Resize & keep Ratio: -vf “scale=1920:-2”
Double Size: -vf “scale=2*in_w:2*in_h”
Convert To Images Sequence: -r 25/1 (Output Filename=%a_%04d.png)
add Tag : -vf drawtext=“fontfile=/Windows/Fonts/ariblk.ttf:text={TEXT}: fontcolor=gray: fontsize=48: x=(w-text_w-60): y=(h-text_h-60)” -codec:v dnxhd -b:v 185M -codec:a copy
remove identical pictures in video : -vf “select='if(eq(n,0),1,gte(scene,0.00001))',setpts=N/FRAME_RATE/TB”
convert first frame video to a png file -ss 0 -vframes 1 -q:v 1