android video app time lapse

Nigel May 25, 2016 1:21 pm

The android video app time lapse tutorial describes how to add record video in time lapse format.

In the android camera2 api video application we will be implementing a long click listener to be used for the time-lapse mode. Stopping time-lapse recording will be the same as recording, by just pressing the record button.

Get Code

The code to start this tutorial is on github here

https://github.com/mobapptuts/android_camera2_api_video_app.git Tag camera2-video-timelapse

or you can run this command

git clone https://github.com/mobapptuts/android_camera2_api_video_app.git –branch camera2-video-timelapse

Link to youtube tutorial describing how to do this using android studio

Steps

Add the images to the project

Add a flag to track the status of when the time-lapse is on

private boolean mIsTimelapse = false;

Add a long click listener to the record button

Where we will be changing the icon to time-lapse. We will also use the existing code to stop the time-lapse, the same as when we stop recording.

 @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_camera2_video_image);

        createVideoFolder();
        createImageFolder();

        mChronometer = (Chronometer) findViewById(R.id.chronometer);
        mTextureView = (TextureView) findViewById(R.id.textureView);
        mStillImageButton = (ImageButton) findViewById(R.id.cameraImageButton2);
        mStillImageButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                lockFocus();
            }
        });
        mRecordImageButton = (ImageButton) findViewById(R.id.videoOnlineImageButton);
        mRecordImageButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                if (mIsRecording || mIsTimelapse) {
                    mChronometer.stop();
                    mChronometer.setVisibility(View.INVISIBLE);
                    mIsRecording = false;
                    mIsTimelapse = false;
                    mRecordImageButton.setImageResource(R.mipmap.btn_video_online);
                    mMediaRecorder.stop();
                    mMediaRecorder.reset();
                    startPreview();
                } else {
                    mIsRecording = true;
                    mRecordImageButton.setImageResource(R.mipmap.btn_video_busy);
                    checkWriteStoragePermission();
                }
            }
        });
        mRecordImageButton.setOnLongClickListener(new View.OnLongClickListener() {
            @Override
            public boolean onLongClick(View v) {
                mIsTimelapse =true;
                mRecordImageButton.setImageResource(R.mipmap.btn_timelapse);
                checkWriteStoragePermission();
                return true;
            }
        });
    }

Create a method for setting up the time-lapse in the MediaRecorder

private void setupTimeLapse() throws IOException {
       mMediaRecorder.setVideoSource(MediaRecorder.VideoSource.SURFACE);
       mMediaRecorder.setProfile(CamcorderProfile.get(CamcorderProfile.QUALITY_TIME_LAPSE_HIGH));
       mMediaRecorder.setOutputFile(mVideoFileName);
       mMediaRecorder.setCaptureRate(2);
       mMediaRecorder.setOrientationHint(mTotalRotation);
       mMediaRecorder.prepare();
   }

In the start record check whether to setup th MediaRecorder for recording or time-lapse

private void startRecord() {

    try {
        if(mIsRecording) {
            setupMediaRecorder();
        } else if(mIsTimelapse) {
            setupTimeLapse();
        }