Extract bitmap from video in android

Question

I am trying to extract all frames from a video.
By following code I want to fetch the first 30 frames of a video, but I got only first frame 30 times.

private ArrayList<Bitmap> getFrames(String path) {
    try {
        ArrayList<Bitmap> bArray = new ArrayList<Bitmap>();
        bArray.clear();
        MediaMetadataRetriever mRetriever = new MediaMetadataRetriever();
        mRetriever.setDataSource("/sdcard/myvideo.mp4");                    

        for (int i = 0; i < 30; i++) {
            bArray.add(mRetriever.getFrameAtTime(1000*i, 
                       MediaMetadataRetriever.OPTION_CLOSEST_SYNC));
        }
        return bArray;
    } catch (Exception e) { return null; }
}

Now, how can I get all frames from a video?

Answer 1

Video support in Android SDK is limited and frame extraction for H264 encoded videos is only possible for key frames. In order to extract an arbitrary frame, you'll need to use a library like FFmpegMediaMetadataRetriever which uses native code to extract data from the video. It is very fast, comes with precompiled binaries (for ARM and x86) so you don't need to delve into C++ and makefiles, is licensed under Apache 2.0 and it comes with a demo Android app.

There is also a pure Java library, JCodec but it's slower and when I used it last year the colors of the extracted frame were distorted.

Answer 2

you have to pass the path to this method...Perfectly working code ! hope it helpfull

gradle-- implementation 'com.github.wseemann:FFmpegMediaMetadataRetriever-core:1.0.15'

public void VideoToGif(String uri) {
    Uri videoFileUri = Uri.parse(uri);

    FFmpegMediaMetadataRetriever retriever = new FFmpegMediaMetadataRetriever();
    retriever.setDataSource(uri);
    List<Bitmap> rev = new ArrayList<Bitmap>();
    MediaPlayer mp = MediaPlayer.create(GitToImage.this, videoFileUri);
    int millis = mp.getDuration();
    System.out.println("starting point");
    for (int i = 100000; i <=millis * 1000; i += 100000*2) {
        Bitmap bitmap = retriever.getFrameAtTime(i, FFmpegMediaMetadataRetriever.OPTION_CLOSEST);
        rev.add(bitmap);
    }

    GiftoImage((ArrayList) rev);
}