If nothing works, transcode the file to a friendlier format using HandBrake (nightly build).
One-liner for FFmpeg pros:
ffmpeg -i ssis835_4k.mkv -c:v libx265 -preset fast -crf 19 -pix_fmt yuv420p10le -r 30000/1001 -c:a copy ssis835_fixed.mkv
Some groups release .patch files (e.g., xdelta or .fix) that modify an existing 1080p file into a 4K version. To apply: ssis835 4k fix
This is huge. SSIS-835’s 4K master is often in BT.2020 HLG (Hybrid Log-Gamma), not standard PQ HDR10. If nothing works, transcode the file to a
Cause: GPU can’t decode HEVC 10-bit 4K@60fps.
Fix: One-liner for FFmpeg pros:
ffmpeg -i ssis835_4k
Sometimes the ssis835 file is in an MKV container with wrong header compression. Use MKVToolNix: