Question

我正在做android摄像头应用程序。它应该具有使用后置和前置摄像头进行录制的功能。我完成了后置摄像头，一切都很好。但是当我用前置摄像头录制时，视频会颠倒过来。我必须播放我的应用程序本身录制的视频。我正在使用VideoView，如何设置方向或使其正确播放？在默认媒体播放器中播放的视频也在颠倒播放。尝试将视频发送到iPhone并进行检查，但仍然会颠倒。我有setOrientationHint到MediaRecorder但没有解决方案。

我的所有代码与agargenta's Video Capture Demo类似，我已完成自定义。

问题似乎很奇怪，我很震惊。

this.mediaRecorder = new MediaRecorder();
        this.mediaRecorder.setCamera(this.mCamera);
        this.mediaRecorder.setAudioSource(MediaRecorder.AudioSource.CAMCORDER);
        this.mediaRecorder.setVideoSource(MediaRecorder.VideoSource.CAMERA);
        if (Build.VERSION.SDK_INT <= 10) {
            CamcorderProfile camcorderProfile = CamcorderProfile
                    .get(CamcorderProfile.QUALITY_HIGH);
            camcorderProfile.videoFrameWidth = 320;
            camcorderProfile.videoFrameHeight = 480;
            // camcorderProfile.videoFrameRate = 15;
            camcorderProfile.videoCodec = MediaRecorder.VideoEncoder.H264;
            // camcorderProfile.audioCodec = MediaRecorder.AudioEncoder.DEFAULT;
            camcorderProfile.fileFormat = MediaRecorder.OutputFormat.MPEG_4;
            this.mediaRecorder.setProfile(camcorderProfile);
mediaRecorder.setOrientationHint(90);
        } else {
            if (tgbSwitchCamera.isChecked()) {
                mediaRecorder
                        .setOutputFormat(MediaRecorder.OutputFormat.MPEG_4);
                // mediaRecorder.setVideoSize(320, 480);
                mediaRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.AAC);
                mediaRecorder.setVideoEncoder(MediaRecorder.VideoEncoder.H264);
                CameraInfo cameraInfo = new CameraInfo();
                Camera.getCameraInfo(CameraInfo.CAMERA_FACING_FRONT, cameraInfo);
                rotation = (cameraInfo.orientation - 180 + 360) % 360;
                mediaRecorder.setOrientationHint(rotation);

            } else {
                CamcorderProfile camcorderProfile = CamcorderProfile
                        .get(CamcorderProfile.QUALITY_LOW);
                camcorderProfile.videoFrameWidth = 640;
                camcorderProfile.videoFrameHeight = 480;
                camcorderProfile.videoCodec = MediaRecorder.VideoEncoder.H264;
                // camcorderProfile.audioCodec =
                // MediaRecorder.AudioEncoder.DEFAULT;
                camcorderProfile.fileFormat = MediaRecorder.OutputFormat.MPEG_4;
                this.mediaRecorder.setProfile(camcorderProfile);
mediaRecorder.setOrientationHint(90);
            }
        }
        this.mediaRecorder.setOutputFile(this.initFile().getAbsolutePath());
        this.mediaRecorder.setPreviewDisplay(mPreview.getHolder().getSurface());

        try {
            this.mediaRecorder.prepare();

            // start the actual recording
            // throws IllegalStateException if not prepared
            Handler h = new Handler();
            h.postDelayed(new Runnable() {

                @Override
                public void run() {
                    this.mediaRecorder.start();
                    pgv.setStart(true);
                    pgv.invalidate();
                    CountDownTimer cdt = new CountDownTimer(5000, 1000) {

                        @Override
                        public void onTick(long millisUntilFinished) {
                        }

                        @Override
                        public void onFinish() {
                            if (isRecording) {
                                handler.removeMessages(STOP);
                                stopRecording();
                            }
                        }
                    };
                    cdt.start();
                }
            }, 1000);

            // enable the stop button by indicating that we are recording
        } catch (Exception e) {
            Toast.makeText(this, "cannot record", Toast.LENGTH_SHORT).show();
            e.printStackTrace();
            this.releaseMediaRecorder();
        }

Answer 1

此行将专门将视频旋转180度：

rotation = (cameraInfo.orientation - 180 + 360) % 360;

除非你有理由这样做我没有看到，这就是为什么你的视频是颠倒的。

从Android中的Front Camera录制时，视频会颠倒播放

1 个答案: