rtmp

I've seen that many of the buffering problems exist when people only have one output variant set, at their optimal, full quality. This is fine for people who can view it, but not everyone can. We can add an alert on the video configuration page saying only one variant is configured and recommend a second, lower, quality so more people can view the content.

如在使用中遇到任何问题，欢迎提Issues，或者加我QQ:386707112，谢谢大家。也欢迎有大佬可以给我一些修改意见，谢谢。