public ByteBuffer transcodeFrame(ByteBuffer src, ByteBuffer dst) throws IOException {
if (src == null) return null;
Picture8Bit decoded = decoder.decodeFrame8Bit(src, pic0.getData());
if (pic1 == null) {
pic1 =
Picture8Bit.create(
decoded.getWidth(), decoded.getHeight(), encoder.getSupportedColorSpaces()[0]);
transform =
ColorUtil.getTransform8Bit(decoded.getColor(), encoder.getSupportedColorSpaces()[0]);
}
transform.transform(decoded, pic1);
pic1.setCrop(new Rect(0, 0, track.thumbWidth, track.thumbHeight));
int rate = TARGET_RATE;
do {
try {
encoder.encodeFrame8Bit(pic1, dst);
break;
} catch (BufferOverflowException ex) {
Logger.warn("Abandon frame, buffer too small: " + dst.capacity());
rate -= 10;
rc.setRate(rate);
}
} while (rate > 10);
rc.setRate(TARGET_RATE);
H264Utils.encodeMOVPacket(dst);
return dst;
}
private static void mux(FramesMP4MuxerTrack track, File f) throws IOException {
MappedH264ES es = new MappedH264ES(NIOUtils.map(f));
ArrayList<ByteBuffer> spsList = new ArrayList<ByteBuffer>();
ArrayList<ByteBuffer> ppsList = new ArrayList<ByteBuffer>();
Packet frame = null;
while ((frame = es.nextFrame()) != null) {
ByteBuffer data = frame.getData();
H264Utils.wipePS(data, spsList, ppsList);
H264Utils.encodeMOVPacket(data);
MP4Packet pkt = new MP4Packet(new Packet(frame, data), frame.getPts(), 0);
System.out.println(pkt.getFrameNo());
track.addFrame(pkt);
}
addSampleEntry(track, es.getSps(), es.getPps());
}
