編碼從PNG圖像h264視頻...在JAVA

Question

有沒有免費的可用jar文件的某處，可以幫助我將一組png文件轉換爲.avi文件？

只是尋找一個兼容java的編解碼器，不需要過時的JMF。

謝謝大家！

Answer 1

我沒有看到糟糕的java解決方案，但您可以嘗試xuggler與它的ffmpeg修整器。

Answer 2

JCodec（http://jcodec.org）是你在找什麼。它是一個開源的純Java視頻編解碼器庫。它目前不支持AVI，但恕我直言MP4格式更適合H.264。

在你決定去與JCodec情況下，這裏有一個樣本類，你可以使用：

public class SequenceEncoder { 
    private SeekableByteChannel ch; 
    private Picture toEncode; 
    private RgbToYuv420 transform; 
    private H264Encoder encoder; 
    private ArrayList<ByteBuffer> spsList; 
    private ArrayList<ByteBuffer> ppsList; 
    private CompressedTrack outTrack; 
    private ByteBuffer _out; 
    private int frameNo; 
    private MP4Muxer muxer; 

    public SequenceEncoder(File out) throws IOException { 
     this.ch = NIOUtils.writableFileChannel(out); 

     // Transform to convert between RGB and YUV 
     transform = new RgbToYuv420(0, 0); 

     // Muxer that will store the encoded frames 
     muxer = new MP4Muxer(ch, Brand.MP4); 

     // Add video track to muxer 
     outTrack = muxer.addTrackForCompressed(TrackType.VIDEO, 25); 

     // Allocate a buffer big enough to hold output frames 
     _out = ByteBuffer.allocate(1920 * 1080 * 6); 

     // Create an instance of encoder 
     encoder = new H264Encoder(); 

     // Encoder extra data (SPS, PPS) to be stored in a special place of 
     // MP4 
     spsList = new ArrayList<ByteBuffer>(); 
     ppsList = new ArrayList<ByteBuffer>(); 

    } 

    public void encodeImage(BufferedImage bi) throws IOException { 
     if (toEncode == null) { 
      toEncode = Picture.create(bi.getWidth(), bi.getHeight(), ColorSpace.YUV420); 
     } 

     // Perform conversion 
     for (int i = 0; i < 3; i++) 
      Arrays.fill(toEncode.getData()[i], 0); 
     transform.transform(AWTUtil.fromBufferedImage(bi), toEncode); 

     // Encode image into H.264 frame, the result is stored in '_out' buffer 
     _out.clear(); 
     ByteBuffer result = encoder.encodeFrame(_out, toEncode); 

     // Based on the frame above form correct MP4 packet 
     spsList.clear(); 
     ppsList.clear(); 
     H264Utils.encodeMOVPacket(result, spsList, ppsList); 

     // Add packet to video track 
     outTrack.addFrame(new MP4Packet(result, frameNo, 25, 1, frameNo, true, null, frameNo, 0)); 

     frameNo++; 
    } 

    public void finish() throws IOException { 
     // Push saved SPS/PPS to a special storage in MP4 
     outTrack.addSampleEntry(H264Utils.createMOVSampleEntry(spsList, ppsList)); 

     // Write MP4 header and finalize recording 
     muxer.writeHeader(); 
     NIOUtils.closeQuietly(ch); 
    } 

    public static void main(String[] args) throws IOException { 
     SequenceEncoder encoder = new SequenceEncoder(new File("video.mp4")); 
     for (int i = 1; i < 100; i++) { 
      BufferedImage bi = ImageIO.read(new File(String.format("folder/img%08d.png", i))); 
      encoder.encodeImage(bi); 
     } 
     encoder.finish(); 
    } 
}