How to get image data from VSE in python

Hello,

I’d like to make some plugins to add some effects to Blender VSE. I was wondering if I could make a C/C++ addon but I can’t find nothing newer than 2008. (Of course creating it into blender is not so difficult, but it must be accepted and if I want to share my addons everyone must re-compile blender.

So the idea is to make them in python and these plugin will be much more portable.

I’ve found:
bpy.app.handlers.frame_change_pre.append(frameChange_func)
bpy.app.handlers.render_pre.append(preRender_func)
bpy.app.handlers.render_post.append(postRender_func)

and then, I can get the strips involved in the current frame but I don’t know how to get the image data until the current frame, it must be the mixed image data of all strips until the current one. I would like to change this data to create new frames.

Any ideas?

Thank you very much