multimedia/jellyfin-ffmpeg: opencl needed for Jellyfin's HDR tone mapping
Jellyfin does AMD VAAPI HDR tone mapping with libplacebo, not OpenCL. However,
EncodingHelper.GetVaapiVidFilterChain() has an early-exit guard before it ever
selects the AMD branch
It need 2 patches:
- OpenCL (Jellyfin's IsOpenclFullSupported gate)
- overlay_vulkan framesync patch (Jellyfin's IsVulkanFullSupported gate)
PR: 298857
Approved by: Michael Johnson <michaeljohnson@ahze.net> (maintainer)