I wrote a python script to capture sequences of pics in SharpCap v2.9. Link to finished script got lost in a thread while developing it, so here is new thread to finished CaptureSequence v1.1 script.
Go here and click on "Download Zip", extract script, and then in SharpCap click on Scripting->RunScript and select script. You will see a window pop up with three options.
The first selection captures non-stacked PNG pics at regular intervals in seconds and saves to EarthSequence folder. This is great for collecting pics to make a cloud movie using free VirtualDub program.
The second selection captures stacked PNG pics at regular intervals in seconds and saves to CometSequence folder. This is great for collecting pics to make a comet movie using free VirtualDub program. User must manually start stacking first. Ignore the saved path name in green line as pics are saved in CometSequence folder.
The third selection captures DSOs in progressively longer stacked FIT32 pics in normal SharpCap folder. This is good for taking periodic progressively longer pics while stacking. You can do other things instead of watching screen. User must manually start stacking first.
It has some quirks, such as never reduce SharpCap window and Capture script window at same time or you'll have to kill it with Task Manager. Sometimes you have to click "Stop" more than once, but status above tells you if it is running or idle. Only way to exit script is to exit SharpCap.