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

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1	ls /dev/video*

 二.adb 查看camera 详细信息　

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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

 

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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

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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