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• "TypeError : byte indices must be integers or slices, not str" Converting bytes to ints

  13 janvier 2017, par Lewis

  I am using a different program (ffmpeg) to grab the length of a youtube video that was downloaded in order to randomize a specific point in the video. However I am getting this error when I am trying to execute this code :

  def grabTimeOfDownloadedYoutubeVideo(youtubeVideo):
  
      process = subprocess.Popen(['/usr/local/bin/ffmpeg', '-i', youtubeVideo], stdout=subprocess.PIPE, stderr=subprocess.STDOUT)
  
      stdout, stderr = process.communicate()
  
      matches = str(re.search(b"Duration:\s{1}(?P<hours>\d+?):(?P<minutes>\d+?):(?P<seconds>\d+\.\d+?),", stdout, re.DOTALL).groupdict()).encode()
  
      print(matches)
  
      hours = int(matches['hours'])
  
      minutes = int(matches['minutes'])
  
      seconds = int(matches['seconds'])
  
      total = 0
  
      total += 60 * 60 * hours
  
      total += 60 * minutes
  
      total += seconds
  
      print(total)
  
  </seconds></minutes></hours>

  The matches variable prints out to this :

  b"{'minutes': b'04', 'hours': b'00', 'seconds': b'24.94'}"

  So all of the output comes out with a ’b’ at the beginning of it. How do I remove the ’b’ and just get the number ?

  Full error message here :

  Traceback (most recent call last):
  
    File "bot.py", line 87, in <module>
  
      grabTimeOfDownloadedYoutubeVideo("videos/1.mp4")
  
    File "bot.py", line 77, in grabTimeOfDownloadedYoutubeVideo
  
      hours = int(matches['hours'])
  
  TypeError: byte indices must be integers or slices, not str
  
  </module>

• 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 ?

• FFMpeg command output shows 'green pixelated' video

  18 janvier 2021, par DonX

  I am trying to take a single image and add audio resulting in a video playing the entire song with that single image ; much like you see for YouTube videos for songs. The command I am using is from this link : https://askubuntu.com/questions/868283/image-audio-mp4-how-to-make-video-smaller

  


  This is the command :

  


  ffmpeg -loop 1 -framerate 1 -i image.png -i song.aac -c:v libx264 -preset veryslow -crf 0 -c:a copy -shortest output.mp4


  


  It works as intended for having the video file be a small size, and the song plays as well, but depending on the image I used, some of the images appear 'Green' when playing the video.

  


  However though, this command works for any image used :

  


  ffmpeg -loop 1 -framerate 1 -i image.jpg -i music.mp3 -c copy -shortest output.mp4


  


  But the result is a very big file whereas I would like it to be smaller. Any help would be greatly appreciated ! Thank you !

  


  FFMpeg version : 4.3.1