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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 ?

• What are the video streaming specifics : video coded parameters, web server configuration, video player ?

  20 septembre 2011, par albanx

  With my server I encode videos from any format to mp4 with ffmpeg, for making play them with flowplayer on the web site. The problem is that videos buffering is not working. Video plays once it has been fully buffered (downloaded).

  • Should mp4 videos be encoded in any particular way for having
    streaming work ?
  • Or maybe the IIS7 server need extra configuration ?
  • I am using php for getting video files : getMedia ?file=asd.mp4

  I have IIS7 web server with php. Any suggestions ?