Audio Video Transmitting and Receiving
Can anybody help me...to do following task...
I am doing some networking project where i need to send a video files from
one system and play it on other system using RTP without storing it.
I have seen some JMF example codes to transmit and receive videos but
problem is that both audio and video streams of a video file are not been properly
received or played back on receiving system ie for some files only audio is there and for
some only video is there...
I need to have some code so that both streams can be played together....
can anybody suggest me to this so that i can implement this properly
Its Urgent....
Genius-java wrote:
Its Urgent....In that case, it's probably too late to reply anyway. So sorry. Better luck next time!
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Problem with the examples of Transmitting and Receiving Custom RTP Payloads
I have tried the examples of this web:
http://java.sun.com/javase/technologies/desktop/media/jmf/2.1.1/solutions/CustomPayload.html
Transmitting and Receiving Custom RTP Payloads
I run the examples all right.
But I want to transmit the sound using my own format, so i want to change the file PcmPacketizer.java
and PcmDepacketizer.java
I think the sound data is in the byte[] inData ---- {byte[] inData = (byte[])inBuf.getData();}
so i change the data with my own function, so the inData have the diffrent length:
then i transmit the data with the packet header
public synchronized int process(Buffer inBuf, Buffer outBuf) {
int inLength = inBuf.getLength();
byte[] inData = (enbase((byte[])inBuf.getData()));
byte[] outData = (byte[])outBuf.getData();
if (outData == null || outData.length < PACKET_SIZE) {
outData = new byte[PACKET_SIZE];
outBuf.setData(outData);
// Generate the packet header.
int rate = (int)inFormat.getSampleRate();
int size = (int)inFormat.getSampleSizeInBits();
int channels = (int)inFormat.getChannels();
outData[0] = 0; // filler
outData[1] = (byte)((rate >> 16) & 0xff);
outData[2] = (byte)((rate >> 8) & 0xff);
outData[3] = (byte)(rate & 0xff);
outData[4] = (byte)inFormat.getSampleSizeInBits();
outData[5] = (byte)inFormat.getChannels();
outData[6] = (byte)inFormat.getEndian();
outData[7] = (byte)inFormat.getSigned();
int frameSize = inFormat.getSampleSizeInBits() * inFormat.getChannels();
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// The crucial info is the frame rate and size. These are used
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if (rate != (int)outFormat.getFrameRate() ||
frameSize != outFormat.getFrameSizeInBits()) {
outFormat = new AudioFormat(CUSTOM_PCM,
AudioFormat.NOT_SPECIFIED, // rate
AudioFormat.NOT_SPECIFIED, // size
AudioFormat.NOT_SPECIFIED, // channel
AudioFormat.NOT_SPECIFIED, // endian
AudioFormat.NOT_SPECIFIED, // signed
size * channels, // frame size
rate, // frame rate
null);
if (inLength + historyLength >= DATA_SIZE) {
// Enough data for one packet.
int copyFromHistory = Math.min(historyLength, DATA_SIZE);
System.arraycopy(history, 0, outData, HDR_SIZE , copyFromHistory);
int remainingBytes = DATA_SIZE - copyFromHistory;
System.arraycopy(inData, inBuf.getOffset(),
outData, copyFromHistory + HDR_SIZE, remainingBytes);
historyLength -= copyFromHistory;
inBuf.setOffset( inBuf.getOffset() + remainingBytes);
inBuf.setLength( inLength - remainingBytes);
outBuf.setFormat(outFormat);
outBuf.setLength(PACKET_SIZE);
outBuf.setOffset(0);
return INPUT_BUFFER_NOT_CONSUMED ;
if (inBuf.isEOM()) { // last packet
System.arraycopy(history, 0, outData, HDR_SIZE, historyLength);
System.arraycopy(inData, inBuf.getOffset(),
outData, historyLength + HDR_SIZE, inLength);
outBuf.setFormat(outFormat);
outBuf.setLength(inLength + historyLength + HDR_SIZE);
outBuf.setOffset(0);
historyLength = 0;
return BUFFER_PROCESSED_OK;
// Not enough data for one packet. Save the remainder
// for next time.
System.arraycopy(inData, inBuf.getOffset(),
history, historyLength,inLength) ;
historyLength += inLength;
return OUTPUT_BUFFER_NOT_FILLED ;
I think I change the data use my own function debase(), so i should decode the data in the file:PcmDepacketizer.java
but int PcmDepacketizer.java the example is so simple that i don't know how to find and change the data.
there is only a few lines here:
Object outData = outBuf.getData();
outBuf.setData(inBuf.getData());
inBuf.setData(outData);
outBuf.setLength(inBuf.getLength() - HDR_SIZE);
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System.out.println("the outBuf length is "+inBuf.getLength());
I write a function : public static byte [] debase(byte[] str)
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//os.write(t[j],(3*i+j),1);
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