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• PHP and FFMPEG advice/sollution for a unknown issue

  20 octobre 2015, par sonam Sharma

  I am having a live video streaming website and I allow people to upload all the video files to the site till now everything is ok.

  What I am doing is that I am using FFMPEG to convert the video to mp4 and also get a image out of the video after 20 seconds.

  The code that I am using is that :

   require 'vendor/autoload.php';
  
          $getEXT_check=substr(@$_FILES['profileimage99']['name'],-3);
  
          if($getEXT_check !='mp4' && $getEXT_check !='MP4'){
  
          exec('ffmpeg -i '.$uploadfile.' -f mp4 -s 896x504 '.$new_flv.''); }
  
          //execute ffmpeg and create thumb
  
          exec('ffmpeg  -i '.$uploadfile.' -ss 00:00:20 -vframes 1  '.$new_image_path);
  
          $theduration=exec('ffprobe -v error -show_entries format=duration -of default=noprint_wrappers=1:nokey=1 '.$uploadfile.' 2>&1');
  
          $theduration_val=round($theduration/60, 2);

  What issue I am having is that

  1. sometimes the code dosent extract the image out of video
  2. video conversation takes very long time for non mp4 video (I am not converting mp4 videos)

  Some info what I have done on server. During the development of site I installed ffmpeg on my pc and downloaded the vendor directory by composer.json file. But I have not done these things on my server I have a dedicated server from bluehost and have ffmpeg installed at this location.

  /usr/local/bin/ffmpeg
  
  /usr/local/bin/mplayer
  
  /usr/local/bin/mencoder
  
  /usr/bin/flvtool2
  
  /usr/local/bin/MP4Box
  
  /usr/local/bin/yamdi

  During uploading the site what I did is that I also uploaded the vendor directory and all the files and made the site live. I haven’t used any of the path as given by my server admin after asking.

  Please suggest me something where I am doing wrong.

• Python : How to clip/trim required part from the video and move the trimmed video file to other directory

  4 avril 2021, par saurabh

  I'm trying to remove duplicate segments from videos from a directory and paste these trimmed videos to other directory.

  


  For example :

  


  I've following directory structure for saving live rtsp stream (each 1 min long) :-

  


  Live_videos
------2021-04-04
      ------stream1
            -------14 36 08.avi( 1 min)
                   14 37 08.avi( Saved only till 14 37 39 mark due to disconnect with stream1 camera)
                   14 38 35.avi( 1 min)
            stream2
            -------14 36 15.avi( 1 min)
                   14 37 15.avi( 1 min)
                   14 38 14.avi( 1 min)


  


  So, the disconnect and reconnect time are 14 37 40 and 14 38 34 respectively which will be sent to some other server and that server will search for videos saved in their machine which contains segments from the given timestamps and sends the video file in following directory structure : -

  


  Edge_videos
-----------2021-04-04
           ----------stream1
                     -------14 36 35.avi
                     -------14 37 35.avi


  


  Now, you can see that the received video files have the required segments from disconnect period as well as duplicate segments which are already saved in Live_videos directory.

  


  How do I remove the duplicate segments from the received videos and move only the required trimmed video file to the Live_videos----> stream1 directory and delete all the files from Edge_videos afterwards.

  


• Get ffmpeg info from Pipe (stdout)

  12 août 2020, par Peter Silie

  I want to call ffmpeg to get the duration of a video file. When using the command in OSX Terminal everything works fine :

  


  ffmpeg -i MyVideo.MOV 2>&1 | grep "Duration"


  


  I get this :

  


    Duration: 00:01:23.53, start: 0.000000, bitrate: 39822 kb/s


  


  It is perfect for me. But now I tried this call from within my code :

  


  func shell(launchPath: String, arguments: [String]) -> String
{
    let task = Process()
    task.launchPath = launchPath
    task.arguments  = arguments

    let pipe = Pipe()
    task.standardOutput = pipe
    
    do {
        try task.run()
        // task.launch() till 10.12, but now catchable!
    } catch let error as NSError {
        print(error.localizedDescription)
        return ""
    }
    
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output: String = NSString(data: data, encoding: String.Encoding.utf8.rawValue)! as String

    return output
}


  


  This code works fine for all other external commands. But here I get error :

  


  [NULL @ 0x107808800] Unable to find a suitable output format for '2>&1'
2>&1: Invalid argument


  


  I defined the arguments for ffmpeg like this :

  


  let arguments = ["-i", video.path, "2>&1", "|", "grep \"Duration\"" ]


  


  Even if I put them all in one argument as a larger string, it doesn't work. Using "pipe:1" instead of "2>&1" and rest of arguments results also in an error.

  


  Any idea, how I get it to work ?