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[英]Decoding an RTP stream with H264 data on Android Using MediaCodec
[英]MediaCodec not decoding H264 encoded video data
我正在開發一個可以通過RTP接收H264編碼數據的應用程序,但是我很難讓Android的MediaCodec輸出任何內容。 我正在對RTP數據包進行解包,如此處所述https://stackoverflow.com/a/7668578/10788248
編碼幀重新組合后,我將其輸入到出隊的輸入緩沖區中。
對輸入緩沖區進行排隊時,沒有任何錯誤,但是解碼器的回調永遠不會調用onOutputBufferAvailable方法。
我能夠調用它的唯一方法是傳遞流結束標志,然后輸出大小為0。
我的問題是,“我顯然有什么錯嗎?” 以及“哪些潛在問題可能導致輸出緩沖區永遠不可用,但編解碼器沒有拋出錯誤?”
代碼已更新
LinkedList<DatagramPacket> packets = new LinkedList<>();
Thread socketReader = new Thread(() -> {
try {
DatagramSocket socket = new DatagramSocket(videoPort);
socket.connect(InetAddress.getByName(remoteAddress),remotePort);
byte[] b;
while (true){
b = new byte[1500];
DatagramPacket p = new DatagramPacket(b,1500);
socket.receive(p);
//Log.d(TAG,"RTP: "+bytesToHex(p.getData()));
packets.add(p);
}
} catch (Exception e) {
e.printStackTrace();
}
});
@SuppressLint({"NewApi", "LocalSuppress"}) Thread packetHandler = new Thread(() -> {
try {
MediaCodec decoder = MediaCodec.createDecoderByType(MIME_TYPE);
MediaFormat decoderFormat = MediaFormat.createVideoFormat(MIME_TYPE, 1280, 720);
LinkedList<ByteBuffer> decoderInputs = new LinkedList<>();
LinkedList<Integer> decoderIndices = new LinkedList<>();
decoder.setCallback(new MediaCodec.Callback() {
@Override
public void onInputBufferAvailable(@NonNull MediaCodec codec, int index) {
decoderInputs.add(codec.getInputBuffer(index));
decoderIndices.add(new Integer(index));
}
@Override
public void onOutputBufferAvailable(@NonNull MediaCodec codec, int index, @NonNull MediaCodec.BufferInfo info) {
Log.d(TAG,"OUTPUT AVAILABLE!!!!");
Log.d(TAG, String.valueOf(info.size));
}
@Override
public void onError(@NonNull MediaCodec codec, @NonNull MediaCodec.CodecException e) {
Log.e(TAG,e.toString());
}
@Override
public void onOutputFormatChanged(@NonNull MediaCodec codec, @NonNull MediaFormat format) {
Log.d(TAG,"FORMAT CHANGED");
}
});
decoder.configure(decoderFormat, null,null,0);
decoder.start();
RTPFrame frame = new RTPFrame();
boolean sps = false;
boolean pps = false;
while (true){
if(decoderIndices.peek()!=null){
DatagramPacket packet = packets.poll();
if(packet!=null){
byte[] data = packet.getData();
if(frame==null||(!frame.isInitialized())){
frame = new RTPFrame(data);
}
else{
if(frame.isComplete()){
Integer index = null;
ByteBuffer decoderInput = null;
try {
decoderInput = decoderInputs.poll().put(frame.getFrame());
index = decoderIndices.poll();
int size = frame.getFrameSize();
if (frame.SPS) {
Log.d(TAG,"Depacketized at "+Integer.toUnsignedString(frame.getTime())+" length = "+frame.getFrameSize()+": " + bytesToHex(frame.getFrame().array()));
decoder.queueInputBuffer(index, 0, size, frame.getTime(), MediaCodec.BUFFER_FLAG_CODEC_CONFIG);
sps = true;
pps = false;
} else if (frame.PPS) {
if(sps){
Log.d(TAG,"Depacketized at "+Integer.toUnsignedString(frame.getTime())+" length = "+frame.getFrameSize()+": " + bytesToHex(frame.getFrame().array()));
decoder.queueInputBuffer(index, 0, size, frame.getTime(), MediaCodec.BUFFER_FLAG_CODEC_CONFIG);
pps = true;
}
} else if (!frame.badFrame) {
if(sps&&pps){
Log.d(TAG,"Depacketized at "+Integer.toUnsignedString(frame.getTime())+" length = "+frame.getFrameSize()+": " + bytesToHex(frame.getFrame().array()));
decoder.queueInputBuffer(index, 0, size, frame.getTime(), 0);
}
}
else{
throw new RuntimeException();
}
}
catch(Exception e){
e.printStackTrace();
if(index!=null){
decoderIndices.push(index);
}
decoderInput.clear();
decoderInputs.push(decoderInput);
}
frame = new RTPFrame();
}
else{
frame.addNALUnit(data);
}
}
if(frame.isComplete()){
Integer index = null;
ByteBuffer decoderInput = null;
try {
decoderInput = decoderInputs.poll().put(frame.getFrame());
index = decoderIndices.poll();
int size = frame.getFrameSize();
if (frame.SPS) {
Log.d(TAG,"Depacketized at "+Integer.toUnsignedString(frame.getTime())+" length = "+frame.getFrameSize()+": " + bytesToHex(frame.getFrame().array()));
decoder.queueInputBuffer(index, 0, size, frame.getTime(), MediaCodec.BUFFER_FLAG_CODEC_CONFIG);
sps = true;
pps = false;
} else if (frame.PPS) {
if(sps){
Log.d(TAG,"Depacketized at "+Integer.toUnsignedString(frame.getTime())+" length = "+frame.getFrameSize()+": " + bytesToHex(frame.getFrame().array()));
decoder.queueInputBuffer(index, 0, size, frame.getTime(), MediaCodec.BUFFER_FLAG_CODEC_CONFIG);
pps = true;
}
} else if (!frame.badFrame) {
if(sps&&pps){
Log.d(TAG,"Depacketized at "+Integer.toUnsignedString(frame.getTime())+" length = "+frame.getFrameSize()+": " + bytesToHex(frame.getFrame().array()));
decoder.queueInputBuffer(index, 0, size, frame.getTime(), 0);
}
}
else{
throw new Exception("bad frame");
}
}
catch(Exception e){
e.printStackTrace();
if(index!=null){
decoderIndices.push(index);
}
decoderInput.clear();
decoderInputs.push(decoderInput);
}
frame = new RTPFrame();
}
}
}
}
} catch (Exception e) {e.printStackTrace();}
});
這是我在一幀中收到的所有NAL單元的示例,以及如何對它們進行拆包。
RTP:80 63 00 2D 27 0E 64 30 66 B4 BA 42 3C 81 E0 00 80 6F ...
RTP:80 63 00 2E 27 0E 64 30 66 B4 BA 42 3C 01 F3 0F E0 3F ...
RTP:80 63 00 2F 27 0E 64 30 66 B4 BA 42 3C 01 37 9B FA BA ...
RTP:80 63 00 30 27 0E 64 30 66 B4 BA 42 3C 01 7F EA 75 7C ...
RTP:80 63 00 31 27 0E 64 30 66 B4 BA 42 3C 01 FA D8 A9 FF ...
RTP:80 63 00 32 27 0E 64 30 66 B4 BA 42 3C 01 1B C5 BC C0 ...
RTP:80 63 00 33 27 0E 64 30 66 B4 BA 42 3C 01 0F F4 9A DE ...
RTP:80 63 00 34 27 0E 64 30 66 B4 BA 42 3C 01 F4 35 CD 28 ...
RTP:80 63 00 35 27 0E 64 30 66 B4 BA 42 3C 01 9E 45 70 13 ...
RTP:80 E3 00 36 27 0E 64 30 66 B4 BA 42 3C 41 0F 18 0D 83 ...
D / RTPreader:以2985639104長度= 12611:00 00 00 01 21 E0 00 80 6F F0 B4 24 CD 5F 45 80 79 6E 0C ...
這是拆包前后的示例SPS和PPS
RTP:80 63 00 00 5F DF A1 70 4F 2F 8A 3E 27 42 00 1F 8D 68 05 00 5B A1 00 00 03 00 01 00 00 03 00 1E 0F 10 7A 80
以1608491376長度= 27:00 00 01 27 42 00 1F拆封的數據包A1 00 00 03 03 00 01 00 00 03 00 1E 0F 10 7A 80
以1608491376長度= 7:00 00 01 28 CE 32 48拆包
RTP:80 63 00 01 5F DF A1 70 4F 2F 8A 3E 28 CE 32 48
我要感謝@ greeble31和@ChrisBe在解決問題方面所提供的幫助。 問題確實出在我的RTPFrame類上。 具體來說,方法getFrame()
遍歷包含NAL單元數據的ByteBuffer列表,並使用put(ByteBuffer)
將它們添加到bb
。 這樣就增加了bb
的position
,直到等於limit
。
public ByteBuffer getFrame() {
size = 4;
int nalCount = nalUnits.size();
for (int i = 0;i<nalCount;i++){
size+=nalUnits.get(i).data.length;
}
ByteBuffer bb = ByteBuffer.allocate(size);
bb.put(new byte[]{0,0,0,1});
for(NALUnit unit:nalUnits){
bb.put(unit.data);
}
return bb;
}
改變return bb;
return (ByteBuffer)bb.position(0);
解決了這個問題。
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