@OverrIDepublic voID surfaceChanged(SurfaceHolder holder,int format,int wIDth,int height) { Camera.Parameters myParameters = mCamera.getParameters(); List<Camera.Size> sizes = myParameters.getSupportedPrevIEwSizes(); Camera.Size myBestSize = getBestPrevIEwSize(sizes,wIDth,height); if (myBestSize != null) { myParameters.setPrevIEwSize(myBestSize.wIDth,myBestSize.height); myParameters.setVIDeoStabilization(false); mCamera.setParameters(myParameters); mCamera.startPrevIEw(); mCamera.unlock(); }}private Camera.Size getBestPrevIEwSize(List<Camera.Size> sizes,int height) { final double ASPECT_TolERANCE = 0.05; double targetRatio = (double) wIDth / height; if (sizes == null) return null; Camera.Size optimalSize = null; double minDiff = Double.MAX_VALUE; int targetHeight = height; // Find size for (Camera.Size size : sizes) { double ratio = (double) size.wIDth / size.height; if (Math.abs(ratio - targetRatio) > ASPECT_TolERANCE) continue; if (Math.abs(size.height - targetHeight) < minDiff) { optimalSize = size; minDiff = Math.abs(size.height - targetHeight); } } if (optimalSize == null) { minDiff = Double.MAX_VALUE; for (Camera.Size size : sizes) { if (Math.abs(size.height - targetHeight) < minDiff) { optimalSize = size; minDiff = Math.abs(size.height - targetHeight); } } } return optimalSize;}
但录制视频时,预览仍会放大.我尝试手动将预览大小设置为1280×720,但是它在我测试的所有设备上都不起作用,有些显示黑色的SurfaceVIEw.
录制视频时有什么办法阻止预览放大吗? StackOverflow中的这些解决方案都不会似乎有效.
编辑:我尝试使用自己的onMesaure方法创建了一个自定义的SurfaceVIEw,但是当我启动MediaRecorder时,我收到一个-19错误. (不顾赏金中的-16)
解决方法 我对您所谈论的缩放类型感到困惑,可能是一个软件缩放,或者可能是自动对焦,所以我会提出不同的潜在提示,导致最终的解决方案:>实现mCamera.setZoomchangelistener,例如:
mCamera.setZoomchangelistener(new Camera.OnZoomchangelistener() { @OverrIDe public voID onZoomChange(int i,boolean b,Camera camera) { Log.e("StackOverflow","Zoom just changed !"); // Inspect things from here }});
>禁用平滑缩放:
mCamera.stopSmoothZoom(); // My device doesn't support it,but maybe your device does
>检查所有的相机Camera.Parameters:
Log.e("StackOverflow","All Camera parameters :");for(String s : mCamera.getParameters().flatten().split(";")) Log.e("StackOverflow",s + "\n");
>然后切换可以缩放相关的任何东西,例如:
Camera.Parameters parameters = mCamera.getParameters();parameters.setZoom(100); // My device support some values in the range 100 | 400parameters.setFocusMode(Camera.Parameters.FOCUS_MODE_INFINITY);parameters.setVIDeoStabilization(false);// Don't forget to add the new parameters to the camera :mCamera.setParameters(parameters);
问候
总结以上是内存溢出为你收集整理的Android相机 – 录制视频时预览放大全部内容,希望文章能够帮你解决Android相机 – 录制视频时预览放大所遇到的程序开发问题。
如果觉得内存溢出网站内容还不错,欢迎将内存溢出网站推荐给程序员好友。
欢迎分享,转载请注明来源:内存溢出
评论列表(0条)