Quote:
Originally Posted by apophis906
All I can say is that when left to auto the bitrate will go up to what it needs to for the set crf. Even if that bitrate is past what the auto set level is and what its vbv maxrate would be.
A 5 min clip I muxed and ran through bdinfo. This was set to auto and came out as level 5 main.
Code:
VIDEO:
Codec Bitrate Description
----- ------- -----------
MPEG-H HEVC Video 37701 kbps 2160p / 23.976 fps / 16:9 / Main 10 @ Level 5 @ Main / 10 bits / HDR10 / BT.2020
FILES:
Name Time In Length Size Total Bitrate
---- ------- ------ ---- -------------
00000.M2TS 0:00:00.000 0:04:59.757 1,620,111,360 39,405
CHAPTERS:
Number Time In Length Avg Video Rate Max 1-Sec Rate Max 1-Sec Time Max 5-Sec Rate Max 5-Sec Time Max 10Sec Rate Max 10Sec Time Avg Frame Size Max Frame Size Max Frame Time
------ ------- ------ -------------- -------------- -------------- -------------- -------------- -------------- -------------- -------------- -------------- --------------
1 0:00:00.000 0:04:59.757 41,368 kbps 77,747 kbps 00:01:56.741 72,488 kbps 00:01:56.741 69,931 kbps 00:01:56.825 0 bytes 1,024,557 bytes 00:03:20.950
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Yes this is my experience as well, and its also stated in the docs that vbv is disabled by default so when using crf mode its uncapped when level is set automatically. This is also why I always set level manually so that I dont get any weird spikes that can cause buffer issues for LAN streaming, SoC mediaplayers etc. 4.1 High for HD and 3.1 for SD usually is high enough either way to cause much impact on quality, were using the lowest possible for that MaxDpbSize can.