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• How can I loop one frame with ffmpeg ? All the other frames should point to the first with no changes, maybe like a recusion

  15 avril 2022, par zodrob

  I want to make a long video from a single image in ffmpeg.

  



  I need it to be fastly encodeable and at the end the video should have a small file size.

  



  Is it possible to fill the video with frames that point to the preivous(or the first) frame with no changes ?

  



  I tried with this code, but it was slow and made a big file :

  



  ffmpeg -loop 1 -i image.jpg -c:v libx264 -tune stillimage -shortest -preset ultrafast -t 3600 output.mp4


  


• Finding start point in audio file with ffmpeg

  4 juillet 2019, par jovadeza

  I’m trying to determine the starting and end point in an audio file with ffmpeg. My definition for start and end point is when the song reaches -27dB. I have tried multiple ffmpeg audio filters, but without the desired result.

  The closest I got was when using the following command :
  ffmpeg -i song.mp3 -af silencedetect=n=-27dB:d=0.2 -f null -

  However, this returns multiple values, since the song can get silent in the middle of the song as well.

  So, I only want to get the first time the song reaches -27dB and the last time the song reaches -27dB.

  ---

  See image with example markers, created manually in Adobe Audition. Marker 1 : song reaches -27dB for the first time, marker 2 : song reaches -27dB for the last time. This are the positions in the song I am trying to find, trough ffmpeg

  

  Thanks !

• Revision 110694 : Mise au point de la demo. Ca permet de se rendre compte que certains ...

  16 juin 2018, par eric@… — Log

  Mise au point de la demo.
  Ca permet de se rendre compte que certains YAML existant sont un peu permissifs (saisies input et email).