Telegram audio bot thumbnail get blur

Python Help
1

I’m trying to make a telegram bot with a pyrogram for downloading music from YouTube. its succes but im getting problem the audio thumbnail getting so blur. I tried this code to adjust the blur but still not reduce the blur.:

def resize_image_from_url(url, output_path, name):
    try:
        thumb = url
        req = requests.get(thumb)
        file = BytesIO(req.content)
        img = Image.open(file)
        print(f"Image size: {len(req.content)} bytes width: {img.width} height: {img.height}")
        img.thumbnail((320, 320))
        print(f"Resized image size: {img.size} bytes width: {img.width} height: {img.height}")
        
        # Include the name in the output file path
        output_file_path = os.path.join(output_path, f"{name}.png")
        
        img.save(output_file_path, "PNG", optimize=True)
        return output_file_path

    except Exception as e:
        print(f"Error processing image: {e}")
        return None

And the yt downloading code

@app.on_callback_query(filters.create(lambda _, __, query: query.data.startswith("mytb")))
async def download_mp3(client, callback_query):
    with ThreadPoolExecutor() as executor:
        # Extract the URL from the callback data
        await app.send_message(callback_query.message.chat.id, "Downloading Your Audio...")
        video_id = callback_query.data.split('.', 1)[1]
        url = f"https://www.youtube.com/watch?v={video_id}"

        # Download the audio
        ydl_opts = {
            'format': 'bestaudio/best',
            'outtmpl': f'{downdir}/%(title)s-%(uploader)s.%(ext)s',
            'postprocessors': [{
                'key': 'FFmpegExtractAudio',
                'preferredcodec': 'mp3',
                'preferredquality': '320',
            }],
        }

        with yt_dlp.YoutubeDL(ydl_opts) as ydl:
            info_dict = ydl.extract_info(url, download=True)
            title1 = info_dict['title']
            author = info_dict['uploader']
            duration = info_dict['duration']
            thumbnail = info_dict['thumbnail']
            title = f"{title1}-{author}"
            mp3_path = os.path.join("bot/music/youtube", f"{title}.mp3")

            # Prepare the thumbnail
            song_name = title1.replace(" ", "_")
            song_name = re.sub(r'[\\/*?:"<>|]', "", song_name)  # remove invalid characters
            thumbnail_name = f"{song_name}_thumbnail"
            output_path = "bot/music/youtube"
            thumbnail_file_path = resize_image_from_url(thumbnail, output_path, thumbnail_name)

            # Send the audio file
            await app.send_chat_action(callback_query.message.chat.id, enums.ChatAction.UPLOAD_AUDIO)
            await app.send_audio(callback_query.message.chat.id, audio=mp3_path, title=title, performer=author, duration=duration, thumb=thumbnail_file_path)

        executor.shutdown(wait=True)
        await app.send_message(callback_query.message.chat.id, f'Audio downloaded')

        # Delete the audio files
        if os.path.exists(mp3_path):
            os.remove(mp3_path)

If there my code have a problem? or telegram thumbnail audio is not supported with a size of 320 x 320, and telegram audio only uses blur for audio thumbnails?