Historically, RTMP has been difficult to provision through firewalls.

RTMP does not elegantly support advanced resolutions, in part due to lack of HEVC support but also because RTMP cannot be used at high bitrates due to bandwidth limitations.

RTMP does not support HEVC encoded streams.

Support for RTMP is waning, and CDNs are decommissioning RTMP entry points in favor of HLS and MPEG-DASH.

The reality is that RTMP simply isn’t scaling for today’s contribution challenges. In this post we’ll explore some of the challenges that RTMP presents for contribution streaming in “the first mile” – getting your stream from the live event to the cloud for distribution via CDN – and a few alternative protocols worth considering.

Although Adobe announced that it will no longer support Flash, RTMP remains a commonly used protocol for live streaming within production workflows. Initially a proprietary protocol, RTMP was originally developed by Macromedia (now Adobe) for real-time streaming of video, audio, and data between a server and Flash player.

Free rtmp server