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• FFmpeg Overlay Filter Changes Source FPS

  24 juin 2021, par user4134414

  I want to overlay a video on top of another slow-motion video.
Surprisingly, the overlay becomes also slow-motion.

  


  I'm applying the following command :

  


  ffmpeg
  -to 00:00:01.000 -i camera1.mp4                       // original video
  -ss 00:00:02.000 -to 00:00:09.000 -i confeti.mov      // overlay video
  -filter_complex '[0]setpts=3.333*PTS[s0]; [s0][1]overlay'  // change FPS of original video and overlay
  -r 24 out.mp4


  


  The output can be seen here : out.mp4

  


  As you can see, the "confetti" overlay is slow while the original video is playing and go back to normal speed once the original video ends.

  


  Any idea why it happens and how can it be fixed ?

  


• How can we reduce the size of audio file after uploading ?

  8 novembre 2019, par Arjun Pujari

  I have used this command in the terminal to install the package : composer require pbmedia/laravel-ffmpeg. The package is successfully downloaded, but I don’t know how to use it. I don’t even know if this package can also reduce the audio file size or not.

  Anyone know any other library or package ?

      
  
          <form action="{{route('upload')}}" method="post" enctype="multipart/form-data">
  
              Select Audio to upload:
  
              <input type="file" />
  
              <input type="submit" value="upload MP3" />
  
          </form>
  
      
  
  
  
  
  
  &lt;?php

  Here is my controller. Write basic code for save file :

  namespace App\Http\Controllers;
  
  
  
  use Illuminate\Http\Request;
  
  use Pbmedia\LaravelFFMpeg\FFMpeg;
  
  
  
  class FileCompress extends Controller
  
  {   
  
      public function compressFile(Request $request)
  
      {
  
            $uploadFileName = mt_rand().time(). '.' . $file->getClientOriginalExtension();
  
            $filetype = substr($file->getClientMimeType(), 0, strpos($file->getClientMimeType(), "/"));
  
  
  
          if($filetype == 'video'){
  
  
  
            $localpath =  public_path().'/videos/'.$uploadFileName;
  
           //code for video file compress.
  
          }else{
  
            //code for audio file compress.
  
          }
  
      }
  
  }

  But I need to reduce the audio file size when a file is uploaded or reduce the file size immediately after the file upload. How can i do that ?

• Multiple running with executable built with pyinstaller

  2 avril 2020, par seokrae.kim

  I build my main.py to exe by pyinstaller like this.

  



  pyinstaller main.py --add-binary C:\sources\untitled\venv\Lib\site-packages\cv2\opencv_videoio_ffmpeg420_64.dll;.


  



  It is simple RTSP receiver program so it need opencv_ffmpeg binary to run.
Running command like this

  



  main.exe -address rtsp://127.0.0.1/profile1/media.smp


  



  It works I expected.
But when the process running in multiple, (I mean more than 2 same process running)
all process not responding and shutting down.

  



  I try clone whole result (dist folder content) to another folder
and run process another path but result is same. like this.

  



  D:\main1\main.exe -address rtsp://127.0.0.1/profile1/media.smp
D:\main2\main.exe -address rtsp://127.0.0.2/profile1/media.smp