From personal use

  • half resolution: -vf scale=iw*.5:ih*.5
  • crop: -filter:v "crop=720:420:0:450"
  • start and end: -ss 5 -t 25
  • remove audio: -an

To explore


Note

My notes on Tools gather what I know or want to know. Consequently they are not and will never be complete references. For this, official manuals and online communities provide much better answers.