PTZ Controls Have High Latency
In video surveillance, there are many codecs to choose from for compressing you video data. Commonly, h.264 is applied because it allows for the greater quality and smallest load in the network. By nature of design, h.264 only transmits the delta of pixel differences between frames. So in an image where a ball in thrown and the background is the same, only the pixels where the ball is will be affected from one from to the next. The remainder of the background will not be transmitted and therefore reduce the amount of packets traveling across the video network.
If you compare the real time lag between actual events versus live video display through VMS (video management server) client, you will notice some delay between them. If you are using H264, this delay is more significant than MJPEG for many of the cameras. The advantage of H264 is better compression, which means less bandwidth and storage usage. For better PTZ response time, if you experience sluggish PTZ response, you may want considering using MJPEG instead of H264 codec for video encoding.
For best PTZ response time, it is recommended to set all you PTZ cameras to MJPEG on your cameras through your VMS.