Various source download addresses (currently only ffmpeg and nginx)
ffmpeg source code download address:
http://ffmpeg.org/download.html#releases
nginx source code download address:
http://hg.nginx.org/nginx/branches //Note: After entering, it is the version interface, if you enter Log interface, click to download will default to the latest version, we need to click on the version interface to select the version (branches), and then click zip or gz to download.