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Old 4th January 2019, 20:18   #6598  |  Link
benwaggoner
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Join Date: Jan 2006
Location: Portland, OR
Posts: 4,750
Quote:
Originally Posted by benwaggoner View Post
Really? it seems it should be --aq-mode 4, then, if it is exclusive to the others.
Well, just did a test encode and it appears to be true

x265 [warning]: hevc-aq enabled, disabling other aq-modes

This is confusing syntax. We really should have aq-mode 4 and 5. aq-mode 4 would be HEVC-AQ, and 5 would be HEVC-AQ with low luma bias (like aq-mode 3 versus 2). The need for low-luma bias is content dependent, and we shouldn't be locked into one or another.

Also I am getting VBV violations multiple times a second. From the first two seconds of my test clip:

x265 [warning]: poc:0, VBV underflow (-2596808 bits)
x265 [warning]: poc:8, VBV underflow (-13025705 bits):06:32
x265 [warning]: poc:4, VBV underflow (-13047849 bits):38:49
x265 [warning]: poc:16, VBV underflow (-12824903 bits)11:58
x265 [warning]: poc:12, VBV underflow (-12960465 bits):23:11
x265 [warning]: poc:24, VBV underflow (-12939991 bits)27:49
x265 [warning]: poc:20, VBV underflow (-13441281 bits):34:43
x265 [warning]: poc:32, VBV underflow (-12651471 bits)23:47
x265 [warning]: poc:28, VBV underflow (-12985385 bits):28:15
x265 [warning]: poc:40, VBV underflow (-12559455 bits)20:36
x265 [warning]: poc:36, VBV underflow (-13122593 bits)24:13


Was the Experimental Feature tag left off for HEVC-AQ? I love the idea of improved AQ, but it would be good to have a clear indication in the help text about how close to production ready this feature is.
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Ben Waggoner
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