Fusion doesn't save renders as a video

Dear Community,
I recently started using fusion 8 on Linux, but I can't get the render to save as a video file, it saves the frames one by one as image files. In the saver node I tried to select a different format for the saver, but the thing still doesn't work.
I also get these two error messages in the console, But i don't know if they have anything to do with my problem.
OpenCL clGetPlatformIDs failed: CL_PLATFORM_NOT_FOUND_KHR
OpenCL Could not find valid context: CL_DEVICE_NOT_FOUND
Thank you in advance,
ToniMahoni101
I recently started using fusion 8 on Linux, but I can't get the render to save as a video file, it saves the frames one by one as image files. In the saver node I tried to select a different format for the saver, but the thing still doesn't work.
I also get these two error messages in the console, But i don't know if they have anything to do with my problem.
OpenCL clGetPlatformIDs failed: CL_PLATFORM_NOT_FOUND_KHR
OpenCL Could not find valid context: CL_DEVICE_NOT_FOUND
Thank you in advance,
ToniMahoni101