Java NIOUtils.writableFileChannel方法代码示例

import org.jcodec.common.NIOUtils; //导入方法依赖的package包/类
public SequenceEncoderMp4(File out)
        throws IOException
{
    super(out);
    this.ch = NIOUtils.writableFileChannel(out);

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

    // Add video track to muxer
    outTrack = muxer.addTrack(TrackType.VIDEO, 5);

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

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

    // Transform to convert between RGB and YUV
    transform = ColorUtil.getTransform(ColorSpace.RGB, encoder.getSupportedColorSpaces()[0]);

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

import org.jcodec.common.NIOUtils; //导入方法依赖的package包/类
public SequenceEncoderMp4(File out)
        throws IOException
{
    super(out);
    this.ch = NIOUtils.writableFileChannel(out);

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

    // Add video track to muxer
    outTrack = muxer.addTrack(TrackType.VIDEO, timeScale);

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

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

    // Transform to convert between RGB and YUV
    transform = ColorUtil.getTransform(ColorSpace.RGB, encoder.getSupportedColorSpaces()[0]);

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

import org.jcodec.common.NIOUtils; //导入方法依赖的package包/类
public SequenceImagesEncoder(File out, int screenWidth, int screenHeight) 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, timescale);

    // Allocate a buffer big enough to hold output frames
    _out = ByteBuffer.allocate(screenWidth * screenHeight * 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>();

}
 

import org.jcodec.common.NIOUtils; //导入方法依赖的package包/类
public SequenceEncoder(File out, int frameRate) 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, frameRate);// original frmae rate is 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>();

}
 

import org.jcodec.common.NIOUtils; //导入方法依赖的package包/类
public SequenceEncoder(File out) throws IOException {
    this.ch = NIOUtils.writableFileChannel(out);

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

    // Add video track to muxer
    outTrack = muxer.addTrack(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();

    // Transform to convert between RGB and YUV
    transform = ColorUtil.getTransform(ColorSpace.RGB, encoder.getSupportedColorSpaces()[0]);

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

}
 

import org.jcodec.common.NIOUtils; //导入方法依赖的package包/类
public static void main(String[] args) throws IOException {
    FilePool fp = new FilePool(new File(args[0]), 10);
    MPSTrackFactory factory = new MPSTrackFactory(NIOUtils.fetchFrom(new File(args[1])), fp);
    Stream stream = factory.getVideoStreams().get(0);
    FileChannelWrapper ch = NIOUtils.writableFileChannel(new File(args[2]));

    List<VirtualPacket> pkt = new ArrayList<VirtualPacket>();
    for (int i = 0; i < 2000; i++) {
        pkt.add(stream.nextPacket());
    }

    for (VirtualPacket virtualPacket : pkt) {
        ch.write(virtualPacket.getData());
    }

    ch.close();
}
 

import org.jcodec.common.NIOUtils; //导入方法依赖的package包/类
public static void main(String[] args) throws IOException {
    FilePool fp = new FilePool(new File(args[0]), 10);
    MTSTrackFactory factory = new MTSTrackFactory(NIOUtils.fetchFrom(new File(args[1])), fp);
    Stream stream = factory.getVideoStreams().get(0);
    FileChannelWrapper ch = NIOUtils.writableFileChannel(new File(args[2]));

    List<VirtualPacket> pkt = new ArrayList<VirtualPacket>();
    for (int i = 0; i < 2000; i++) {
        pkt.add(stream.nextPacket());
    }

    for (VirtualPacket virtualPacket : pkt) {
        ch.write(virtualPacket.getData());
    }

    ch.close();
}
 

import org.jcodec.common.NIOUtils; //导入方法依赖的package包/类
public Encoder(File out, int width, int height) throws IOException {
    this.ch = NIOUtils.writableFileChannel(out);
    _out = ByteBuffer.allocate(width * height * 6);
    encoder = new H264Encoder();
    spsList = new ArrayList<ByteBuffer>();
    ppsList = new ArrayList<ByteBuffer>();


    this.ch = NIOUtils.writableFileChannel(out);
    muxer = new MP4Muxer(ch, Brand.MP4);
    outTrack = muxer.addTrackForCompressed(TrackType.VIDEO, 25);
}
 

import org.jcodec.common.NIOUtils; //导入方法依赖的package包/类
/**
 * NALProcessor to mux a raw h264 stream into a mp4 file
 * 
 * @param file File to save to
 * @param fps frame rate of the video
 * @param width Width of the video
 * @param height Height of the video
 * @throws IOException 
 */
public MP4H264Muxer(File file, int fps, int width, int height) throws IOException
{
   this.width = width;
   this.height = height;

   channel = NIOUtils.writableFileChannel(file);
   muxer = new MP4Muxer(channel);

   timescale = fps;
   track = muxer.addTrack(TrackType.VIDEO, timescale);
}
 

import org.jcodec.common.NIOUtils; //导入方法依赖的package包/类
/**
 * Create an MP4 file with MJPEG
 * 
 * @param file Output file
 * @param width Frame width
 * @param height Frame height
 * @param framerate
 * @param quality JPEG quality 0 - 100
 * @throws IOException
 */
public MP4MJPEGMovieBuilder(File file, int width, int height, int framerate, int quality) throws IOException
{
   channel = NIOUtils.writableFileChannel(file);
   muxer = new MP4Muxer(channel);

   timescale = framerate;
   track = muxer.addTrack(TrackType.VIDEO, timescale);

   this.width = width;
   this.height = height;
   this.quality = quality;
}
 

import org.jcodec.common.NIOUtils; //导入方法依赖的package包/类
public SequenceMuxer(File out) throws IOException {
    this.ch = NIOUtils.writableFileChannel(out);

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

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

import org.jcodec.common.NIOUtils; //导入方法依赖的package包/类
public static void main(String[] args) throws IOException {
    FileChannelWrapper ch = null;
    FileChannelWrapper out = null;
    try {
        ch = NIOUtils.readableFileChannel(new File(args[0]));
        out = NIOUtils.writableFileChannel(new File(args[1]));
        new MKVShiftTimecodes(Integer.parseInt(args[2])).run(ch, out);
    } finally {
        NIOUtils.closeQuietly(ch);
        NIOUtils.closeQuietly(out);
    }
}
 

import org.jcodec.common.NIOUtils; //导入方法依赖的package包/类
public static void saveRawFrame(ByteBuffer data, AvcCBox avcC, File f) throws IOException {
    SeekableByteChannel raw = NIOUtils.writableFileChannel(f);
    saveStreamParams(avcC, raw);
    raw.write(data.duplicate());
    raw.close();
}