code outsourced to tasks.py, videos are converted during upload

backend/videoflix/content/signals.py

@@ -1,8 +1,7 @@
 from .models import Video
+from content.tasks import convert_video, create_thumbnail
 from django.dispatch import receiver
-from django.conf import settings
 from django.db.models.signals import post_save, post_delete
-import ffmpeg
 import os
 
 @receiver(post_save, sender=Video)
@@ -11,24 +10,13 @@ def video_post_save(sender, instance, created, **kwargs):
     Generates a thumbnail for a newly created `Video` instance.
     """
     if created:
-        video_file_path = instance.video_file.path
-        thumbnail_dir = settings.THUMBNAIL_DIR
+        #Convert Video
+        convert_video(instance.video_file.path, "480")
+        convert_video(instance.video_file.path, "720")
+        convert_video(instance.video_file.path, "1080")
                
-        thumbnail_filename = os.path.splitext(os.path.basename(video_file_path))[0] + '.jpg'
-        thumbnail_path = os.path.join(thumbnail_dir, thumbnail_filename)
-        absolute_thumbnail_path = os.path.abspath(thumbnail_path)
-
-        if not os.path.exists(thumbnail_dir):
-            os.makedirs(thumbnail_dir)
-
-        try:
-            ffmpeg.input(video_file_path, ss=1).output(absolute_thumbnail_path, vf='scale=300:-1', vframes=1).run(overwrite_output=True)
-            instance.thumbnail = os.path.relpath(thumbnail_path, start=settings.MEDIA_ROOT)
-            instance.save()
-
-            print("New video and thumbnail generated")
-        except ffmpeg._run.Error as e:
-            print(f"An error occurred: {e.stderr.decode()}")
+        #Create Thumbnail
+        create_thumbnail(instance)
             
 @receiver(post_delete, sender=Video)
 def auto_delete_file_on_delete(sender, instance, **kwargs):

backend/videoflix/content/tasks.py

@@ -0,0 +1,36 @@
+import subprocess
+import ffmpeg
+import os
+from django.conf import settings
+
+def convert_video(source, resolution):
+    target = source + f'_{resolution}p.mp4'
+    target = remove_first_mp4(target)
+    ffmpeg_path = '/opt/homebrew/bin/ffmpeg'
+    cmd = [ffmpeg_path, '-i', source, '-s', f'hd{resolution}', '-c:v', 'libx264', '-crf', '23', '-c:a', 'aac', '-strict', '-2', target]
+    result = subprocess.run(cmd, capture_output=True, text=True)
+    
+def remove_first_mp4(filename):
+    name_part, ext_part = filename.split('.mp4', 1)
+    new_filename = name_part + ext_part
+    return new_filename
+  
+def create_thumbnail(source):
+    video_file_path = source.video_file.path
+    thumbnail_dir = settings.THUMBNAIL_DIR
+        
+    thumbnail_filename = os.path.splitext(os.path.basename(video_file_path))[0] + '.jpg'
+    thumbnail_path = os.path.join(thumbnail_dir, thumbnail_filename)
+    absolute_thumbnail_path = os.path.abspath(thumbnail_path)
+
+    if not os.path.exists(thumbnail_dir):
+        os.makedirs(thumbnail_dir)
+
+    try:
+        ffmpeg.input(video_file_path, ss=1).output(absolute_thumbnail_path, vf='scale=300:-1', vframes=1).run(overwrite_output=True)
+        source.thumbnail = os.path.relpath(thumbnail_path, start=settings.MEDIA_ROOT)
+        source.save()
+
+        print("New video and thumbnail generated")
+    except ffmpeg._run.Error as e:
+        print(f"An error occurred: {e.stderr.decode()}")