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What is RTMPS and Why is it Important to Secure Streaming?

By Emily Krings

12 Min Read

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Emily Krings

Emily is a strategic content writer and story teller. She specializes in helping businesses create blog content that connects with their audience.

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      The technology that brings live streaming to life has evolved a lot in recent years. Broadcasters have moved away from using systems that rely on Adobe’s Flash player and are now using the ultra-compatible HTML5 video player.

      Real-Time Messaging Protocol (RTMP) is a protocol that has remained important in the live streaming process throughout its evolution. There is one variation of this video streaming protocol that is becoming more and more popular. 

      RTMPS is a variation of RTMP that has an added layer of security, which is important since piracy and cybersecurity threats are on the rise.

      In this post, we will cover everything you need to know about RTMPS and its role in live streaming. We are going to start off by discussing the history and uses of RTMP proper before discussing the ins and outs of RTMPS.

      From there, we will take a special look at RTMPS for mobile streaming before we wrap things up with a review of a few other RTMP variations and additional tools for protected streaming.

      Table of Contents

      • RTMP: The History of Multi-Purpose Protocol
      • What is RTMPS? 
      • RTMP vs. RTMPS
      • RTMPS for Mobile Streaming
      • Other RTMP Variations
        • RTMP Proper
        • RTMPE
        • RTMPT
        • RTMFP
      • Other Tools for Protected Streaming
      • RTMP vs. RTSP
      • RTMP Ingest on Dacast 
      • Final Thoughts

      RTMP: The History of the Real-Time Messaging Protocol

      Real-Time Messaging Protocol
      RTMP has served several purposes in the live streaming process over the years.

      Live streaming has evolved so much in recent years, and Real-Time Messaging Protocol (RTMP) has played several roles over the course of this evolution.

      This protocol was originally created by Macromedia, the predecessor to Adobe, to deliver content from RTMP hosting servers to the Flash video player. That function of the protocol is called “RTMP delivery” or “RTMP streaming.”

      RTMP streaming was the most popular live streaming system for a while, but it came with one major issue: the Flash video player, an essential piece of the puzzle, was not compatible with mobile streaming

      This became more of a problem as the use of iPhones and other mobile devices grew. Broadcasters knew that they were missing out on a large potential audience by not making their content accessible to viewers on smartphones.

      Apple created a solution to this problem by developing the HLS protocol which would work with the universal HTML5 video player. HLS gradually replaced RTMP for live stream delivery as Flash player phased out. 

      However, RTMP still had a place in live streaming systems that used HLS delivery. RTMP ingest was born, and the protocol was then used to transport video files from the encoder to the online video platform.

      RTMP ingest is still the standard use of RTMP in live streaming. RTMP ingest is valuable for broadcasters because it supports low-latency streaming and it is made possible by low-cost RTMP encoders.

      RTMP Encoding

      RTMP encoding
      Choosing and configuring an RTMP encoder requires a bit of research, but it doesn’t have to be confusing or complicated.

      Choosing an encoder for your live stream that is both capable and reliable is very important. Streaming platforms like Dacast that use RTMP ingest are compatible with RTMP encoders. Luckily, there are so many great RTMP encoders on the market.

      Here are a few of the best encoders that our users rely on to produce high-quality streams:

      • OBS Studio
      • Wirecast
      • VidblasterX
      • vMix
      • Teradek hardware encoders
      • TriCaster hardware encoders

      OBS Studio is our preferred encoding software because it is both free and open-source. It also supports the RTMPS protocol, which is great for protected streaming. Furthermore, the platform offers a custom version for Dacast users, which makes streaming with OBS Studio pretty seamless.

      For more information on streaming with OBS Studio on Dacast, please check out our dedicated guides for both macOS and Windows users.

      What is RTMPS?

      RTMPS is a variation of RTMP that uses extra security encryption to ensure that the stream is not intercepted by an unauthorized entity. The extra layer of security in RTMPS can be either TSL or SSL encryption.

      RTMPS can often be used interchangeably with RTMP, as long as it is supported by your chosen broadcasting tools. It is particularly useful for broadcasting on a public network. That’s why this protocol is popular for streaming from a mobile device.

      Broadcasters prefer RTMPS in many situations because of the added security that it provides.

      RTMP vs. RTMPS

      RTMPS is simply RTMP with an added layer of security for protected streaming. Aside from the fact that RTMPS is more secure, the biggest difference for broadcasters is that the live stream’s URL will start with “rtmps://” rather than “rtmp://” when you stream with the secure alternative.

      The RTMPS protocol works just like the RTMP proper protocol, so it functions the same way with HLS delivery and RTMP ingest.

      Unfortunately, there are currently some limitations with RTMPS compatibility with encoding tools, mobile streaming apps, and online video platforms. However, this should not be an issue once RTMPS becomes the norm in the near future.

      If you prefer to use RTMPS over RTMP, it is important that all of your tools are compatible and that your settings are properly configured.

      RTMPS for Mobile Streaming

      mobile live streaming
      “RTMPS” is another protocol you’ll run into when choosing a live streaming app for iPhone, but with an extra layer of security.

      RTMPS is very important for mobile streaming since people who stream on the go often use public internet networks. Public networks expose devices to other users who could hack them and create issues with security.

      Facebook Live is one of the first social streaming platforms to switch from using RTMP proper to the RTMPS protocol for live streaming for this very reason. They noticed the trend in the use of public networks and made the transition as a way to avoid infiltration from external threats.

      Experts in broadcasting have remarked that other major social streaming platforms are not yet using the RTMPS protocol despite the fact that their users generally use mobile streaming. They predict that heightened security may be applied to the content delivery network since unfortunate security breaches become more common.

      Hopefully, Periscope, Twitch, Instagram, and TikTok, and similar platforms will start using RTMPS to keep their users’ streams safe and secure.

      If you are looking for a mobile live streaming app to broadcast from your iPhone, we highly recommend choosing one that supports RTMPS.

      Other RTMP Variations

      As we mentioned, RTMPS is simply one variation of the RTMP protocol. There are several other variations of the RTMP protocol that have slightly different purposes in live streaming. 

      Let’s take a quick look at the other variations and their uses.

      RTMP Proper

      rtmp vs rtmps
      In addition to RTMP vs RTMPS, there are several other protocol variations.

      RTMP proper is the standard version of the protocol, and this is the original form of the protocol that was designed for RTMP delivery. It is built on top of the Transmission Control Protocol (TCP), which is a standard protocol for transmitting data between a client and server. 

      RTMP, on its own, has some issues with security since the protocol is relatively easy to infiltrate. That’s why programmers developed the RTMPS variation.


      RTMPE is another variation of RTMP that is used for protected streaming. The “E” in RTMPE refers to “encryption.” RTMPE uses Adobe’s security standards and is slightly simpler than RTMPS.


      RTMPT is a special variation of RTMP that encapsulates other variations of the protocol to get them past firewalls. 


      RTMFP stands for “Real-Time Media Flow Protocol,” and it is used in peer-to-peer (P2P) streaming. P2P streaming is used for video chatting and video conferencing. Apps like Zoom, Skype, and Facetime use this technology. It is also common among social media apps that support video calling, like WhatsApp and Snapchat.

      Other Tools for Secure Streaming

      RTMPS is a great starting point for protected streaming, but many broadcasters find value in layering up security measures. 

      Some of the other top tools for protected streaming include:

      • Password protection
      • Double-factor authentication (OVP login)
      • Tokenized security
      • Geographic/IP restrictions
      • Domain restrictions 

      Security tools are not just for limited access to your live stream from certain viewers. They are important for keeping your library of content, online video platforms, and viewers’ information safe, too.

      RTMP vs. RTSP

      Another clarification that we’d like to make is the difference between RTMP and RTSP. Aside from their general importance for live streaming, the two have nothing in common.

      RTMP is for transporting files whereas RTSP is for transporting commands. Specifically, RTSP is used for carrying out commands between the viewers and the video player.

      When a viewer clicks buttons in the video player, such as “Play,” “Pause,” and “Fast Forward,” RTSP lets the video player know what to do.

      There is no significant link between RTSP and RTMPS.

      RTMP Ingest on Dacast

      rtmp ingest
      Dacast supports RTMP ingest but not RTMP delivery.

      Dacast uses HLS streaming to deliver content to an HTML5 video player. However, the platform uses RTMP ingest to transport the video files from the encoder to Dacast itself.

      This setup makes Dacast a suitable option for broadcasters who need access to multi-bitrate streaming, low latency, maximum compatibility, and high-quality streaming.

      Final Thoughts

      RTMPS is a valuable protocol for broadcasters who want to keep their streams protected from any external threats. It works almost exactly like RTMP proper, but it has an added layer of security.  This protocol is particularly useful for streaming from mobile devices since it provides the extra security required for protected streaming on public networks.

      When it comes to streaming with Dacast, the protocol works seamlessly with our typical RTMP ingest functions. 

      For additional information on RTMPS or anything else related to RTMP, please contact our tech support team. An expert team member can answer your questions and point you in the direction of additional information.


      In the meantime, feel free to head over to the Knowledgebase section of our site. A quick search for “RTMP” will pull up dozens of related articles for you to browse. 

      For additional tips for live streaming, exclusive offers, and other community support, please join our LinkedIn group.

      author avatar

      Emily Krings

      Emily is a strategic content writer and story teller. She specializes in helping businesses create blog content that connects with their audience.

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