from pathlib import Path from pytube import YouTube import numpy as np from decord import VideoReader, cpu import imageio def download_youtube_video(url: str): yt = YouTube(url) streams = yt.streams.filter(file_extension="mp4") file_path = streams[0].download() return file_path def sample_frames_from_video_file( file_path: str, num_frames: int = 16, frame_sampling_rate=1 ): videoreader = VideoReader(file_path) videoreader.seek(0) # sample frames start_idx = 0 end_idx = num_frames * frame_sampling_rate - 1 indices = np.linspace(start_idx, end_idx, num=num_frames, dtype=np.int64) frames = videoreader.get_batch(indices).asnumpy() return frames def get_num_total_frames(file_path: str): videoreader = VideoReader(file_path) videoreader.seek(0) return len(videoreader) def convert_frames_to_gif(frames, save_path: str = "frames.gif"): converted_frames = frames.astype(np.uint8) Path(save_path).parent.mkdir(parents=True, exist_ok=True) imageio.mimsave(save_path, converted_frames, fps=8) return save_path def create_gif_from_video_file( file_path: str, num_frames: int = 16, frame_sampling_rate: int = 1, save_path: str = "frames.gif", ): frames = sample_frames_from_video_file(file_path, num_frames, frame_sampling_rate) return convert_frames_to_gif(frames, save_path)