DF4910HD-DN | DDF4910HDV-DN-IM/-SM
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The RTSP tab is used to congure the RTSP server in the camera.
Fig. 9-5
The standard port number for RTSP is 554.
In the RTSP server port input eld the port number can be changed as needed.
In order to generally prevent access to the RTSP server in the camera, which means not
to allow any RTSP transmission, the relevant checkbox can be deactivated.
RTP over RTSP buffer
Note that the following paragraph only applies to RTP via RTSP/TCP.
If the network is busy or if a switch within the network, respectively the receiver/client, no
longer accepts additional data, the camera can no longer send further image data. The
result is a so-called data backlog in the camera.
In order to prevent a loss of images, the yet-unsent image data can – at least for a short
time – be saved in an internal RTSP buffer (default capacity 1024 kBytes).
Only in case of a buffer overload are all saved images lost.
Permanent network overload results in a delay in displaying the images at the client. The
delay is proportional to the set size of the buffer (amount of images saved).
A large RTSP buffer is only recommended in case of short-term network overloads.
In case of a permanent network overload a smaller buffer as well as lower bit rates are
recommended for the individual encoder settings.
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