conwin/videoserver

VideoServer.js

Usage

• First use npm to install the required modules listed in the package.json file

  • npm install

• Second use node to run the main server: RTSP.js

  • node RTSP.js

  • Ensure the folder resources inside the main application folder has the video files
    • So paths to the videos from the .js files will take the form ./resources/videoX.mjpeg
  • Server has been coded to throw and error and exit if the video files are not found

• Next run the client VideoPlayer.exe using a windows machine

  • Server IP address: 127.0.0.1 as denoted by the HOST variable in RTSP.js
  • Connect to Port: 3000 as denoted by the PORT variable in RTSP.js

• You're all set!

Package Information

RTSP.js

• The main application of the package
• Hosts a TCP server for clients to connect to
• Communicates back with client
• Parses clients data and messages to create client objects
• Parse client messages to direct operations based on if the client wishes to SETUP, PLAY, PAUSE, or TEARDOWN

Clients.js

• Client management data type
• At core holds array of client objects
• Public Functions:
  • addClient(address, port) adds a new client object
  • returnInitClient(address, port) returns the client object created on connection with the server
  • removeClient(id) removes the client in the array with the specified session id
  • getClient(id) returns the client object with the specified session id
• Client objects store:
  • File: path to file from RTSP.js location
  • Address: udp communication address
  • Port: initial joinging port
  • commPort: udp communication port
  • SessionID: session id generated by server
  • Socket: udp socket object for communication
  • Position: current position in client.File(for pause-play functionality)
  • Timer: timeoutId for the timer sending video packets
  • FileSize: size of client.File
  • Sequence: initial sequence number
  • Timestamp: initial timestamp
• Client object have methods:
  • reset(): resets all attributes to initial values
  • setTimer(timer): adds the timer object to client.Timer
  • stopTimer(): calls clearTimeout on client.Timer's timeoutId (for pause and teardown functionality)

RTP.js

• creates udp socket for client object
• Gets initial timestamp and sequence number
• Holds the streaming function utilized asynchronusly by client objects
• New video frame sent every 50 ms

RTPpacket.js

• Creates an RTP header
• Concatenates an RTP header buffer object with a video frame buffer object