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Content:	!1000278 // jcodec library import static org.jcodec.common.NIOUtils.writableFileChannel; import java.io.File; import java.nio.ByteBuffer; import java.util.Arrays; import org.jcodec.codecs.raw.V210Encoder; import org.jcodec.common.model.ColorSpace; import org.jcodec.common.model.Picture; import org.jcodec.common.model.Size; import org.jcodec.containers.mp4.muxer.FramesMP4MuxerTrack; import org.jcodec.containers.mp4.muxer.MP4Muxer; import org.jcodec.containers.mp4.MP4Packet; /** * This class is part of JCodec ( www.jcodec.org ) This software is distributed * under FreeBSD License * * This code generates two dark gradients 8bit and 10 bit quantization and saves * it into v210 mov * * @author Jay Codec * / public class main { public static void main(String[] args) throws Exception { if (args.length == 0) args = new String[] {"out.mov", "200"}; if (args.length < 2) { System.out.println("<out mov> <n frames>"); return; } System.out.println("Writing movie: " + args[0]); int width = 640; int height = 480; Picture pic = Picture.create(width, height, ColorSpace.YUV422_10); Arrays.fill(pic.getPlaneData(1), 512); Arrays.fill(pic.getPlaneData(2), 512); drawGrad(pic.getPlaneData(0), new Size(pic.getWidth(), pic.getHeight())); V210Encoder encoder = new V210Encoder(); MP4Muxer muxer = new MP4Muxer(writableFileChannel(new File(args[0]))); ByteBuffer out = ByteBuffer.allocate(width height * 10); ByteBuffer frame = encoder.encodeFrame(out, pic); FramesMP4MuxerTrack videoTrack = muxer.addVideoTrack("v210", new Size(width, height), "jcodec", 24000); for (int i = 0; i < Integer.parseInt(args[1]); i++) { videoTrack.addFrame(new MP4Packet(frame, i * 1001, 24000, 1001, i, true, null, i * 1001, 0)); } muxer.writeHeader(); System.out.println("Done writing movie."); } private static void drawGrad(int[] y, Size ySize) { int blockX = ySize.getWidth() / 10; int blockY = ySize.getHeight() / 7; fillGrad(y, ySize.getWidth(), blockX, blockY, 9 * blockX, 3 * blockY, 0.2, 0.1, 8); fillGrad(y, ySize.getWidth(), blockX, 4 * blockY, 9 * blockX, 6 * blockY, 0.2, 0.1, 10); } private static void fillGrad(int[] y, int stride, int left, int top, int right, int bottom, double from, double to, int quant) { int step = stride + left - right; int off = top * stride + left; for (int j = top; j < bottom; j++) { for (int i = left; i < right; i++) { y[off++] = colr(((double) i - left) / (right - left), ((double) j - top) / (bottom - top), from, to, quant); } off += step; } } private static int colr(double i, double j, double from, double to, int quant) { int val = ((int) ((1 << quant) * (from + (to - from) * i))) << (10 - quant); return val; } }
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Created:	2015-05-19 20:54:38

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