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ffmpeg - Encoding - h265

H.265/HEVC Video Encoding.

The libx265 encoder offers around 25–50% bitrate savings compared to H.264 video encoded with libx264, while retaining the same visual quality.

These gains will be most pronounced at resolutions of 1080p and higher.

Encode video as h265:x265 HEVC 10bit

Constant Rate Factor (CRF)

Two-Pass Encoding

References

https://trac.ffmpeg.org/wiki/Encode/H.265

https://x265.readthedocs.io/en/stable/