Alright, the title is very grand, but I don't have much to say.

First, let's talk about Google, Netflix, Firefox, Microsoft and other big players leading the AOM AV1. This is to "defeat" the super unfriendly licensing fee of H265, using a new generation of video encoding developed based on Google's VP10 (which was abandoned and incorporated into AV1). It is completely open source and free. It can be expected that this will be the hottest alternative to H265. In my opinion, apart from RTMP, AV1+DASH/HLS is one of the best solutions for live streaming in the future. Of course, there is still room for improvement in terms of latency.

Next, let's talk about the H265 encoding with a big mouthful of blood. Everyone was looking forward to it before it came out, but when it came out, they were shocked by the licensing fees. The very complex licensing traps make it difficult for large, medium and small companies. In terms of performance, major professional media have written about it, so I won't go into detail. But it is certain that it has improved a lot compared to H264. Comparing it to AV1, it seems that AV1 is slightly better. In the future, there will definitely be many companies using H265, but its share will inevitably be swallowed up by AV1, even a large part of it.

Based on the two most popular options above, I am most optimistic about the prospects of AV1+DASH. First of all, AV1 is open source and free for commercial use, which avoids many licensing traps. Secondly, the use of DASH is more convenient, and multi-resolution/bitrate switching is very flexible and convenient. Moreover, there is no specific requirement for video encoding. Thirdly, RTMP is limited by Adobe's development progress, so far, H265 has been out for several years, and the official still does not support H265.

As for iOS, it's better to stick with HLS. Although DASH can be used, the official clearly doesn't want you to use it, so save some energy.

Welcome to add more!!

P.S. Please make sure to pay attention to AV1 and integrate it into SRS, ffmpeg should support it.

Reference:
http://media.pkusz.edu.cn/achievements/?p=138
https://www.jianshu.com/p/ad8544e2d3fd