Recherche avancée

Sur d’autres sites (14923)

• ffmpeg : process each image frame after capturing with x11grab

  21 juin 2012, par cache

  Programmatic way to process each image frame right after capturing using x11grab in ffmpeg

  For example, I have a program that captures screenshots from x display using command :

  ffmpeg -f x11grab -s cif -r 25 -i :0.0 /tmp/out.mpg

  '-r 25' means there are 25 frames being captured in a second. And my question is how to process each frame(image) and decide whether I want to keep this frame or drop it right after each image is captured. I guess this should be done in C by adding some code in x11grab.c.

• Image sequence to video stream ?

  22 août 2015, par Hauns TM

  Like many people already seem to have (there are several threads on this subject here) I am looking for ways to create video from a sequence of images.

  I want to implement my functionality in C# !

  Here is what I wan’t to do :

  /*Pseudo code*/
  
  void CreateVideo(List<image> imageSequence, long durationOfEachImageMs, string outputVideoFileName, string outputFormat)
  
  {
  
      // Info: imageSequence.Count will be > 30 000 images
  
      // Info: durationOfEachImageMs will be &lt; 300 ms
  
  
  
      if (outputFormat = "mpeg")
  
      {
  
      }
  
      else if (outputFormat = "avi")
  
      {      
  
      }
  
      else
  
      {
  
      }
  
  
  
      //Save video file do disk
  
  }
  
  </image>

  I know there’s a project called Splicer (http://splicer.codeplex.com/) but I can’t find suitable documentation or clear examples that I can follow (these are the examples that I found).

  The closest I want to do, which I find here on CodePlex is this :
  How can I create a video from a directory of images in C# ?

  I have also read a few threads about ffmpeg (for example this : C# and FFmpeg preferably without shell commands ? and this : convert image sequence using ffmpeg) but I find no one to help me with my problem and I don’t think ffmpeg-command-line-style is the best solution for me (because of the amount of images).

  I believe that I can use the Splicer-project in some way (?).

  In my case, it is about about > 30 000 images where each image should be displayed for about 200 ms (in the videostream that I want to create).

  (What the video is about ? Plants growing ...)

  Can anyone help me complete my function ?

• capturing video with static image on screen corner in android

  21 juin 2012, par Rahul Upadhyay

  I am trying to capture a video with Static Image on it, and then want to save that Video with the same image on Video, how to do that ?
  I read so many articles and i get to know that it will be done with the help of FFMPEG. But i don't know how to do that, can anybody please guide me through it.

  the screen will be look like this,