Android MediaRecorder制作旋转视频

Question

我一直在尝试让 MediaRecorder 按照官方示例工作，虽然我能够制作一个顺时针旋转 90 度的文件...

现在我在纵向模式下尝试这个并且确实将预览表面旋转了 90 度并将其锁定为纵向模式...

我不知道如何解决这个问题并获得纵向视频，并且尝试了与该主题相关的无数解决方案都无济于事...

代码:

public class CameraRecorder {

private Camera cam;
private MediaRecorder mMediaRecorder;
private CameraPreview mPreview;
private static Context mContext;

public CameraRecorder(CameraPreview preview, Context context){

    mPreview = preview;
    cam = mPreview.getCamera();
    //cam.getParameters().setRotation(0);
    mContext = context;

}

public boolean prep(){


    mMediaRecorder = new MediaRecorder();
    //mMediaRecorder.setOrientationHint(90);

    // Step 1: Unlock and set camera to MediaRecorder
    cam.unlock();
    mMediaRecorder.setCamera(cam);

    // Step 2: Set sources
    //mMediaRecorder.setAudioSource(mContext.openFileInput());
    mMediaRecorder.setVideoSource(MediaRecorder.VideoSource.CAMERA);


    // Step 3: Set a CamcorderProfile (requires API Level 8 or higher)
    mMediaRecorder.setOutputFormat(MediaRecorder.OutputFormat.MPEG_4);
    //mMediaRecorder.setVideoSize(mPreview.getMeasuredWidth(), mPreview.getMeasuredHeight());
    mMediaRecorder.setVideoEncoder(MediaRecorder.VideoEncoder.MPEG_4_SP);

    //mMediaRecorder.setProfile(CamcorderProfile.get(CamcorderProfile.QUALITY_LOW));

    // Step 4: Set output file
    mMediaRecorder.setOutputFile(getOutputMediaFile().toString());

    // Step 5: Set the preview output
    mMediaRecorder.setPreviewDisplay(mPreview.getHolder().getSurface());

    // Step 6: Prepare configured MediaRecorder
    try {
        mMediaRecorder.prepare();
    } catch (IllegalStateException e) {
        Log.d("Exception", "IllegalStateException preparing MediaRecorder: " + e.getMessage());
        releaseMediaRecorder();
        return false;
    } catch (IOException e) {
        Log.d("Exception", "IOException preparing MediaRecorder: " + e.getMessage());
        releaseMediaRecorder();
        return false;
    } catch (Exception e) {
        Log.d("Exception", "Exception preparing MediaRecorder: " + e.getMessage());
        return false;
    }
    return true;

}

public static File getOutputMediaFile(){

    File mediaFile;

    mediaFile = new File(mContext.getCacheDir() + File.separator + "vid.mp4");

    return mediaFile;


}

public void releaseMediaRecorder(){

    if (mMediaRecorder != null) {
        mMediaRecorder.reset();   // clear recorder configuration
        mMediaRecorder.release(); // release the recorder object
        mMediaRecorder = null;
        cam.lock();           // lock camera for later use
    }

}

public void startRecording(){

    mMediaRecorder.start();

}

public void stopRecording(){

    try {
        mMediaRecorder.stop();  // stop the recording
        releaseMediaRecorder(); // release the MediaRecorder object
        cam.lock();
    } catch (Exception e) {
        Log.d("Exception","Exiting with exception: " + e.getMessage());
    }



}



}

我已经尝试了评论方法的各种组合，但没有结果(设置特定的视频大小会导致“尝试删除损坏的文件”错误，所以我把它留了下来)......顺便说一句，我故意忽略了音频源，因为我只需要视频(我需要稍后拼接音频，而且确实也不知道从哪里开始)

非常感谢任何提示、想法或指示!

Answer 1

您不能旋转视频。只是预览表面或静止图像。但不是视频流。