python与视频下载

目的：把网站的视频下载到本地，然后处理，添加中文字幕

脚本：

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#coding:utf-8
import requests
import os
from concurrent.futures import ThreadPoolExecutor

def download_video_segment(i, base_url, output_directory):
    """
    下载单个视频片段
    """
    #num_str = str(i).zfill(6)
    output_filename = os.path.join(output_directory, f"video_{i}.ts")
    
    # 检查文件是否已存在，如果存在则跳过下载
    if os.path.exists(output_filename):
        print(f"Video {i + 1} already downloaded, skipping...")
        return

    #url = f"{base_url}{num_str}.ts"
    url = f"{base_url}{i}.ts"
    response = requests.get(url, stream=True)
    
    if response.status_code == 200:
        with open(output_filename, 'wb') as f:
            for chunk in response.iter_content(chunk_size=1024):
                if chunk:
                    f.write(chunk)
        print(f"Downloaded video {i + 1}")
    else:
        print(f"Failed to download video from {url}")

# 用户输入的URL、视频名称和结束索引
#user_input_url = input("请输入视频片段的URL：")
base_url = input("请输入视频片段的URL：")
video_name = input("请输入视频的名称：")
end_index = int(input("请输入视频的结束索引："))

# 处理URL以生成base_url
#base_url = user_input_url.rstrip("-1.ts")

# 下载视频的其他参数
start_index = 1
output_directory = "downloaded_videos"

if not os.path.exists(output_directory):
    os.makedirs(output_directory)

# 使用线程池进行多线程下载
with ThreadPoolExecutor(max_workers=10) as executor:
    for i in range(start_index, end_index + 1):
        executor.submit(download_video_segment, i, base_url, output_directory)

# 检查下载并合并视频片段
video_files = [os.path.join(output_directory, f"video_{i}.ts") for i in range(start_index, end_index + 1)]
missing_files = [f for f in video_files if not os.path.exists(f)]

if missing_files:
    print("以下视频片段缺失，无法进行合并：", missing_files)
else:
    # 所有文件都存在，可以合并视频
    video_files_str = "|".join(video_files)
    output_file_name = f"{video_name}.mp4"
    command = f"ffmpeg -i \"concat:{video_files_str}\" -c copy {output_file_name}"
    os.system(command)
    print(f"Videos have been merged into {output_file_name}!")


使用方式：python3 fs2mp4_v5.py
输入参数url地址

例如，网站的地址是
https://videos/xxxxxxxxxxx/g=210005-10.ts
那么输入的url参数就是https://videos/xxxxxxxxxxx/g=210005-

输入参数url的结束索引，例如500
那么意味着将会从 https://videos/xxxxxxxxxxx/g=210005-1.ts 到 https://videos/xxxxxxxxxxx/g=210005-500.ts

会下载500个ts文件，并把它合并为一个MP4视频。