Quote:
Originally Posted by excellentswordfight
And main teir is 40000.
If the only concern is level compatibility then I usually just set --level in the command line and x265 will automatically set the vbv and limit max ref frames etc to be compliant. But afaik some decoders will not handle such big bufsize even though they specification says that it supports a specific level, so there is viability to set custom (lower) values to ensure playback on an targeted device. But all my hevc level 5.1 devices have had no playback issues with encodes using the values in high teir though.
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Lots of real-world devices support > main tier but not all of high tier. UHD Blu-ray supports 80 Mbps Level 5.1, for example. For typical long-GOP distribution encoding, the Main Tier limits are fine for transparent quality with most sources.