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• How to i find common fragments on two audios

  11 septembre 2018, par Endy Bermúdez R

  I need to know how can i identify and extract a fragment of common audio in two differents auidio files ?

  I’m developing a music application and I couldn’t find a way to do it. I have been researching about some libraries as Pyaudio and Librosa, but I think that there aren’t a direct form to make it.

  Please, help me. Thanks

• Encoded Video's path gets changed in database after encoding with ffmpeg and celery and works as normal without celery

  16 novembre 2020, par Danny

  I have this code to transcode video and it works well without celery. With celery, the path of the file in the database shows a different path and the video cannot be played in the browser, but it saves the file in the correct location in the pc.

  


  If I don't use celery, then the file path in database is media/videos/videos/<filename>.mp4</filename> and file also gets saved here. This way the template is able to play the video. But if I use celery, the output gets saved in media/videos/videos/<filename>.mp4</filename> but the path in database will be media/<filename>.mp4</filename> somehow and thus template can't play the video.

  


  Is it because my page gets updated before the task ? and not getting saved properly ?

  


  views.py

  


  def post(self, *args, **kwargs):
    form = VideoPostForm(self.request.POST or None, self.request.FILES or None)
    if form.is_valid():
        video = form.save(commit=False)
        video.user = self.request.user
        video.save()
        form.save_m2m()
        # task_video_encoding(video.id)
        task_video_encoding.delay(video.id)
        return redirect('videos:my_video_home')
    else:
        raise ValidationError('Check all form fields.')


  


  encoding.py

  


  def encode_video(video_id):
    video = VideoPost.objects.get(id = video_id)
    input_file_path = video.temp_file.path
    # print(input_file_path)
    input_file_name = video.title
    #get the filename (without extension)
    filename = os.path.basename(input_file_path)
    # print(filename)
    # path to the new file, change it according to where you want to put it
    output_file_name = os.path.join('{}.mp4'.format(filename))
    # print(output_file_name)
    # output_file_path = os.path.join(settings.MEDIA_ROOT, output_file_name)
    output_file_path = os.path.join(settings.MEDIA_ROOT, 'videos', 'videos', output_file_name)
    # print(output_file_path)

    for i in range(1):
        subprocess.call([settings.VIDEO_ENCODING_FFMPEG_PATH, '-i', input_file_path, '-codec:v', 'libx264', '-crf', '-preset',
                    '-b:v', '3000k', '-maxrate', '-bufsize', '6000k', '-vf', 'scale=-2:720',
                    '-codec:a', 'aac', '128k', '-strict', '-2', output_file_path])
    # Save the new file in the database
    video.file = output_file_name
    video.save(update_fields=['file'])
    print(video.file)
    video.temp_file.delete()


  


  models

  


  class VideoPost(models.Model):
    user                = models.ForeignKey(settings.AUTH_USER_MODEL, on_delete=models.CASCADE, blank=True, null=True)
    title               = models.TextField(max_length=1000)
    temp_file           = models.FileField(upload_to='videos/temp_videos/', validators=[validate_file_extension], null=True)
    file                = models.FileField(upload_to='videos/videos/', validators=[validate_file_extension], blank=True, max_length=255)
    post_date           = models.DateTimeField(auto_now_add=True, verbose_name="Date Posted")
    updated             = models.DateTimeField(auto_now_add=True, verbose_name="Date Updated")
    slug                = models.SlugField(blank=True, unique=True, max_length=255)


  


  Can anyone help me how to change this code in a way to show the converted video properly in the template.

  


• ffmpeg isnt working or giving errors

  19 avril 2014, par user3549636

  FFmpeg isnt converting videos (or saving them, I honestly dont know) and isnt even giving me any error, whats wrong ? heres my code :

      @{
  
  WebSecurity.RequireAuthenticatedUser();
  
  var db = Database.Open("PhotoGallery");
  
  var fileName = "";
  
  var uploader = WebSecurity.CurrentUserId;
  
  var date = DateTime.Now.Date;
  
  var extention = "";
  
  if(IsPost){
  
   var numFiles = Request.Files.Count;
  
   if(numFiles <= 0){
  
       ModelState.AddError("fileUpload", "Please specify at least one photo to upload.");
  
   }
  
   else{
  
       var fileSavePath = "";
  
          var uploadedFile = Request.Files[0];
  
      fileName = Path.GetFileNameWithoutExtension(uploadedFile.FileName).Trim();
  
          extention = Path.GetExtension(uploadedFile.FileName).Trim();
  
      string ndom = Path.GetRandomFileName();
  
      var none = ndom.Remove(ndom.Length - 4);
  
      fileSavePath = Server.MapPath("~/Images/userpics/" +
  
        none + extention);
  
      uploadedFile.SaveAs(fileSavePath);
  
  
  
  
  
  string AppPath = Request.PhysicalApplicationPath;
  
  string inputPath = AppPath + "~/Images/userpics/" + fileName + extention;
  
  string outputPath = AppPath + "~/Images/userpics/" + fileName + ".flv";
  
  string imgpath = AppPath + "~/Images/userpics/thumbnails/";
  
  string cmd = " -i" + " " + inputPath + " " + outputPath;
  
  System.Diagnostics.Process proc = new System.Diagnostics.Process();
  
  proc.StartInfo.FileName = Server.MapPath("~/bin/ffmpeg.exe");
  
  proc.StartInfo.Arguments = cmd;
  
  proc.StartInfo.UseShellExecute = false;
  
  proc.StartInfo.CreateNoWindow = true;
  
  proc.StartInfo.RedirectStandardOutput = false;
  
  proc.Start();
  
  
  
  
  
       var insertCommand = "INSERT INTO Videos (FileTitle, UploadDate, UserId, ext, Name) Values(@0, @1, @2, @3, @4)";
  
       db.Execute(insertCommand, fileName, date, uploader, extention, none + extention);
  
  
  
       Response.Redirect(Href("~/Photo/View", db.GetLastInsertId()));
  
       }
  
  }
  
  }
  
  <h1>Upload Video</h1>
  
  
  
  <form method="post" enctype="multipart/form-data">
  
  @Html.ValidationSummary("Unable to upload:")
  
  <fieldset class="no-legend">
  
      <legend>Upload Photo</legend>
  
      @FileUpload.GetHtml(addText: "Add more files", uploadText: "Upload", includeFormTag: false)
  
      <p class="form-actions">
  
          <input type="submit" value="Upload" title="Upload photo" />
  
      </p>
  
  </fieldset>
  
  </form>
  
  
  
  <p class="message info">
  
  The maximum file size is 50MB.
  
  </p>

  btw i thought i should mention ffmpeg.exe is in my websites bin directory (only ffmpeg.exe)