Camera(一):查看Camera设备详细信息
一.查看是否存在camera外设,设备节点
ls /dev/video*
二.adb 查看camera 详细信息
2.1.adb shell dumpsys media.camera
2.2.adb 查看camera 过滤信息
查看某一项参数,使用过滤命令grep(linux), windows下可使用findstr来过滤
dumpsys media.camera |grep picture-size
//Camera preview 相关信息
picture-size: 1920x1080
picture-size-values: 640x480,1920x1080,1600x1080,1280x720,640x360,352x288,176x144,160x120,848x480,320x240
2.3.adb 保存camera信息
adb shell dumpsys media.camera > C:\Users\Administrator\Desktop\camera.txt
adb shell dumpsys media.camera
Camera module HAL API version: 0x3
Camera module API version: 0x1
Camera module name: RK29_ICS_CameraHal_Module
Camera module author: RockChip
Number of camera devices: 1 //Camera个数 双目:2 单个:1 识别不到:0
Vendor tags left unimplemented.
Camera 0 static information:
Facing: BACK
Orientation: 0 //Camera预览方向:对应设置里面的“摄像头方向”,这里相当于读取
Device version: 0x100
Device is open. Client instance dump:
Client[0] (0xb86d2b18) PID: 1360
Latest set parameters:
CameraParameters::dump: mMap.size = 50
antibanding: off
antibanding-values: off,50hz,60hz,auto
exposure-compensation: 0
exposure-compensation-step: 1
focal-length: 35
focus-distances: 0.3,50,Infinity
focus-mode: fixed
focus-mode-values: fixed
horizontal-view-angle: 10
jpeg-quality: 90
jpeg-thumbnail-height: 128
jpeg-thumbnail-quality: 50
jpeg-thumbnail-size-values: 0x0,160x128
jpeg-thumbnail-width: 160
max-exposure-compensation: 3
max-num-detected-faces-hw: 0
max-num-detected-faces-sw: 0
max-num-focus-areas: 0
max-num-metering-areas: 0
max-zoom: 40
min-exposure-compensation: -3
picture-format: jpeg //Camera preview 相关信息
picture-format-values: jpeg
picture-size: 1920x1080 //预览分辨率
picture-size-values: 640x480,1920x1080,1600x1080,1280x720,640x360,352x288,176x144,160x120,848x480,320x240
preferred-preview-size-for-video: 1280x720
preview-format: yuv420sp
preview-format-values: yuv420sp,yuv420p
preview-fps-range: 10000,15000
preview-fps-range-values: (10000,15000)
preview-frame-rate: 15
preview-frame-rate-values: 15,10
preview-size: 1920x1080
preview-size-values: 640x480,1920x1080,1600x1080,1280x720,640x360,352x288,176x144,160x120,848x480,320x240
recording-hint: false
rk-continous-pic-num: 1
rk-previwe-h-force: 0
rk-previwe-w-force: 0
rotation: 0
vertical-view-angle: 10
video-frame-format: yuv420sp
video-size: 1280x720
video-size-values: 176x144,320x240,352x288,640x480,1280x720,1920x1080
video-snapshot-supported: true
video-stabilization-supported: false
whitebalance: auto
whitebalance-values: auto,incandescent,fluorescent,daylight,cloudy-daylight
zoom: 0
zoom-ratios: 100,105,110,115,120,125,130,135,140,145,150,155,160,165,170,175,180,185,190,195,200,205,210,215,220,225,230,235,240,245,250,255,260,265,270,275,280,285,290,295,300,
zoom-supported: true
Camera traces (0):
No camera traces collected.
二.Camera Hardware 一些常见的问题
1.1. 多个摄像头带宽限制 cameraStream(543): VIDIOC_STREAMON Failed ,err: No space left on device
01-06 18:04:44.534 244 1521 D CameraHal: cameraSetSize(514): cameraSetSize(514):IN, w = 640,h = 480 01-06 18:04:44.552 244 1521 D CameraHal: cameraStream(536): cameraStream(536):on = 1 01-06 18:04:45.100 244 1521 E CameraHal: cameraStream(543): cameraStream(543): VIDIOC_STREAMON Failed ,err: No space left on device 01-06 18:04:45.100 244 1521 D CameraHal: startPreview(255): startPreview(255):OUT 01-06 18:04:45.102 244 1521 D CameraHal: commandThread(1013): commandThread(1013): CMD_PREVIEW_START out 01-06 18:04:45.102 244 1521 D CameraHal: commandThread(1045): commandThread(1045):receive CMD_SET_PREVIEW_WINDOW
1.2.摄像头协议错误 usb线材可能有问题 cameraStream(543): VIDIOC_STREAMON Failed ,err: Protocol error
