USB摄像头常见问题

文章目录

USB摄像头常见问题

预览闪退

原因分析

摄像头不支持默认预览分辨率

解决方法：配置USB摄像头预览分辨率

$ vim hardware/rockchip/camera/CameraHal/CameraUSBAdapter.cpp
@@ -135,7 +135,7 @@ void CameraUSBAdapter::initDefaultParameters(int camFd)
     params.set(KEY_PREVIEW_W_FORCE,"0");
     params.set(KEY_PREVIEW_H_FORCE,"0");
     params.set(CameraParameters::KEY_SUPPORTED_PREVIEW_SIZES, parameterString.string());
-    params.setPreviewSize(640,480);
+    params.setPreviewSize(320,240);
     /*picture size setting*/      
     params.set(CameraParameters::KEY_SUPPORTED_PICTURE_SIZES, parameterString.string());        
     params.setPictureSize(mCamDriverFrmWidthMax,  mCamDriverFrmHeightMax);

拍照闪退

原因分析

摄像头不支持默认拍照分辨率

解决方法：配置USB摄像头默认拍照分辨率

$ vim hardware/rockchip/camera/CameraHal/CameraAdapter.cpp
@@ -168,7 +168,8 @@ bool CameraAdapter::getFlashStatus()
 }
 status_t CameraAdapter::startPreview(int preview_w,int preview_h,int w, int h, int fmt,bool is_capture)
 {
-    
+    w = 640;
+   h = 480;
     //create buffer
        LOG_FUNCTION_NAME
     unsigned int frame_size = 0,i;

录像闪退

原因分析

摄像头不支持默认录像分辨率，必须修改为支持录像分辨率

解决方法：配置USB摄像头录像分辨率

$ vim frameworks/av/media/libstagefright/CameraSource.cpp

@@ -493,6 +493,10 @@ status_t CameraSource::init(
         int32_t frameRate,
         bool storeMetaDataInVideoBuffers) {
 
+        videoSize.width = 640;         
+        videoSize.height = 480;
+       frameRate = 15;

     ALOGV("init");
     status_t err = OK;
     int64_t token = IPCThreadState::self()->clearCallingIdentity();