Jumpy Video During PTZ Panning

Do you have a short video clip of this to share with us? When dealing with video issues, seeing the symptoms helps a lot.

One simple thing to check - have those PTZs been configured for constant bit rate? That's one thing that would cause an immediate problem when you move a PTZ because that action creates a spike in bandwidth needed that might result in dropping frames.

I don't think latency is causing frames to drop but, again, seeing the video would really help (even a 5 second clip).

I had the same issues with the Q6035 when it first came out. It's been largely addressed with updated firmware, but (at least for 1080p) the main issue is the extra load on the H.264 encoder when panning (lots of motion to deal with). In addition to the suggestions above, try increasing the compression - this has the effect of reducing detail and reduces the processor loading. It also gets noticeably worse with additional streams being requested...

All other things being equal, would 60 fps will place a greater load upon the encoder and result in even less satisfactory performance?

If the reason for the stutter is camera loading during h.264 encoding at 30 fps, then is your rationale that a camera designed to support 60 fps will have been provisioned with greater processing capacity to deal with the higher encoding load, and that you would then run it at 30 fps to create some overhead?

I disagree with using constant bit rate, I would use constant frame rate (if available).

I disagree with using TCP instead of UDP, I would use UDP. This gives less overheads on the network and doesent require a packet retranmission.

Also check PC CPU usage for the PC displaying the camera is not high. if you find the problem is not as servere when using a lower bit rate then it may be CPU related, or display using mjpeg instead of h264 which requires more CPU grunt.

Also try another Ethernet switch.