问CoreAVC和Java

EN

FileChannelWrapper ch = null;
try {
    ch = NIOUtils.readableFileChannel(new File("path to mp4"));
    FrameGrab frameGrab = new FrameGrab(ch);

    frameGrab.seek(351.); // important to pass double for a second
    BufferedImage frame;
    for (int i = 0; (frame = frameGrab.getFrame()) != null && i < 200; i++) {
        ImageIO.write(frame, "jpg", new File(String.format("frame%08d.png", i)));
    }
} finally {
    NIOUtils.closeQuietly(ch);
}