如何在django rest框架中从上传的视频生成缩略图？

from rest_framework.decorators import api_view
from django.core.files import File
from PIL import Image
import subprocess

@api_view(['POST'])
def upload_video(request):
    video_file = request.FILES.get('video')
    
    # Save the video file to a location
    video_path = 'path/to/save/video.mp4'
    with open(video_path, 'wb+') as destination:
        for chunk in video_file.chunks():
            destination.write(chunk)
    
    # Generate thumbnail using FFmpeg
    thumbnail_path = 'path/to/save/thumbnail.jpg'
    subprocess.call(['ffmpeg', '-i', video_path, '-ss', '00:00:01', '-vframes', '1', thumbnail_path])
    
    # Create a thumbnail image object
    thumbnail = Image.open(thumbnail_path)
    
    # Resize the thumbnail if needed
    thumbnail.thumbnail((200, 200))
    
    # Save the thumbnail
    thumbnail.save(thumbnail_path)
    
    # Return the thumbnail path or save it to the database
    return {'thumbnail_path': thumbnail_path}