ffmpeg: add overlay to video

ffmpeg -- logo overlay

ffmpeg -i video.mp4 -vf \
  "movie=logo.png [overlay]; \
  [overlay] scale=250:-1 [a]; \
  [a] format=yuva420p,colorchannelmixer=aa=0.5 [b]; \
  [in] curves=preset=lighter [vid]; \
  [vid][b] overlay=50:50 [out]" \
  -pix_fmt yuv420p \
  output.mp4 \
  && terminal-notifier -message 'done'

ffmpeg concat

ffmpeg -i input1.mp4 -i input2.mp4 \
-filter_complex "[0:v:0] [0:a:0] [1:v:0] [1:a:0] concat=n=2:v=1:a=1 [v] [a]" \
-map "[v]" -map "[a]" output.mp4

ffmpeg cut

ffmpeg -ss 00:00:00 \
   -i video.mp4 \
   -t 00:00:21 \
   00.output.mp4

ffmpeg with eq

ffmpeg -i video.mp4 -vf \
  "movie=logo.png [overlay]; \
  [overlay] scale=250:-1 [a]; \
  [a] format=yuva420p,colorchannelmixer=aa=0.5 [b]; \
  [in] eq=1.2:0.1:1 [vid]; \
  [vid][b] overlay=50:50 [out]" \
  -pix_fmt yuv420p \
  output.mp4 \
  && terminal-notifier -message 'done'