I am trying to add optional unicast support to my stream server which currently runs great using multicast. I have implemented a custom DeviceFrameSource class extending FramedSource to control my MPEG4 encoder hardware. This is working great using multicast. To get it to run using unicast I based the code on wis-streamer and created a custom MediaSubSession class extending OnDemandServerMediaSubsession.
When a client connects it gets fairly far, parses the DESCRIBE, creates the stream source and rtpsink, connects to the encoder and gets two frames to create SDP, sends back the SDP, gets a SETUP command and creates the stream source again and the RTPSink/MPEG4ESVideoRTPSink, sends the response to SETUP, and finally receives the play command. The debug trace is below. But when trying to get the first frame after receiving the PLAY command, it always seg faults. Some debug trace shows that it executes the GetNextFrame in FramedSource which calls doGetNextFrame on MPEG4DiscreteFramer, which calls getNextFrame on FramedSource again, where is fails. It basically does the same thing it does when getting the frames for the SDP call, but this time it fails. I thought it might be a problem with how I am passing the pointer to DeviceFrameSource class or something wrong with that class altogether, but it works while getting the SDP frames and when using multicast. The specific point of seg fault is at the call of doGetNextFrame() from within FramedSource::getNextFrame called from MPEG4VideoStreanDiscreteFramer::doGetNextFrame. Any insight would be greatly appreciated. Thanks, -mat Play this stream using the URL "rtsp://18.85.45.113:8554/videoStream" Created On Demand Server... accept()ed connection from 18.85.45.34 RTSPClientSession[0xd2720]::incomingRequestHandler1() read 134 bytes:OPTIONS rtsp://18.85.45.113:8554/videoStream RTSP/1.0 CSeq: 1 User-Agent: VLC media player (LIVE555 Streaming Media v2008.09.02) parseRTSPRequestString() returned cmdName "OPTIONS", urlPreSuffix "", urlSuffix "videoStream" sending response: RTSP/1.0 200 OK CSeq: 1 Date: Thu, Jan 01 1970 21:40:38 GMT Public: OPTIONS, DESCRIBE, SETUP, TEARDOWN, PLAY, PAUSE RTSPClientSession[0xd2720]::incomingRequestHandler1() read 160 bytes:DESCRIBE rtsp://18.85.45.113:8554/videoStream RTSP/1.0 CSeq: 2 Accept: application/sdp User-Agent: VLC media player (LIVE555 Streaming Media v2008.09.02) parseRTSPRequestString() returned cmdName "DESCRIBE", urlPreSuffix "", urlSuffix "videoStream" Creating New Stream Source... Creating New RTP Sink Buffer Set... Creating New MPEG4ESVideoRTPSInk Created RTPSink... Get AUX SDP Line... MultiFramerRTPSink buildandsendpacket MultiFramerRTPSink packframe MultiFramerRTPSink getNextFrame FramedSource getnextframe FramedSource doinggetnextframe MPEG4DiscreteFramer doGetNextFrame FramedSource getnextframe FramedSource doinggetnextframe Spinner Video Debug: About to call requestframe... DEVICE Request Frame Spinner Video Debug: Got Frame at buffer 9 FramedSource donegetnextframe FramedSource donegetnextframe Checking for AUX SDP Line... Spinner Video Debug: About to capture frame.. MultiFramerRTPSink buildandsendpacket MultiFramerRTPSink packframe MultiFramerRTPSink buildandsendpacket MultiFramerRTPSink packframe MultiFramerRTPSink buildandsendpacket MultiFramerRTPSink packframe MultiFramerRTPSink getNextFrame FramedSource getnextframe FramedSource doinggetnextframe MPEG4DiscreteFramer doGetNextFrame FramedSource getnextframe FramedSource doinggetnextframe Spinner Video Debug: About to call requestframe... DEVICE Request Frame Spinner Video Debug: Got Frame at buffer 9 FramedSource donegetnextframe FramedSource donegetnextframe Checking for AUX SDP Line... Got AUX SDP Line... a=fmtp:96 profile-level-id=5;config=000001B005000001B509000001000000012000845D4C28B42190A31F sending response: RTSP/1.0 200 OK CSeq: 2 Date: Thu, Jan 01 1970 21:40:38 GMT Content-Base: rtsp://18.85.45.113:8554/videoStream/ Content-Type: application/sdp Content-Length: 491 v=0 o=- 78015985469 1 IN IP4 18.85.45.113 s=Session streamed by "spinner_video_server" i=spinner_video_session t=0 0 a=tool:LIVE555 Streaming Media v2008.12.19 a=type:broadcast a=control:* a=range:npt=0- a=x-qt-text-nam:Session streamed by "spinner_video_server" a=x-qt-text-inf:spinner_video_session m=video 0 RTP/AVP 96 c=IN IP4 0.0.0.0 a=rtpmap:96 MP4V-ES/90000 a=fmtp:96 profile-level-id=5;config=000001B005000001B509000001000000012000845D4C28B42190A31F a=control:track1 RTSPClientSession[0xd2720]::incomingRequestHandler1() read 191 bytes:SETUP rtsp://18.85.45.113:8554/videoStream/track1 RTSP/1.0 CSeq: 3 Transport: RTP/AVP;unicast;client_port=45844-45845 User-Agent: VLC media player (LIVE555 Streaming Media v2008.09.02) parseRTSPRequestString() returned cmdName "SETUP", urlPreSuffix "videoStream", urlSuffix "track1" Handling Command Setup Creating New Stream Source... Creating New RTP Sink Buffer Set... Creating New MPEG4ESVideoRTPSInk Created RTPSink... sending response: RTSP/1.0 200 OK CSeq: 3 Date: Thu, Jan 01 1970 21:40:38 GMT Transport: RTP/AVP;unicast;destination=18.85.45.34;source=18.85.45.113;client_port=45844-45845;server_port=6970-6971 Session: 1 RTSPClientSession[0xd2720]::incomingRequestHandler1() read 163 bytes:PLAY rtsp://18.85.45.113:8554/videoStream/ RTSP/1.0 CSeq: 4 Session: 1 Range: npt=0.000- User-Agent: VLC media player (LIVE555 Streaming Media v2008.09.02) parseRTSPRequestString() returned cmdName "PLAY", urlPreSuffix "videoStream", urlSuffix "" Handling command within Handle command play Doing required seeking Start Streaming Start Stream 0 startStream startPlaying MultiFramerRTPSink buildandsendpacket MultiFramerRTPSink packframe MultiFramerRTPSink getNextFrame FramedSource getnextframe FramedSource doinggetnextframe MPEG4DiscreteFramer doGetNextFrame FramedSource getnextframe FramedSource doinggetnextframe Segmentation fault Trace from VLC: [00000421] live555 demux error: RTSP PLAY failed Failed to read response: Success [00000424] main access error: connection failed: Connection refused [00000424] access_realrtsp access error: cannot connect to 18.85.45.113:8554 [00000420] main input error: open of `rtsp://18.85.45.113:8554/videoStream' failed: could not create access
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