Question / Help QuickSync maximum bitrate for still images?

[WongKit]

Hi,

I just need some references here. Is it normal, that QuickSync stays nearly all the time at the maximum specified bitrate while streaming/recording - even for still images?

My scenario:
QuickSync enabled
Maximum bitrate: 18000 kbps
CBR: disabled
Gamecapture (any game)

When I use the x264 implementation, my bitrate can drop to about 300 kbps when there is a non-moving scene at my game capture. With QuickSync, the same scene stays at about 17000 kbps,

Regards
WongKit

 

[Sapiens]

Yes, this is normal behavior as Quick Sync doesn't do VBR. x264 would do the same if you set it to CBR mode instead of VBR.

 

[WongKit]

Are you sure, that QuickSync is CBR? When I switch from Game Capture to Monitor Capture (e.g. Desktop), the bitrate drops too.