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guahai
Joined: 09 Nov 2009
Posts: 4
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 Posted: Mon Jan 18, 2010 4:03 pm Post subject: Question: Videostreaming over network |
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Hi, i have written a simple application which loads on machine 1 a mpeg video file and it should be displayed on machine 2 (called display, which is in the same network as machine 1 in the CG chair), where serverregistry is runnning. Needed Nodes are all available.
This is the crucial part which is within a try and catch construct (similar to hellonmm examples):
| Code: |
NodeDescription reader("GenericReadNode"); //0
NodeDescription demuxer("MPEGDemuxNode"); //1
NodeDescription videodecoder("MPEGVideoDecodeNode");//3
NodeDescription videoplayer("XDisplayNode"); //4
NodeDescription audiodecoder("MPEGAudioDecodeNode"); //5
NodeDescription audioplayer("ALSAPlaybackNode");//6
videoplayer.setLocation("display");
graph.addEdge(reader, demuxer);
graph.addEdge(demuxer, "mpeg_video0", videodecoder);
graph.addEdge(demuxer, "mpeg_audio0", audiodecoder);
graph.addEdge(videodecoder, videoplayer);
graph.addEdge(audiodecoder, audioplayer);
cerr << "request GraphDescription from registry" << endl;
ClientRegistry& registry = app->getRegistry();
registry.requestGraph(graph);
INode* readfile = graph.getINode(reader);
IFileHandler_var read_filehandler
(readfile->getParentObject()->getCheckedInterface<IFileHandler>());
read_filehandler->setFilename(input_file);
// realize and start graph
cerr << "realizeGraph()" << endl;
graph.realizeGraph();
cerr << "startGraph()" << endl;
graph.startGraph();
// wait ...
cerr << "Playing video ... enter 'q <enter>' to exit." << endl;
string s;
cin >> s;
// stop and release graph
cerr << "stopGraph()" << endl;
graph.stopGraph();
cerr << "releaseGraph()" << endl;
registry.releaseGraph(graph);
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The videofile is being played back but after some while. Before the playback i get the following Error messages:
| Code: |
NMM ERROR 2: > SockConnector> Connection failed
NMM ERROR 2: > TCPStrategy> Network error during connection setup
NMM ERROR 2: > TCPStrategy> Exception: ConnectionException >Connection refused at server.
NMM ERROR 0: Proxy> Exception during sendConnectToObject: Exception : BindingException : Exception: ConnectionException >Connection refused at server.
NMM ERROR 0: ClientRegistry> Exception : BindingException : Exception: ConnectionException >Connection refused at server.
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then it tries to request the nodes GenericReadNode, MPEGDemuxNode, MPEGVideoDecodeNode, MPEGAudioDecodeNode, XDisplayNode and the ALSAPlaybackNode but when it tries to request XDisplayNode it throws the following error:
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Must request XDisplayNode
Try to request Node from Host
134.96.249.94
NMM ERROR 0: > List> Invalid type assignment
NMM ERROR 0: > List> Current type : list_ObjectID Expected type: list_nmm_int64
NMM ERROR 0: > List> Current namespace : std Expected namespace: std
Invalid Magic Number 78
NMM ERROR 2: > TCPStrategy> Serialization error while receiving event reply
NMM ERROR 2: > TCPStrategy> Exception: Invalid Magic number
NMM ERROR 2: > TCPStrategy> Event: IRegistry::initRequest
NMM ERROR 2: > TCPStrategy> Connection closed while waiting for reply!
NMM ERROR 0: ClientRegistry> Exception : BindingException : Connection closed
NMM ERROR 2: > TCPStrategy> Connection closed while waiting for reply!
NMM WARNING 2: Dispatcher> Unhandled exception in listener for event IObjectAcceptor::connectToObject
NMM WARNING 2: Dispatcher> Exception : BindingException : Connection closed
NMM ERROR 2: > TCPStrategy> Sending request after connection was closed
NMM ERROR 0: ClientRegistry> Error Requesting session from 134.96.249.236:22801
NMM ERROR 0: ClientRegistry> Exception : RegistryException : Exception : BindingException : Connection closed
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After a while, the nodes are requested again and then no error is thrown anymore and the video is played back on machine 2.
The serverregistry on machine 2 throws the following errors before the playback of the file:
| Code: |
./serverregistry -v
ServerRegistry successfully started!
NMM ERROR 2: > EmptyErrorHandler> Exception : RegistryException : A maximum timout occurs in the Registry. The access control is enabled by another process
NMM ERROR 2: > EmptyErrorHandler> Context:
NMM ERROR 2: > EmptyErrorHandler> OutOfBandBindingErrorContext
NMM ERROR 0: ServerRegistry> sshar: Init a new Session
NMM ERROR 2: > Distributed event listeners may only be removed through a TransportStrategy
NMM ERROR 2: > Distributed event listeners may only be registered through a TransportStrategy
NMM ERROR 0: ValueFactory> No type ISourceFileHandler in namespace NMM available
NMM ERROR 0: ValueFactory> No type ISeekable in namespace NMM available
NMM ERROR 0: ValueFactory> No type IMPEGDemux in namespace NMM available
NMM ERROR 0: ValueFactory> No type IALSADevice in namespace NMM available
NMM ERROR 0: ValueFactory> No type IAudioDevice in namespace NMM available
NMM ERROR 0: ValueFactory> No type IVolumeControl in namespace NMM available
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What does these errors mean? What am i missing in my code? |
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guahai
Joined: 09 Nov 2009
Posts: 4
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| Posted: Mon Jan 18, 2010 10:40 pm Post subject: |
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ok, i solved the problem after testing and modifying.
i missed the right headers and libs from NMM. Clic was working without any problems, so i added all the headers and libs that were used by clic.
sorry, if there was some confusion...  |
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