Notes

Emacs

General

• Find face at point C-u C-x =

Macro

• Kmacro-keymap default binding C-x C-k
• kmacro-set-counter is C-x C-k C-c

H264 encoding

• QP parameter Regulate how much of spatial data is kept Small = a lot of data is kept => good quality High = data is discarded => lower quality (but lower bitrate)
• VBR: variable bitrate Open loop bitrate encoding. Given raw video and QP parameter: yields a video of fairly constant quality, but bitrate may change a lot
• CBR: Constant bit rate Closed loop bitrate encoding. We target a given bitrate and adapt the encoder parameters (QP?) accordingly during the encoding like any system in control theory