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• FFMPEG thumbnail in php application's is not rotated properly

  4 septembre 2015, par Vignesh

  I have created a FFMPEG thumbnail in a php application and tried to rotate the thumbnail image if the video is bottom up(reversed).But the image rotate is not working properly.
  The below is the code for image rotation

  $video = $storeHere.$mediaFile;
  
                                  $tImage = $upload_output['uploaded_file'].'.jpg';
  
                                  $thumbnail = $storeHere.$tImage;
  
                                  // shell command [highly simplified, please don't run it plain on your script!]
  
                                   shell_exec("ffmpeg -i $video -deinterlace -an -ss 1 -t 00:00:01 -r 1 -y -vcodec mjpeg -f mjpeg -s 250x250  $thumbnail 2>&1");
  
                                   /* image rotate fix */
  
                                      $source = imagecreatefromjpeg($thumbnail);
  
                                      $degrees = 270;
  
                                      $rotate = imagerotate($source, $degrees, 0);
  
                                      imagejpeg($rotate,$thumbnail);
  
                                   /* rotate fix ends */

• ffmpeg glue 4 videos on split screen with preview

  18 janvier 2023, par rst630

  I have 4 video files 480x1080 with audio - all different duration.

  


  I need 1920x1080 video

  


  _____________________________________________
|          |          |          |          |
|          |   first  |  first   |  first   |
|   play   |   frame  |  frame   |  frame   |
|          |          |          |          |
---------------------------------------------

_____________________________________________
|          |          |          |          |
|          |   play   |  first   |  first   |
|   last|  |          |  frame   |  frame   |
|   frame  |          |          |          |
---------------------------------------------


  


  when first video done 2nd column video must start and first video must show just last frame, other left 2 videos still show first frame and wait queue

  


  for example lets say we have these durations :

  


  1.mp4 - 1:00
2.mp4 - 1:35
3.mp4 - 1:20
4.mp4 - 1:05


  


  Also I can prepare screenshots of each video for preview frames (first/last)

  


  Cant even imagine how to do this job with ffmpeg or maybe exists any simplier way for shell ?

  


  example of output video https://www.youtube.com/watch?v=vdBd5-8uOTo

  


• FFMPEG binaries throw error : Undefined Symbols for Architecture x86_64

  19 octobre 2016, par Swati

  I have created a cocoa app that uses FFMPEG libraries for streaming.

  Uptill now i was using FFMPEG version 3.1.1 and i had libraries available to me. Now i downloaded the latest FFMPEG version 3.1.4.

  I executed the shell script and libraries were generated but when i use the with my xcode [6.1 or any] I get error as shown in attached image.

  Can anybody plz guide me about solving this issue.

  Thanks in advance..

  

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