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StreamCatch

StreamCatch EN

Ben Tran · Firefox

Catches M3U8 manifest and subtitle links (VTT, SRT) from network requests on user-allowed sites.

105用户 v5.3当前版本
权限提示 该扩展申请访问所有网站(<all_urls>),意味着它可以读取你在任意站点的页面内容,包括已登录的页面。这是许多扩展正常工作的必要条件,但也值得你确认来源可信。

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简介

StreamCatch is a powerful and lightweight browser extension for developers, power-users, and media enthusiasts who need to locate and capture streaming media links from the web.

Have you ever needed to analyze a video stream, debug a media player, or simply save a master playlist for offline use with a tool like yt-dlp? StreamCatch simplifies this process by observing the network traffic of a webpage and intelligently identifying the master playlist (.m3u8) and any associated subtitle files (.vtt, .srt).

It's a simple, focused tool designed to do one thing perfectly.

Key Features:

  • Master Playlist Detection: Automatically identifies the main M3U8 manifest file, not just the lower-quality segments.
  • Subtitle Catching: Finds and lists all VTT, SRT, or other text-based subtitle files associated with the video stream.
  • Intelligent Metadata: Displays the highest available resolution and video/audio codecs directly in the popup, so you know exactly what you're getting.
  • One-Click Command: Generates a clean, ready-to-use yt-dlp command with the correct referer and a sanitized filename, copied to your clipboard in a single click.
  • User Control: A comprehensive options page allows you to either allow all sites by default or create a specific whitelist for targeted use.

IMPORTANT: How to Use for Video Downloads

StreamCatch is a link-finding utility, not a standalone downloader. It is designed to work hand-in-hand with powerful, open-source command-line tools.

  1. Install yt-dlp: You must have yt-dlp installed on your computer. Follow the official installation instructions on their GitHub page.
  2. Install FFmpeg: yt-dlp requires the free FFmpeg tool to merge the video and audio streams into a final MP4 file. Make sure FFmpeg is installed and accessible in your system's PATH.
  3. Use the "Copy Command" Button: When StreamCatch detects a video, click the "Copy Command" button in the popup.
  4. Paste and Run: Paste the command into your Terminal (macOS/Linux) or Command Prompt/PowerShell (Windows) and press Enter. yt-dlp will handle the rest!

StreamCatch 是做什么的

StreamCatch 是一款面向 Firefox 的影音图像类扩展,主要用来处理图片、调节音量、增强播放器功能。官方对它的介绍是:Catches M3U8 manifest and subtitle links (VTT, SRT) from network requests on user-allowed sites.在Firefox 附加组件商店(AMO)上,它当前版本 5.3,约 105 名用户。

适合什么人用

从功能定位看,StreamCatch 更适合经常在网页上看视频、听音乐或处理图片的用户。如果你平时只是偶尔遇到相关需求,用浏览器自带功能也能凑合;但如果这件事每天都发生,装一个专门处理它的扩展通常比手动操作省事得多。需要注意的是它作用于所有网站,装上后建议先观察一两天,确认不影响常用站点的正常使用。

怎么安装 StreamCatch

  1. 打开Firefox 附加组件商店(AMO)上的官方页面;
  2. 点「添加到浏览器」并确认权限提示;
  3. 装好后在扩展列表里固定图标,方便随时开关。

本站只做索引与介绍,安装包来自官方商店。如果商店页面提示当前地区不可用,说明该扩展未在你所在区域上架。

常见问题

StreamCatch 是免费的吗?

StreamCatch 在Firefox 附加组件商店(AMO)免费提供下载。它是浏览器扩展,装上就能直接用,不需要注册账号。

StreamCatch 安全吗?

它只申请了 0 项权限,范围比较克制,没有申请「读取所有网站数据」这种大权限。

StreamCatch 支持哪些浏览器?

当前收录的版本来自Firefox 附加组件商店(AMO),适用于 Firefox。同一个扩展在其他商店可能有对应版本,但功能与版本号不一定相同。

怎么卸载 StreamCatch?

在扩展管理页找到 StreamCatch,点移除即可。它在本地保存的设置会一起清掉,不会残留数据。

权限清单 来自 manifest.json 原文

站点访问 1

  • <all_urls>

接口权限 4

  • downloads
  • storage
  • tabs
  • webRequest

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