Solved

500: RTSP realplayer implementation

Posted on 2006-11-14
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Last Modified: 2008-01-09
Not sure if this is the most applicable topic area….please advise if you think differently…..
I have tried to implement a very basic rtsp server that negotiates with the client realplayer ™ Win32 version 10.5. However, the video is not playing on the client side and I get the error message – “A general error has occurred”. I cannot figure out why this is. I have tried to stream different files (.mpg and .wmv). I know that the video file is sent across the network because the ethereal trace proves it (as seen below) but the client only has a black screen coming up but nothing is played. Any clues on why this maybe? I want to get it working on both UDP and TCP but I started on TCP first because the negotiations are simpler. I have used TCP socket to listen on a particular port. When I compare both the ethereal trace of a successful RTSP streaming session with one of my failed ones then I do notice that all my packets are TCP only and not RTSP(as it should be) even though exactly the same bytes are sent, is this causing the problem. If so then how can implement and interpret data in to RTSP packets???? I am using PHP and only TCP and UDP sockets are available i.e. they don’t understand the rtsp//: protocol.

Any inputs will be much appreciated.........

The trace is found below:

OPTIONS rtsp://193.63.131.67:3001 RTSP/1.0 CSeq: 1 User-Agent: RealMedia Player (HelixDNAClient)/10.0.0.0 (win32) ClientChallenge: 0e6da7b9cb35056dc37265072aeaca55 ClientID: WinNT_5.1_6.0.12.1698_RealPlayer_RN30DL_en-us_UNK CompanyID: wymfa1UFf8sOX4/UuC15HA== GUID: 00000000-0000-0000-0000-000000000000 PlayerStarttime: [10/11/2006:18:09:59 00:00] Pragma: initiate-session RegionData: CF37 1RN

RTSP/1.0 200 OK
CSeq: 1
Date: Fri, 10 Nov 2006 18:09:55 +0000
Session: 1720561872-1
Server: Helix Server Version 9.0.6.1262 (linux-2.2-libc6-i586-server) (RealServer compatible)
Public: OPTIONS, DESCRIBE, ANNOUNCE, PLAY, SETUP, GET_PARAMETER, SET_PARAMETER, TEARDOWN
RealChallenge1: 6444b84fde531ae38a23136b3329d110 StatsMask: 3

DESCRIBE rtsp://193.63.131.67:3001/Blazer.mpeg RTSP/1.0
CSeq: 2
User-Agent: RealMedia Player (HelixDNAClient)/10.0.0.0 (win32)
Accept: application/sdp
Session: 1720561872-1
Bandwidth: 10485800
ClientID: WinNT_5.1_6.0.12.1698_RealPlayer_RN30DL_en-us_UNK
GUID: 00000000-0000-0000-0000-000000000000
Language: en-us
RegionData: CF37 1RN
Require: com.real.retain-entity-for-setup
SupportsMaximumASMBandwidth: 1
RTSP/1.0 200 OK
CSeq: 2
Date: Fri, 10 Nov 2006 18:09:55 +0000
Content-base: rtsp://193.63.131.67:3001/Blazer.mpeg/
ETag: 1720561872-1
Session: 1720561872-1
Content-type: application/sdp Content-length: 1504
v=0
o=- 1022199156 1022199156 IN IP4 193.63.131.67
s=Blazer.mpeg
i=<No author> <No copyright>
t=0 0
a=SdpplinVersion:1610641492
a=DefaultLicenseValue:integer;1
a=StreamCount:integer;2
a=Title:buffer;"bXBnMXZpZGVvLm1wZwA="
a=FileType:string;"MPEG1"
a=LicenseKey:string;"license.Summary.Datatypes.RealMPEG1.Enabled"
a=range:npt=0-7.845000
m=video 0 RTP/AVP 32
b=AS:1116
a=control:streamid=0
a=range:npt=0-7.845000
a=length:npt=7.845000
a=mimetype:string;"video/MPV"
a=Width:integer;320
a=StartTime:integer;0
a=AvgBitRate:integer;1116000
a=RMATimestampConversionFactor:integer;1
a=AvgPacketSize:integer;1024
a=RTPTimestampConversionFactor:integer;90
a=Height:integer;240
a=Preroll:integer;1500
a=HasOutOfOrderTs:integer;1
a=MaxPacketSize:integer;1500
a=MaxBitRate:integer;1674000
a=ASMRuleBook:string;"marker=0, Priority=9, timestampdelivery=true; marker=1, Priority=9, timestampdelivery=true;"
m=audio 0 RTP/AVP 14
b=AS:112
a=control:streamid=1
a=range:npt=0-7.845000
a=length:npt=7.845000
a=mimetype:string;"audio/MPA"
a=StartTime:integer;0
a=AvgBitRate:integer;112000
a=RMATimestampConversionFactor:integer;1
a=SampleRate:integer;44100
a=AvgPacketSize:integer;1024
a=RTPTimestampConversionFactor:integer;90
a=Preroll:integer;1500
a=NumChannels:integer;2
a=HasOutOfOrderTs:integer;1
a=MaxPacketSize:integer;1500
a=MaxBitRate:integer;168000
a=ASMRuleBook:string;"marker=0, Priority=9, timestampdelivery=true; marker=1, Priority=9, timestampdelivery=true;"
SETUP rtsp://193.63.131.67:3001/Blazer.mpeg/streamid=0 RTSP/1.0
CSeq: 3
RealChallenge2: db0062d0568e5e775e765f716c9b8d2901d0a8e3, sd=d6555568
RDTFeatureLevel: 2
Transport: x-pn-tng/tcp;mode=play,x-real-rdt/tcp;mode=play,RTP/AVP/TCP;unicast;mode=play
User-Agent: RealMedia Player (HelixDNAClient)/10.0.0.0 (win32)
If-Match: 1720561872-1
RTSP/1.0 200 OK
CSeq: 3
Date: Fri, 10 Nov 2006 18:09:55 +0000
Session: 1720561872-1
Reconnect: true
RealChallenge3: 2fe4384a4893ef35ce89ced60a2ba5864f213d09,sdr=234ecc0a
RDTFeatureLevel: 2
Transport: x-pn-tng/tcp;interleaved=0
SETUP rtsp://193.63.131.67:3001/Blazer.mpeg/streamid=1 RTSP/1.0
CSeq: 4
RDTFeatureLevel: 2
Transport: x-pn-tng/tcp;mode=play
User-Agent: RealMedia Player (HelixDNAClient)/10.0.0.0 (win32)
Session: 1720561872-1
RTSP/1.0 200 OK
CSeq: 4
Date: Fri, 10 Nov 2006 18:09:55 +0000
Session: 1720561872-1
RDTFeatureLevel: 2
Transport: x-pn-tng/tcp;interleaved=0

SET_PARAMETER rtsp://193.63.131.67:3001/Blazer.mpeg RTSP/1.0
CSeq: 5
Subscribe: stream=0;rule=0,stream=0;rule=1,stream=1;rule=0,stream=1;rule=1
Session: 1720561872-1
PLAY rtsp://193.63.131.67:3001/Blazer.mpeg RTSP/1.0
CSeq: 6
User-Agent: RealMedia Player (HelixDNAClient)/10.0.0.0 (win32)
Session: 1720561872-1 Range: npt=0-7.844000

RTSP/1.0 200 OK
CSeq: 5 Date: Fri, 10 Nov 2006 18:09:55 +0000 Session: 1720561872-1
RTSP/1.0 200 OK CSeq: 6 Date: Fri, 10 Nov 2006 18:09:55 +0000 RTP-Info: url=rtsp://193.63.131.67:3001/Blazer.mpeg/streamid=0;seq=0;rtptime=0
 
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 128x96, 30.00fps, I:P:B of 1:3:2
 Logrithmic. mot. est., radius 16
 fixed rate 140000 b/s
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.Rest of file transfer….
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Comment
Question by:smotbd
3 Comments
 
LVL 7

Accepted Solution

by:
dlangr earned 500 total points
ID: 17942568
I know of no rtsp streaming server implementations in php, probably for a good reason. You should probably use something like http://developer.apple.com/opensource/server/streaming/index.html and use php to serve a link to the content.

i might be wrong ofcourse, but using php alone does not seem feasable.
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