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• How to run a python code via Django templates ?

  18 novembre 2018, par Iskender Berdiev

  I want to execute code below when the is submitted (project on Django) :

  from os import system, listdir, remove
  
  link = 'https://www.youtube.com/watch?v=ME9yO1KEVoo'
  
  
  
  def download(): ## Downloading a video from YouTube using youtube-dl
  
      system("youtube-dl -o download {}".format(link))
  
  
  
  def convert():  ## Converting downloaded video to mp3 format via ffmpeg.exe(same directory)
  
      listOfFiles = listdir('.')
  
      for i in listOfFiles:
  
          if i.startswith("download"):
  
              name = i
  
              system("ffmpeg -i {} download.mp3".format(name))
  
  
  
  def main():
  
      download()
  
      convert()
  
  
  
  main()

  I have tried to put this code into views.py :

  class download(TemplateView):
  
      def main(request):
  
          if request.method == 'POST':
  
              link = 'https://www.youtube.com/watch?v=ME9yO1KEVoo'
  
              system("youtube-dl -o download {}".format(link))
  
              listOfFiles = listdir('.')
  
              for i in listOfFiles:
  
                  if i.startswith("download"):
  
                      name = i
  
                      system("ffmpeg -i {} download.mp3".format(name))
  
          return redirect ('loader/wait.html')

  urls.py :

  path('wait/', views.download.as_view(), name='wait')

  and the html form which is submitted to run views.download.as_view() :

  <form action="{% url " method="POST">{% csrf_token %}
  
  <input type="submit" value="Yes" />
  
  </form>

• How do you intentionally increase/decrease livestream quality using ffmpeg

  25 septembre 2022, par Evan Hassan

  You know those sport streaming websites ? Well I am trying to watch a game from one of those website... problem is I have awful wifi.

  


  I have access to the livestream video and I am trying to change the bitrate/fps to a higher quality for website embedding using ffmpeg. I understand for a video, this is more than possible, but how do you do this for a live stream ?

  


• V-Ray .exr to mp4 ffmpeg Stuttering

  8 octobre 2024, par OlivierArgentieri

  I have an issue using ffmpeg with V-Ray exr.

  


  I'm trying to export .mp4 from .exr, so ihave used this command

  


  


  ffmpeg.exe -y -start_number 1 -framerate 25 -i D :\temp\WAC_TEST\what_about_cooking_sq01_p040_rendering_main_publish_v000.%4d.exr -pix_fmt gbrapf32le D :/out_vray_exr.mp4

  


  


  I checked parameters using

  


  


  ffmpeg.exe -y -start_number 1 -i D :\temp\WAC_TEST\what_about_cooking_sq01_p040_rendering_main_publish_v000.%4d.exr

  


  


  Result :

  


  


  Input #0, image2, from Input #0, image2, from 'D :\temp\WAC_TEST\what_about_cooking_sq01_p040_rendering_main_publish_v000.%4d.exr' :
Duration : 00:00:02.00, start : 0.000000, bitrate : N/A
Stream #0:0 : Video : exr, gbrapf32le, 2840x1210 [SAR 1:1 DAR 284:121], 25 fps, 25 tbr, 25 tbn

  


  


  Finally, Exported video are unreadable by windows player and KMplayer


  


  I can play the video using VLC. but i got stuttering frame like this :
https://www.youtube.com/watch?v=C8MawpkKGfc

  


  To understand this behaviour i have export .exr sequence to .png and i got this


  


  I also tried this command with a simple cube animation using mantra on Houdini, it's just work perfectly, but if i export this cube animation using vray, i got stuterring frame and this strange behaviour.

  


  Thank you.