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• ffplay custom command to seek 5 instead of 10 seconds

  6 septembre 2018, par beta

  In ffplay the left/right arrows can be used to skip forward/back 10 seconds. Can I somehow create a custom shortcut (or replace the existing one) to skip only 5 or 3 seconds ?

• How can i insert 10 seconds of silent audio(null audio without images or video) into video repeat every 15 seconds with ffmpeg ?

  31 août 2018, par Adam Estel

  I have a clip video.mp4 . How can i insert 10 seconds of only silent audio into this clip repeat every 15 seconds until the end of this clip with ffmpeg ?
  I know anullsrc is an audio so i can’t use overlay filter. I research on google for a while but the only option i have is gte(mod(t,15),10)).

  Thank you.

• How to remove 6 seconds of both video and audio and repeat it after every 20 seconds with ffmpeg

  15 juillet 2018, par Adam Estel

  I tried to figure a way to to remove 6 seconds of both video and audio every 20 seconds.This is my code :

    ffmpeg -y -i "input.mp4" -vf "select='not(lt(mod(t,20),6))',setpts=N/FRAME_RATE/TB,setpts=PTS-STARTPTS" -af "aselect='not(lt(mod(t,20),6))',asetpts=N/SR/TB,asetpts=PTS-STARTPTS" -preset superfast out.mp4

  But it resulted not that I want,the wrong timings being selected.
  I don’t know what did i do wrong here ?
  Sorry for my bad english.Thank you