Android Media Recorder Delay

Question

I record some small videos in 10 seconds. I need to prepare and run the media recorder again and again before creating any video. In this regard, in each video there is a time delay of one or two seconds. Is there a way to avoid this delay when preparing a media recorder such as Instagram?

public boolean startRecording() {

    startCamera();
    camera.unlock();

    int rotation = 0;
    cameraInfo = new CameraInfo();
    Camera.getCameraInfo(cameraId, cameraInfo);
    if (cameraInfo.facing == Camera.CameraInfo.CAMERA_FACING_FRONT) {
        rotation = 270;
    } else {
        rotation = 90;
    }

    mMediaRecorder = new MediaRecorder();
    mMediaRecorder.setOrientationHint(rotation);
    mMediaRecorder.setCamera(camera);
    mMediaRecorder.setAudioSource(MediaRecorder.AudioSource.MIC);
    mMediaRecorder.setVideoSource(MediaRecorder.VideoSource.DEFAULT);
    mMediaRecorder.setOutputFormat(MediaRecorder.OutputFormat.MPEG_4);
    mMediaRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.AAC);
    mMediaRecorder.setVideoEncoder(MediaRecorder.VideoEncoder.H264);
    mMediaRecorder.setVideoFrameRate(30); 
    mMediaRecorder.setVideoEncodingBitRate(1500000);
    mMediaRecorder.setVideoSize(640, 480);
    File f = new File(cVideoFilePath);
            int countNames = 1;
    String[] fileNameList = null;
    fileNameList = f.list();
    for (int i = 0; i < fileNameList.length; i++) {

        if (fileNameList[i].contains("TapVid")) {
            countNames++;
        }

    }

    updatedFileNumber = countNames;
    prRecordedFile = new File(cVideoFilePath + "Vid" + updatedFileNumber
            + ".mp4");
    mMediaRecorder.setOutputFile(prRecordedFile.getPath());

    mMediaRecorder.setPreviewDisplay(surfaceHolder.getSurface());

    try {
        mMediaRecorder.prepare();

        mMediaRecorder.start();
    } catch (Exception e) {
        e.printStackTrace();
        releaseMediaRecorder();
        return false;
    }


    return true;
}

Answer 1

Therefore, Instagram also suffers from MediaRecorder's delay. You can tell when you make quick taps. The progress bar resets. This is only after you hold the record button for longer than a second, it actually captures something.

MediaRecorder. - API setPreviewCallbackWithBuffer. API , YUV, . MediaCodec .

OEM- MediaCodec , , 4.3. , MediaCodec, , , , YUV, . AV.

ffmpeg - , ffmpeg. VP8 + vorbis - , .