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• Revision 33999 : on pose le cookie depuis javascript, ce qui est plus uniforme d’une part, ...

  28 décembre 2009, par fil@… — Log

  on pose le cookie depuis javascript, ce qui est plus uniforme d’une part, et nous rend compatible fastcache d’autre part

• ffmpeg - offset cropped part of a video

  23 mai 2020, par SomeWindowsUser

  Problem :

  



  

  • I have a video that is made of two separate Videos next to each other

  


  



  -------------------------
|   -------             |
|   |vid2 |             |
|   |     |    vid1     |
|   -------             |
|                       |
|                       |
|                       |
-------------------------


  



  

  • the 2nd video is delayed in respect to the first, that's why I want to offset the second video by the difference

  


  



  For the cropping part, I figured using the crop-option might work, but I don't quite know, how to put the video back together, so that the cropped part of the video ends up at the same place as before, i.e. how to set the position, while overlaying the 2 videos.

  


• Read part of every frame of a video file

  18 novembre 2012, par user1414470

  I'm doing some tracking on video files. First I separate frames using ffmpeg and the for each frame i apply a mask and then perform the tracking algorithm.

  To make this process faster I'm thinking about reading only the parts I need. like reading the part that I apply the mask or better than that reading boxes around the previous positions of objects. So I'm looking for a way to decode and read a specific part of a specific frame from a video file. Is there any way to do that ?