[Sven Van roosenbroek]

I also get the following error:

An error occurred while creating the media file myvideo.mp4
The reason for the error could not be determined

I have an I7 3770K as CPU and an AMD sapphire 7970 card.

I’ve tried the following GPU Drivers:
AMD 12.3 WHQL
AMD 12.6 WHQL
AMD 12.7 BETA

OpenCL 1.2, Tahiti compute units:32@1050MHz
OpenCL 1.2 AMD-APP (938.1) FULL_PROFILE

and when I click the OpenCL button in the Mainconcept template it checks out ok: OpenCL available.