MediaRecorder.setVideoSize()在MediaRecorder.start()处导致RuntimeException (启动失败)

Question

当我试图为我的MediaRecorder设置视频大小时，我会在start方法中得到一个RuntimeException。

mRecorder.setAudioSource(MediaRecorder.AudioSource.MIC);
if (isVideo)
    mRecorder.setVideoSource(MediaRecorder.VideoSource.CAMERA);

mRecorder.setOutputFormat(MediaRecorder.OutputFormat.MPEG_4);

mRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.AAC);
if (isVideo) {
    mRecorder.setVideoSize(480, 360); // Works fine when this is removed
    mRecorder.setVideoEncoder(MediaRecorder.VideoEncoder.H264);
}

mRecorder.setOutputFile(newFilePath);

if (isVideo)
    mRecorder.setPreviewDisplay(surfaceHolder.getSurface());

mRecorder.prepare();    // Prepare recorder
mRecorder.start();      // Start recording

Answer 1

下面是我发现的最优雅的解决方案：

CamcorderProfile profile = CamcorderProfile.get(CamcorderProfile.QUALITY_HIGH);

mRecorder.setVideoSize(profile.videoFrameWidth, profile.videoFrameHeight);

Answer 2

使用Camera.Parameters获取支持的视频大小。相机经常不能任意缩放图像，大概是因为性能原因。