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Note: Transcoding playback data is not supported!
Audio
(supported from VDG Sense version 2.7.3. and higher)
The RTSP plugin is capable of sending audio with the requested video in the following formats:
ulaw/mlaw
G.711
G.722
G.726
GmsAmr
PCM
By default, audio is not send along with the video. To request audio, add the ‘audio’ parameter to the RTSP request, for example:
rtsp://172.21.240.91/17167089910108338829?device=19&audio=1
NOTE: Audio will not work if the transcode option is used
Authentication
After initiating an RTSP stream, the server will require a username and password. These are identical to those set within the Sense Plugin Manager, please note that the Sense user needs to have sufficient permission for the camera which is requested. Both the username and password are case-sensitive. Figure 3 illustrate the login procedure within VLC media player.
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Figure 3: Logging in on the RTSP server.
Dual StreamingDualStreaming
By providing a width URI URL parameter, it’s possible to make use of the dual streaming capabilities of a device.
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Transcode stream url:
rtsp://<address>/<server-id>?device=<device-id>&width=320&height=240&transcode=1
The width, height and transcode parameters are send to the server, the server determines the correct stream, based on the dual stream setting for the max panel width. The stream is transcoded to a JPEG stream with the requested width and height, but it keeps the original aspect-ratio.Transcoding over limited bandwidth url:
rtsp://<address>/<server-id>?device=<device-id>&width=320&height=240&transcode=1&bandwidth=32
The stream is transcoded to half the requested width and height, balanced over the limited bandwidth, and keeps the original aspect-ratio.
The resulting frame-rate will differ and be irregular compared to the original frame-rate, due to the load-balancing.
Changelog
2.7.3 Audio support added