Example usage for android.media MediaMetadataRetriever OPTION_NEXT_SYNC

Introduction

In this page you can find the example usage for android.media MediaMetadataRetriever OPTION_NEXT_SYNC.

Prototype

int OPTION_NEXT_SYNC

To view the source code for android.media MediaMetadataRetriever OPTION_NEXT_SYNC.

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Document

This option is used with #getFrameAtTime(long,int) to retrieve a sync (or key) frame associated with a data source that is located right after or at the given time.

Usage

From source file:com.univpm.s1055802.faceplusplustester.Detect.AcquireVideo.java

/**
 * Estrae un frame per ogni secondo del video e li salva sul dispositivo
 * @param uri uri della cartella dove salvare i frames
 *///from   w w  w.j  a v a2  s .co  m
private void captureFrames(Uri uri) {
    String filePath = FileUtils.getPath(getApplicationContext(), uri);
    File video = new File(filePath);
    MediaMetadataRetriever retriever = new MediaMetadataRetriever();
    try {
        retriever.setDataSource(filePath);
        double duration = Double
                .parseDouble(retriever.extractMetadata(MediaMetadataRetriever.METADATA_KEY_DURATION));
        Log.v("duration", String.valueOf(duration));

        int timeSkip = 1000000;
        for (int i = 0; i < duration * 1000; i = i + timeSkip) {
            File img = null;
            try {
                img = new File(framesDir, "Frame_" + String.valueOf(i / timeSkip) + ".jpg");
                OutputStream fOut = null;
                fOut = new FileOutputStream(img);
                Bitmap imgBmp = retriever.getFrameAtTime(i, MediaMetadataRetriever.OPTION_NEXT_SYNC);
                imgBmp.compress(Bitmap.CompressFormat.JPEG, 85, fOut);
                fOut.flush();
                fOut.close();
            } catch (IOException e) {
                e.printStackTrace();
            }

        }
    } catch (IllegalArgumentException ex) {
        ex.printStackTrace();
    } catch (RuntimeException ex) {
        ex.printStackTrace();
    } finally {
        try {
            retriever.release();
        } catch (RuntimeException ex) {
        }
    }

}

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