810c0 4103e87c 41b611cc 20000010 0000000d e080000c e54b3035
Backtrace:
[<c0438e54>] (fimc_g_fbuf+0x0/0xd4) from [<c03e41ac>] (__video_do_ioctl+0x12e0/0x3ed0)
r7:c03e2ecc r6:c06e0444 r5:c092b608 r4:f357fccc
[<c03e2ecc>] (__video_do_ioctl+0x0/0x3ed0) from [<c03eb4e4>] (v4l1_compat_get_capabilities+0x140/0x268)
[<c03eb3a4>] (v4l1_compat_get_capabilities+0x0/0x268) from [<c03ecaa8>] (v4l_compat_translate_ioctl+0x118/0x1f8)
[<c03ec990>] (v4l_compat_translate_ioctl+0x0/0x1f8) from [<c03e2f58>] (__video_do_ioctl+0x8c/0x3ed0)
[<c03e2ecc>] (__video_do_ioctl+0x0/0x3ed0) from [<c03e70d0>] (video_ioctl2+0x334/0x494)
[<c03e6d9c>] (video_ioctl2+0x0/0x494) from [<c03e1fec>] (v4l2_ioctl+0x4c/0x54)
[<c03e1fa0>] (v4l2_ioctl+0x0/0x54) from [<c00fedac>] (vfs_ioctl+0x84/0xb4)
[<c00fed28>] (vfs_ioctl+0x0/0xb4) from [<c00ff404>] (do_vfs_ioctl+0x52c/0x57c)
r7:0000000d r6:803c7601 r5:f34f9400 r4:0011f6fc
[<c00feed8>] (do_vfs_ioctl+0x0/0x57c) from [<c00ff4ac>] (sys_ioctl+0x58/0x7c)
r9:f357e000 r8:00000000 r7:0000000d r6:803c7601 r5:0011f6fc
r4:f34f9400
[<c00ff454>] (sys_ioctl+0x0/0x7c) from [<c0039fc0>] (ret_fast_syscall+0x0/0x30)
r8:c003a168 r7:00000036 r6:00000001 r5:0011f6f0 r4:00000000
Code: eb084eb8 e3a03fbf e3a01000 e0235693 (e59320dc)
---[ end trace c24530b117392aa7 ]---
Segmentation fault