ffmpeg presets

[
  {
    "prname": "Video Trim",
    "prpatern": "-ss 00:00:20 -to 00:00:10 -c copy",
    "prext": "mp4"
  },
  {
    "prname": "Replace Audio",
    "prpatern": "-c:v copy -c:a aac -map 0:v:0 -map 1:a:0",
    "prext": "mp4"
  },
  {
    "prname": "CRT Lines",
    "prpatern": "-filter:v \"split[a][b];[a] curves=darker [a];[a][b] blend=all_expr='if(eq(0,mod(Y,3)),A,B)':shortest=1\"",
    "prext": "mp4"
  },
  {
    "prname": "Change Speed",
    "prpatern": "-filter:v 'setpts=1.25*PTS'",
    "prext": "mp4"
  },
  {
    "prname": ".webm",
    "prpatern": "-c:v libvpx-vp9 -crf 30 -b:v 0 -b:a 128k -c:a libopus",
    "prext": "webm"
  }
]