Update RTMP.

i18n/en-us/docusaurus-plugin-content-docs/current/doc/rtmp.md

@@ -9,8 +9,10 @@ hide_table_of_contents: false
 
 RTMP is a basic and de facto standard protocol for live streaming for many years.
 
-However, Adobe neither maintaining RTMP protocol nor contributing as a RFC protocol, so many new features
-aren't supported by RTMP, such as HEVC and opus.
+However, Adobe neither maintaining RTMP protocol nor contributing as an RFC protocol, so many new features
+aren't supported by RTMP, such as HEVC and opus. By March 2023, the [Enhanced RTMP](https://github.com/veovera/enhanced-rtmp) 
+project is finally set up, supporting HEVC and AV1. SRS and OBS now support [HEVC](https://github.com/veovera/enhanced-rtmp/issues/4) 
+encoding based on Enhanced RTMP.
 
 For live streaming producing, more recent years, SRT, WebRTC and RIST have been growing rapidly. More and
 more devices supported SRT or RIST in live streaming. You're also able to use WebRTC for live streaming.

i18n/zh-cn/docusaurus-plugin-content-docs/current/doc/rtmp.md

@@ -10,6 +10,8 @@ hide_table_of_contents: false
 RTMP是直播的事实标准，这么多年以来一直是使用最广泛的直播协议。
 
 然而Adobe公司没有一直更新RTMP协议，也没有提交给标准组织比如RFC，因此很多新功能都没有支持，比如HEVC或Opus。
+直到2023.03，终于[Enhanced RTMP](https://github.com/veovera/enhanced-rtmp)项目建立，开始支持了HEVC和AV1，
+SRS和OBS已经支持了基于Enhanced RTMP的[HEVC](https://github.com/veovera/enhanced-rtmp/issues/4)编码。
 
 在流的制作方面，最近几年，SRT、WebRTC和SRT增长迅速，很多设备都支持了SRT和RIST协议。你也可以用WebRTC做直播。
 

versioned_docs/version-5.0/doc/rtmp.md

@@ -9,7 +9,7 @@ hide_table_of_contents: false
 
 RTMP is a basic and de facto standard protocol for live streaming for many years.
 
-However, Adobe neither maintaining RTMP protocol nor contributing as a RFC protocol, so many new features
+However, Adobe neither maintaining RTMP protocol nor contributing as an RFC protocol, so many new features
 aren't supported by RTMP, such as HEVC and opus.
 
 For live streaming producing, more recent years, SRT, WebRTC and RIST have been growing rapidly. More and