从 m3u8 合并视频

[live9999]

比如这样
ffmpeg -i rtsp://wowzaec2demo.streamlock.net/vod/mp4:BigBuckBunny_115k.mov test.mp4
ffmpeg -i https://kuku.zuida-youku.com/20170612/WK4PuVjt/600kb/hls/index.m3u8 test.mp4