把本机 ffmpeg 包成六个结构化工具：探流、转码裁剪、均匀抽帧、扒音轨，以及按目标体积做两遍编码压缩。
curl -fsSL https://www.dshhub.co/install.sh -o dshhub-install.sh && bash dshhub-install.shAlready have DSH? Skip the wizard and install the market directly:dsh plugin --profile web add dshhub-market
This plugin installs only from the plugin side.