JVC 257 Security Camera User Manual


 
- Set unique Multicast address and port number to each Multicast stream if multiple multicast streams are required
in the system.
- Reload of ActiveX control is required to change Multicast property.
35. PSIA
- PSIA Account
Default User Name: psia
Default Password: jvc
- RTSP URI
See Chapter 4.
36. FAQ
(1) Low Frame rate due to long delay of network
- Causes of Low Frame Rate
During transmission via TCP, the camera sends out the following data by receiving the Ack of TCP. When network
delay is long, reception of Ack will be delayed and sending rate will drop. This therefore leads to a drop in the
frame rate.
- Countermeasure
This problem can be avoided by receiving via multicast. Multicast uses UDP and Ack does not exist. As such, the
sender will be able to continue sending without being affected by network delays.