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• ffmpeg php encoding trace encode failures

  27 février 2014, par user1575946

  I am executing ffmpeg from php's exec

  function convertToMP4($sourceFile,$outputfile)
  
  {
  
      $Command="ffmpeg -i ".$sourceFile.".".$outputfile." 2>&1";
  
      exec($Command,$result,$status);
  
      return $result;
  
  
  
  }

  I am getting result of the entire command to an array

  $result.

  My question is ,how can I exactly find out if a video fails to encode.

  Thank you.

• Getting disordered frame (see image) when using FFMPEG and OpenCV inside docker

  29 juin 2023, par Alvaro Alfaro

  I am consuming an UDP video streaming (from my windows host), when I use the FFMPEG and OpenCV in windows to get the frames, everything is working as expected (completed frames and right colours).

  


  Once I introduce the solution to a docker container, the frames that I am getting are similar to this one :

  


  disorder images parts in the frame

  


  Also, as in the video we have data stream and video, we are using this ffmepg command to receive raw video frames in another process :

  


  process = sp.Popen(shlex.split('ffmpeg -hide_banner '                        # Set loglevel to quiet for disabling the prints ot stderr
                                   '-i "udp://localhost:13437?pkt_size=1348" '                                        # Input stream
                                   '-map 0:v:0 -c:v rawvideo -pix_fmt bgr24 -f:v rawvideo pipe:2  ' # rawvideo format is mapped to stderr pipe (raw video codec with bgr24 pixel format)
                                   #'-map 0:d -c copy -copy_unknown -f:d data pipe:1 '            # Copy the data without ddecoding.
                                   '-report'),                                                   # Create a log file (because we can't the statuses that are usually printed to stderr).
                                    stdout=sp.PIPE, stderr=sp.PIPE)


  


  I have tested by reducing the packet size but the problem persists.

  


  Thanks in advance !

  


• iFrameExtractor no ffmpeg with build_universal script

  15 août 2016, par AlecGamble

  I’m trying to follow this tutorial on how to extract the frames from an iphone video :

  http://www.codza.com/extracting-frames-from-movies-on-iphone#more-343

  It says to do the following :

  • open Terminal
  • clone the repository : git clone git://github.com/lajos/iFrameExtractor.git
  • go to the ffmpeg folder in the project : cd iFrameExtractor/ffmpeg
  • build the ffmpeg libraries : ./build_universal

  So there’s no ffmpeg folder in iFrameExtractor after cloning the repository so I went to the github page and it says to download the latest version of ffmpeg and move to to the ffmpeg folder (I presume it just means within iFrameExtractor) :

  • Download the latest ffmpeg (0.11.1 tested) :
    git clone git://source.ffmpeg.org/ffmpeg.git

  So I’ve done that but there’s no file or directory when I try to run ./build_universal and I can see that there isn’t.

  Any ideas what I’m doing wrong ?

  Alternatively I was also looking at just installing ffmpeg-ios and trying to extract the frames myself :

  https://github.com/kewlbear/FFmpeg-iOS-build-script

  and I’ve run the script so I’ve got that folder in my xcode project as well but I’m unsure on how to link it properly ?