Example of streamer with recording of published video stream
This streamer can be used to publish and record the following types of streams on Web Call Server
On the screenshot below streaming from the client has been stopped.
While publishing, video from the camera is played in 'My Video'.
When streaming is stopped, recording of the video stream becomes available for downloading and playback in the player on the right side of the page.
Code of the example
The path to the source code of the example on WCS server is:
recording.css - file with styles
recording.html - page of the streamer
recording.js - script providing functionality for the streamer
This example can be tested using the following address:
Here host is the address of the WCS server.
Work with code of the streamer
To analyze the code, let's take the version of file recording.js with hash cf0daabc6b86e21d5a2f9e4605366c8b7f0d27eb, which is available here and can be downloaded with corresponding build 0.3.18.1894.
1. Initialization of the API
2. Connection to server.
3. Receiving the event confirming successful connection
ConnectionStatusEvent ESTABLISHED code
4. Video streaming.
session.createStream(), publish() code
When stream is created, the following parameters are passed
- streamName - name of the stream
- localVideo - <div> element, in which video from camera will be displayed
- true for parameter 'record' - to enable stream recording
5. Receiving the event confirming successful streaming
StreamStatusEvent PUBLISHING code
6. Streaming stop
7. Receiving the event confirming successful streaming stop
StreamStatusEvent UNPUBLISHED code
On receiving the event, showDownloadLink() function is called to form the record file download link. The record file name returned by stream.getRecordInfo() method passed to the showDownloadLink() function.
8. Download link.
Stream recordings are saved to directory WCS_HOME/client/records.
When the link is formed:
- window.location.protocol is the protocol being used (HTTP or HTTPS)
- window.location.host is <address of the WCS server>:<port>
- name is name of the file with the recording