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• Python threading module on windows after session logout

  1er décembre 2013, par e271p314

  I wrote a code which starts to record screen capture from the second it identifies mouse movement until it identifies the mouse didn't move for a predefined time (10 seconds).
  In python, on windows, how to wait until mouse moves ?
  If, I'm logged in to the session the code works fine, i.e. it starts and stops on time and records the screen capture. But, if I logout, I expect the script to identify that the mouse doesn't move and stop recording. Instead, the code doesn't stop and when I login again (long after the 10 seconds passed), the screen capture (from the previous session) keeps running, yelling the rt buffer is full and it keeps running until I close the cmd console even I expect it to work for 10 seconds (at least when I'm logged in). Any idea what is the issue ? I feel like it is something between the threading module and the session logout but I could be completely wrong about this.

• Create GIF from MP4 with PHP

  6 janvier 2016, par senty

  I first started with installing FFMpeg and ImageMagick on my local server (while ssh'd).

  I made some research, and thought that I can achieve Mp4->GIF with first, converting mp4 -> png and then, png -> gif.

  So I tried running
  ffmpeg -i input.mp4 -r 10 man/output%05d.png. It created PNGs from Mp4 successfully. Then I tried running this php on localserver..

  $ php convertDoc.php

  $animatedGif = new Imagick();
  
  
  
  $path = "./man/";
  
  
  
  $files = scandir($path);
  
  
  
  for($i=2;$i<6;$i++) {
  
      $image = new Imagick();
  
      var_dump($files);
  
      $image->readImage($path.$files[$i]);
  
  
  
      $animatedGif->addImage($image);
  
  }
  
  
  
  $animatedGif->writeImages('testOutput.gif', true);

  But I started getting error :

  PHP Fatal error : Uncaught exception ’ImagickException’ with message ’no decode delegate for this image format

  ---

  I checked convert -list configure. I have DELEGATES bzlib mpeg fontconfig freetype jbig jng jpeg lzma png ps tiff wmf x xml zlib

  Also I checked identify -list format. I have PNG* rw- Portable Network Graphics (libpng 1.2.50) AND GIF* rw+ CompuServe graphics interchange format

  ---

  What am I doing wrong ? Am I on the right way or completely out of track ?

  What is the most optimal way of generating GIFs from MP4 in PHP either using FFMpeg or Imagick, or both ?

• ffmpeg4.4 missing in OpenCV3.4.13 + Android Studio4.2.1 ? No tutorial gives answer how to fix

  8 juin 2021, par Fab

  Finally opencv is working in my Android Studio project (solved with help of https://www.youtube.com/watch?v=-0Yx1UzozzQ). But theres is no Video I/O information visible so I guess i didnt connected ffmpeg correctly in my project and it isnt used at all !?

  


  My steps so far :

  


  


  • ffmpeg download : https://www.videohelp.com/software/ffmpeg

    


  


  • added ffmpeg to path like explained here :
https://soundartifacts.com/how-to/186-how-to-install-ffmpeg-on-windows-10-amp-add-ffmpeg-to-windows-path.html#video
powershell shows installation.

    


  


  • when printing Core.getBuildInformation() in the project I see that the Video I/O section is empty and I assume there has to be some information about FFMPEG etc...see picture :
enter image description here

    


  


  


  

  • I dont get any error messages. I try to VideoCapture.open("somestring") and returned is just false.

  


  


  I know there are a lot of similar questions but I cant identify which one really addresses my issue.
Really appreciate your help. Thanks, Fabian