15.04.2020, 15:34
Quote:great, thank you , so useful! but when to use Average bitrate mode to encode?
Constant rate is the only mode that you need to use. It just adjusts variable bitrate according to selected quality. Note that quality scale is very non linear. Quality within 20-19 will provide ok compression and small file sizes. 18-14 is near Blu Ray like quality i guess. Quality 10-2 is ok as intermediate or editing format. In addition min and max bitrate is limited by selected Profile Level.
Also you can limit Buffer size and Max fillrate in "Rate control" tab. For legacy devices and and Blu Ray players compatibility it is recommended to set Buffer size 30000 and Max fillrate 40000 (--vbv-maxrate 40000 --vbv-bufsize 30000)