Вообщем есть задача получения на пк, в реальном времени, видео с телефона, для теста выбрал плеер VLC(он же умеет проигрывать RTP потоки?!). Вообщем всё было написано, пакеты уходят, плеер принимает, но не воспроизводит, в чем проблема? Нужно использовать дополнительные протоколы RTCP, RTSP? Или косяк заполнения заголовков? Уже бьюсь немало времени над этим.
Видео получается в формате 3gp(h.263), звука нет.
Показания wireshark'а:
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No. Time Source Destination Protocol Info
215 14.180627 192.168.1.9 192.168.1.5 H.263 PT=ITU-T H.263, SSRC=0xBC614E, Seq=195, Time=133156 MODE B H263 payload
Frame 215: 1462 bytes on wire (11696 bits), 1462 bytes captured (11696 bits)
Arrival Time: Apr 29, 2011 19:54:52.599963000 Московское время (лето)
Epoch Time: 1304092492.599963000 seconds
[Time delta from previous captured frame: 0.055939000 seconds]
[Time delta from previous displayed frame: 0.055939000 seconds]
[Time since reference or first frame: 14.180627000 seconds]
Frame Number: 215
Frame Length: 1462 bytes (11696 bits)
Capture Length: 1462 bytes (11696 bits)
[Frame is marked: False]
[Frame is ignored: False]
[Protocols in frame: eth:ip:udp:rtp:rfc2190:h263]
[Coloring Rule Name: UDP]
[Coloring Rule String: udp]
Ethernet II, Src: MurataMa_a1:35:73 (00:26:e8:a1:35:73), Dst: Giga-Byt_86:07:fd (1c:6f:65:86:07:fd)
Destination: Giga-Byt_86:07:fd (1c:6f:65:86:07:fd)
Address: Giga-Byt_86:07:fd (1c:6f:65:86:07:fd)
.... ...0 .... .... .... .... = IG bit: Individual address (unicast)
.... ..0. .... .... .... .... = LG bit: Globally unique address (factory default)
Source: MurataMa_a1:35:73 (00:26:e8:a1:35:73)
Address: MurataMa_a1:35:73 (00:26:e8:a1:35:73)
.... ...0 .... .... .... .... = IG bit: Individual address (unicast)
.... ..0. .... .... .... .... = LG bit: Globally unique address (factory default)
Type: IP (0x0800)
Internet Protocol, Src: 192.168.1.9 (192.168.1.9), Dst: 192.168.1.5 (192.168.1.5)
Version: 4
Header length: 20 bytes
Differentiated Services Field: 0x00 (DSCP 0x00: Default; ECN: 0x00)
0000 00.. = Differentiated Services Codepoint: Default (0x00)
.... ..0. = ECN-Capable Transport (ECT): 0
.... ...0 = ECN-CE: 0
Total Length: 1448
Identification: 0x9541 (38209)
Flags: 0x02 (Don't Fragment)
0... .... = Reserved bit: Not set
.1.. .... = Don't fragment: Set
..0. .... = More fragments: Not set
Fragment offset: 0
Time to live: 64
Protocol: UDP (17)
Header checksum: 0x1ca5 [correct]
[Good: True]
[Bad: False]
Source: 192.168.1.9 (192.168.1.9)
Destination: 192.168.1.5 (192.168.1.5)
User Datagram Protocol, Src Port: 59423 (59423), Dst Port: krb524 (4444)
Source port: 59423 (59423)
Destination port: krb524 (4444)
Length: 1428
Checksum: 0xcb58 [validation disabled]
[Good Checksum: False]
[Bad Checksum: False]
Real-Time Transport Protocol
10.. .... = Version: RFC 1889 Version (2)
..0. .... = Padding: False
...0 .... = Extension: False
.... 0000 = Contributing source identifiers count: 0
0... .... = Marker: False
Payload type: ITU-T H.263 (34)
Sequence number: 195
Timestamp: 133156
Synchronization Source identifier: 0x00bc614e (12345678)
H.263 RTP Payload header (RFC2190)
F: True
p/b frame: False
Start bit position: 4
End bit position: 1
SRC format: CIF 352x288 (3)
Quantizer: 7
GOB Number: 0
Macroblock address: 6
Reserved field: 0
Inter-coded frame: True
Motion vector: False
Syntax-based arithmetic coding: False
Advanced prediction option: False
Horizontal motion vector 1: 120
Vertical motion vector 1: 2
Horizontal motion vector 2: 0
Vertical motion vector 2: 0
ITU-T Recommendation H.263
H.263 stream: fbefbefbefbeeeeafb19e17bdcefbee1da48254dfdae0656...
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класс rtp пакета
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package nd.test.video.net;
import java.net.DatagramPacket;
import java.util.BitSet;
import android.os.SystemClock;
public class RTPpacket {
//размерности
private int HEADER_SIZE = 12;
private int PAYLOAD_SIZE = 0;
private int CODEC_HEADER_SIZE = 2;
//поля заголовка
private byte version;
private byte padding;
private byte extension;
private byte CC;
private byte marker;
private byte payload_type;
private short sequence_number;
private int time_stamp;
private int SSRC;
//заголовок и данные
private byte[] header;
private byte[] payload;
private byte[] codec_header;
//RTP пакет
private DatagramPacket rtp_packet;
//конструктор
public RTPpacket(byte[] data, int size, short cseq, int ts, int ssrc)
{
//поля заголовка
version = 2;
padding = 0;
extension = 0;
CC = 0;
marker = 0;
PAYLOAD_SIZE = size;
sequence_number = cseq;
time_stamp = ts;
SSRC = ssrc;
/*
* F=0, P=1, SBIT=0, EBIT=5,
* SRC= 3(CIF), I=0, U=0, S=0,
* A=0, R=0, DBQ=0, TRB=0,
* TR=0
* */
header = new byte[HEADER_SIZE];
payload = new byte[PAYLOAD_SIZE];
codec_header = new byte[]{
(byte)0x05, (byte)0x60,
(byte)0x00, (byte)0x00};
codec_header[0] ^= 1<<30;
payload = data;
BitSet bitset = new BitSet(16);
//version = 2
bitset.flip(15);
//padding = 1
bitset.flip(13);
//payload type = 34
bitset.flip(1);
bitset.flip(5);
//marker = 1
bitset.flip(7);
byte[] temp = toByteArray(bitset);
header[0] = temp[1];
header[1] = temp[2];
byte[] temp2 = short_to_byte_array(sequence_number);
header[2] = temp2[0];
header[3] = temp2[1];
byte[] temp3 = int_to_byte_array(time_stamp);
header[4] = temp3[0];
header[5] = temp3[1];
header[6] = temp3[2];
header[7] = temp3[3];
byte[] temp4 = int_to_byte_array(SSRC);
header[8] = temp4[0];
header[9] = temp4[1];
header[10] = temp4[2];
header[11] = temp4[3];
}
public byte[] toByteArray(BitSet bits)
{
byte[] bytes = new byte[bits.length()/8+1];
for (int i=0; i<bits.length(); i++)
if (bits.get(i))
bytes[bytes.length-i/8-1] |= 1<<(i%8);
return bytes;
}
public static byte[] short_to_byte_array(short number)
{
return new byte[]{(byte)(number >>> 8),(byte)(number)};
}
public static byte[] int_to_byte_array(int number)
{
return new byte[]{(byte)(number >>> 24), (byte)(number >>> 16), (byte)(number >>> 8), (byte)(number)};
}
private void make_packet()
{
byte[] packet = new byte[HEADER_SIZE + PAYLOAD_SIZE];
for(int i = 0; i < HEADER_SIZE; i++)
packet[i] = header[i];
for(int i = 0; i < PAYLOAD_SIZE; i++)
packet[i+HEADER_SIZE] = payload[i];
rtp_packet = new DatagramPacket(payload, HEADER_SIZE + CODEC_HEADER_SIZE + PAYLOAD_SIZE);
}
public byte[] get_packet()
{
return rtp_packet;
}
public byte[] get_packet_data()
{
byte[] packet = new byte[HEADER_SIZE + CODEC_HEADER_SIZE + PAYLOAD_SIZE];
for(int i = 0; i < HEADER_SIZE; i++)
packet[i] = header[i];
for(int i = 0; i < CODEC_HEADER_SIZE; i++)
packet[i + HEADER_SIZE] = codec_header[i];
for(int i = 0; i < PAYLOAD_SIZE; i++)
packet[i + HEADER_SIZE + CODEC_HEADER_SIZE] = payload[i];
return packet;
}
public int get_size()
{
return HEADER_SIZE + CODEC_HEADER_SIZE + PAYLOAD_SIZE;
}
}
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