#129119 – ffmpeg: Support H.265 video output codec – blender

Now can pick “H.265 / HEVC” in the video codec dropdown.

Question: should video “presets” get H.265 entry? This PR does not (AV1 does not get presets for it either).

Implementation notes:

• Remap CRF value (which is for H.264) slightly to better match H.265 CRF range (e.g. default Medium 23 -> 28).
• Set lossless mode via appropriate private param, and use 4:4:4 YUV format just like for some other video codecs when in lossless.

Now can pick “H.265 / HEVC” in the video codec dropdown.

Question: should video “presets” get H.265 entry? This PR does not (AV1 does not get presets for it either).

Implementation notes:
– Remap CRF value (which is for H.264) slightly to better match H.265 CRF range (e.g. default Medium 23 -> 28).
– Set lossless mode via appropriate private param, and use 4:4:4 YUV format just like for some other video codecs when in lossless.