Camera Rasberry Pi-Raspbian-运动-USB摄像头-黑色图像

我最近买了一个Rasperry Pi，VersionB，我正试图让一个旧的USB摄像头与motion一起工作，这样我就可以通过http访问流。我正在使用Raspbian，更新/升级已经完成

我相当肯定相机会工作，因为我已经玩了相当长一段时间的motion.conf文件，并且多次拔下/重新插入usb相机，并且在某个时候录制了2秒的运动视频，但是，我不确定我做了什么使它暂时工作

此外，我能够访问控制端口8089，以及8081（在firefox中）的流，但是流是黑色背景，右下角有一个计数器

控制端口列出相机已连接且运动检测处于活动状态，但端口8081上的视频流为黑色

最后，当我通过控制端口（8089）手动捕获一个屏幕截图时，屏幕截图是一个黑色图像，就像相机被覆盖一样

也就是说，我决定转向堆栈向导

供参考：

lsusb

与摄像机相关的输出：

Bus 001 Device 005: ID 0c45:6288 Microdia PC Camera with Microphone (SN9C202 + OV9655)

-编辑：

dmesg

插入USB摄像头后收到的输出：

[  269.597235] usb 1-1.2: new high-speed USB device number 5 using dwc_otg
[  269.700498] usb 1-1.2: New USB device found, idVendor=0c45, idProduct=6288
[  269.700530] usb 1-1.2: New USB device strings: Mfr=0, Product=1, SerialNumber=0
[  269.700546] usb 1-1.2: Product: USB20 Camera
[  269.784573] media: Linux media interface: v0.10
[  269.810131] Linux video capture interface: v2.00
[  269.819113] gspca_main: v2.14.0 registered
[  269.826148] gspca_main: gspca_sn9c20x-2.14.0 probing 0c45:6288
[  271.897401] gspca_sn9c20x: OV9655 sensor detected
[  271.905922] input: gspca_sn9c20x as /devices/platform/bcm2708_usb/usb1/1-1/1-1.2/input/input0
[  271.910445] usbcore: registered new interface driver gspca_sn9c20x
[  272.078022] 5:2:1: cannot get freq at ep 0x84
[  272.091857] usbcore: registered new interface driver snd-usb-audio
[  278.190887] gspca_sn9c20x: Set 640x480
[  279.187333] gspca_sn9c20x: Set 640x480
[  280.158810] gspca_main: ISOC data error: [23] len=0, status=-63

sudo运动的输出-n

[0] Processing thread 0 - config file /etc/motion/motion.conf
[0] Motion 3.2.12 Started
[0] ffmpeg LIBAVCODEC_BUILD 3482368 LIBAVFORMAT_BUILD 3478785
[0] Thread 1 is from /etc/motion/motion.conf
[0] httpd bind(): Address already in use
[1] Thread 1 started
[0] httpd thread exit
[1] cap.driver: "gspca_sn9c20x"
[1] cap.card: "USB20 Camera    "
[1] cap.bus_info: "usb-bcm2708_usb-1.3"
[1] cap.capabilities=0x85000001
[1] - VIDEO_CAPTURE
[1] - READWRITE
[1] - STREAMING
[1] Test palette JPEG (640x480)
[1] Using palette JPEG (640x480) bytesperlines 640 sizeimage 154190 colorspace 00000007
[1] found control 0x00980900, "Brightness", range 0,255
[1]     "Brightness", default 127, current 127
[1] found control 0x00980901, "Contrast", range 0,255
[1]     "Contrast", default 127, current 127
[1] found control 0x00980902, "Saturation", range 0,255
[1]     "Saturation", default 127, current 127
[1] found control 0x00980903, "Hue", range -180,180
[1]     "Hue", default 0, current 0
[1] found control 0x0098090e, "Red Balance", range 0,127
[1]     "Red Balance", default 40, current 40
[1] found control 0x0098090f, "Blue Balance", range 0,127
[1]     "Blue Balance", default 40, current 40
[1] found control 0x00980910, "Gamma", range 0,255
[1]     "Gamma", default 16, current 16
[1] found control 0x00980911, "Exposure", range 0,6016
[1]     "Exposure", default 51, current 5864
[1] found control 0x00980912, "Gain, Automatic", range 0,1
[1]     "Gain, Automatic", default 1, current 1
[1] found control 0x00980913, "Gain", range 0,28
[1]     "Gain", default 0, current 0
[1] Error requesting buffers 4 for memory map. VIDIOC_REQBUFS: Device or resource busy
[1] ioctl (VIDIOCGCAP): Inappropriate ioctl for device
[1] Could not fetch initial image from camera
[1] Motion continues using width and height from config file(s)
[1] Resizing pre_capture buffer to 1 items
[1] bind(): Address already in use
[1] Problem enabling stream server in port 8088: Address already in use
[1] Thread exiting
[0] Motion thread 1 restart
[1] Thread 1 started
""""
""""
""""
""""

来自

lsmod的输出

Module                  Size  Used by
snd_bcm2835            16165  0
snd_usb_audio         116191  0
snd_usbmidi_lib        18267  1 snd_usb_audio
snd_hwdep               5968  1 snd_usb_audio
snd_seq_midi            4682  0
snd_seq_midi_event      6551  1 snd_seq_midi
snd_rawmidi            21357  2 snd_usbmidi_lib,snd_seq_midi
snd_pcm                81593  2 snd_bcm2835,snd_usb_audio
snd_page_alloc          5156  1 snd_pcm
snd_seq                53769  2 snd_seq_midi_event,snd_seq_midi
snd_seq_device          6473  3 snd_seq,snd_rawmidi,snd_seq_midi
snd_timer              20133  2 snd_pcm,snd_seq
snd                    58895  9 snd_bcm2835,snd_usb_audio,snd_hwdep,snd_timer,snd_pcm,snd_seq,snd_rawmidi,snd_usbmidi_lib,snd_seq_device
evdev                   9325  1
arc4                    1683  2
rt2800usb              16720  0
rt2800lib              67499  1 rt2800usb
rt2x00usb              11492  1 rt2800usb
rt2x00lib              44180  3 rt2x00usb,rt2800lib,rt2800usb
gspca_sn9c20x          25601  1
gspca_main             23579  2 gspca_sn9c20x
mac80211              315610  3 rt2x00lib,rt2x00usb,rt2800lib
videodev              111230  3 gspca_sn9c20x,gspca_main
cfg80211              209273  2 mac80211,rt2x00lib
media                  13467  1 videodev
crc_ccitt               1529  1 rt2800lib
leds_gpio               2059  0
rfkill                 19138  2 cfg80211
led_class               3688  2 leds_gpio,rt2x00lib

如果有关系，我已经设置了作为守护进程运行的运动

还有什么我应该检查/更改以使事情正常工作的吗

另外，很明显，我是linux/debian noob，所以请对我放松。
在低端笔记本电脑上也有同样的问题。pi上可用的总USB带宽是有限的，您已经在使用一些用于网络连接

我建议您降低运动处理的图像分辨率和帧速率

首先，我假设您安装了最新版本的motion

sudo apt-get update
sudo apt-get install motion

然后我们确认USB摄像头已被识别为v4l2设备

lsusb
ls /dev/video*
v4l2-ctl --list-devices

确保在每个输出中都能看到预期的摄像头。记下摄像机的名称，我假设
/dev/video0

现在我们将编辑运动配置

sudo nano /etc/motion/motion.conf

在“捕获设备选项”标题下，您应该拥有与现有设备匹配的摄像头。e、 g.
videodevice/dev/video0

接下来确保帧率和分辨率是好的和低的。你可以在以后增加这些直到运动再次中断，只要从有效的开始

width 320
height 240
framerate 2

对于调试，最好打开实时网络摄像头服务器，使其能够从笔记本电脑上查看。只需查看
/etc/motion/motion.conf
文件，直到找到该部分

webcam_motion on
webcam_localhost off

现在我们需要打开一个不同的文件来启用运动守护进程

sudo nano /etc/default/motion

将该值更改为
start\u motion\u daemon=yes

现在我们可以运行运动了

sudo service motion start

我们将在Firefox中查看摄像头的提要。首先使用ifconfig查找pi的IP地址，如果您是wifi等，则查找wlan0

ifconfig

我假设pi IP地址是
192.168.1.123

现在，从笔记本电脑打开firefox，在地址栏中输入
192.168.1.123:8081
。您将看到运动提要的预览！！如果您没有，请将分辨率降低，并确保您的笔记本电脑连接良好，并且与pi位于同一网络上。
您还记得如何解决此问题吗