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

  1er septembre 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.

• FFMEPG：Why does the video sound become smaller when I use pictures and wavs to compose a video, and there is less audio at the beginning of the video ?

  13 novembre 2022, par Naldo hwang

  ffmpeg.exe -r 10 -loop 1 -i 5197.jpg -i audio5197.wav -c:v libx264 -x264-params keyint=1:scenecut=0 -c:a aac -b:a 32k -pix_fmt yuvj420p -shortest out.mp4

  


  I'm trying to make a video with a picture and 7 hours of wav,There is always a few seconds less audio at the beginning of the video, and the sound becomes smaller.

  


  Thanks for reading and help.

  


• Ffmpeg : Output a video made of several video chunks of the input video

  20 mai 2013, par mad

  I was wondering if it was possible to output a video made of several extracts of the input video.
  For example outputting a video made of the first 10s of each minute of the input.

  I know you can do it programmatically, calling several time ffmpeg with -ss and -t to make the chunks and then merge them, but is it possible to do it in one command using video filters ?

  Thanks !