Recherche avancée

Sur d’autres sites (9058)

• Revision 47795 : On récupère le degré de rotation (pour les videos d’iphone par exemple) ...

  14 mai 2011, par kent1@… — Log

  On récupère le degré de rotation (pour les videos d’iphone par exemple) que l’on met en base ... et on l’utilise pour tourner les encodages ...
  ffmpeg2theora ne peut tourner les videos donc dans ces cas là on force l’usage de ffmpeg

• Concat three videos with one audio [duplicate]

  26 septembre 2018, par Михаил Безуглый

  This question already has an answer here :

  • FFmpeg concatenation, no Audio in Final Output
    
    1 answer
    
  • FFmpeg : concat multiple videos, some with audio, some without
    
    1 answer
    
  • Vertically or horizontally stack several videos using ffmpeg ?
    
    2 answers
    

  Thank you for coming here.
  I have three video clips (the first is 3 seconds, the second is 20 seconds, the third is 2 seconds), I connect them using the following command :

  ffmpeg -i opening.mp4 -i middle.mp4 -i ending.mp4 -filter_complex "[0:v] [1:v] [2:v] concat=n=3:v=1 [v]" -map "[v]" output.mp4

  Since all three videos do not have audio tracks, I do not need to include [a]. And then the day came when I needed it. I have an audio track,
  duration of 35 seconds(which is much larger than the output.mp4 video) and I need this audio to be connected to the whole video.
  1) Do I need to crop the video to the length that is obtained by merging all three videos ?
  2) Is it possible to do this with one command, or i need first have to concatetate all together with my command, and then merge video and audio track ?

• How do I use ffmpeg to bulk scale videos of different sizes to the same size (some potentially with black bar padding) ?

  9 décembre 2020, par Tumbleweed53

  I have a bunch of videos I want to stitch together. I want to scale them all to the same size, maintaining aspect ratio (thus adding black bar padding if necessary). Some videos will be downscaled, but most upscaled.

  


  Does anyone have a clever ffmpeg scale formula to accomplish this ? My alternative is to iterate through every video and calculate the scale formula based on its size, but I'd prefer not to do that if I don't have to.