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• How to convert a 16:9 video to 4:3 video with top & bottom blurred video bars by using ffmpeg ?

  27 décembre 2018, par Wai Gyi

  I would like to convert a landscape video to a square video with blur bars at top and bottom.

  I tried to adapt the commands from the following link but not succeeded.

  FFmpeg : How to convert horizontal video 16:9 to vertical video 9:16, with blurred background on top and bottom sides

  So, can someone share a ffmpeg command with me ?

  Thank you very much for your help.

  Update : I tried again and get a working command. Please check and review.

      ffmpeg -i in.mp4 -lavfi "[0:v]scale=iw:iw*3/4,boxblur=luma_radius=min(h\,w)/40:luma_power=3:chroma_radius=min(cw\,ch)/40:chroma_power=1[bg];[bg][0:v]overlay=(W-w)/2:(H-h)/2,setsar=1,crop=h=iw*3/4" out.mp4

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

  21 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 ffmpeg several times 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 ?

• How to convert fisheye-video into an equirectangular video to use with 360°-video viewers ?

  11 juin 2017, par P. Dee

  Actioncams like GoPro put a wider fov into a standard 1920 x 1080 or higher resolution at the expense of distortion.

  How do I use ffmpeg to convert this fov-encoded format into an equirectangular video to use with 360°-video viewers ?