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• How to set background to subtitle in ffmpeg ?

  13 décembre 2020, par supermario

  It is described here how ot burn a srt file into a video. 
However, I want to put a semi-transparent background to the subtitles so that the texts can be read more easily. How can I do that ?

  


• Using ffmpeg to increase framerate without changing duration [closed]

  11 février 2024, par sarunw

  I want to increase the video frame rate with FFmpeg.

  


  I found from this website, https://trac.ffmpeg.org/wiki/ChangingFrameRate, that I can use -r or fps filter.

  


  The doc said the output duration of the video would stay the same, but that is not the case in my test.

  


  What I tried so far.

  


  I got a video with a duration of 19 seconds at 1.45 fps (I took this number from the QuickTime app)

  


  After using these commands, fps become 30, but the duration becomes 1 second.

  


  ffmpeg -i <input /> -filter:v fps=fps=30 <output>&#xA;ffmpeg -i <input /> -filter:v fps=30 <output>&#xA;ffmpeg -y -r 30 -i <input /> <output>&#xA;</output></output></output>

  


  Here is the file https://www.dropbox.com/scl/fi/nl6yabgl9yzikx12mkvnu/sample2.mp4?rlkey=wk4fsu2vvkcui31cneq8vruik&e=1&dl=0

  


• ffmpeg looping short videos inside collage of video

  16 avril 2018, par Yogesh Kale

  See reference link :-
  https://trac.ffmpeg.org/wiki/Create%20a%20mosaic%20out%20of%20several%20input%20videos
  i am making video collage using ffmpeg. i am able to make a collage of videos.So my question is : looping short videos inside collage of video.
  currently short video gets finished and remains as it is till large length video ends.i want looping short video till large video ends
  i am using overlay of ffmpeg for making collage