[x265] Bitrate calculation is off by 5:1 for FullHD video

[Mario *LigH* Rohkrämer]

Just the last 2 examples of encoding 60 seconds from ToS in 1080p:

a) CRF 24 => 11402140 B * 8 b/B : 60 s = 1520.3 kbps (x265 reports 7597.54  
in CSV)
b) CRF 18 => 26700793 B * 8 b/B : 60 s = 3560.1 kbps (x265 reports  
17796.64 in CSV)

It seems that x265 reports about 5x the bitrate of the result, but only  
for this large video dimension.

Another test with a small video dimension (640x272) hits the bitrate  
rather correctly:

c) fast: 709078 B * 8 b/B : 52.208 s = 108.6 kbps (x265 reports 107.87 in  
CSV)
d) ultrafast: 5325541 B * 8 b/B : 52.208 s = 816.0 kbps (x265 reports  
815.27 in CSV)

CSV logs are available on request.

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Fun and success!
Mario *LigH* Rohkrämer
mailto:contact at ligh.de