is there any possibility to use in/out range for export and several marker to export several clips automatically? I mean, if I want to export several clips, which are marked by markers, I must manually set in and out range in export. Is there any automation, so I can say: "set in and out range for marker 1 and 2 and export the clip"?
There isn't any of the shelf, but I have built scripting based tools that use this approach. You can find out more about the scripting API in other posts here.