Joe wrote:

thanks for your helpful answer and the explanations.
Following up on your comment on http://videocapture.sourceforge.net/
I found that there is jaraco.video, which seems to be
"a port of the VideoCapture module in pure Python using ctypes and comtypes."
(https://github.com/jaraco/jaraco.video)

It is using a 'DirectShow.tlb' file, whatever that is, to get the
definitions into comtypes.

A TLB file is a "type library".  It is a compiled version of the IDL for a set of COM interfaces.  IDL is modified subset of C++ that is used to declare the functions within a COM interface, their parameters, and their types.  It is intended to be  a language-independent way to define the functions within an interface.

Looks like you're on your way.

--
Tim Roberts, t...@probo.com
Providenza & Boekelheide, Inc.

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