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FFmpeg

RTMP Pull Streaming: What It Is and How to Set It Up

RTMP pull is a client reading a stream already served by an RTMP server. Learn the URL details, FFmpeg commands, local MediaMTX test, security considerations, and troubleshooting steps.

By DocumentaryTube Team 5 min read
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RTMP pull means a player or media tool connects to an RTMP server and reads a stream that is already available there. To test it, you need the server’s read URL and an active stream at that path; an ingest URL used to publish video may not work as a playback URL.

What RTMP pull means

RTMP is a streaming protocol carried over TCP/IP. In a pull workflow, the client initiates a connection to a server and asks to read a stream. In a publish workflow, a source such as FFmpeg or OBS sends video to a server. RTMP can be used for both directions, but they are different connections and may use different URLs or credentials.

A pull client cannot retrieve video from a computer that is not serving a stream. The server or upstream provider must already make the stream available at the requested path. MediaMTX documents reading an RTMP stream with FFmpeg and gives rtmp://localhost/mystream as an example URL (MediaMTX: Read with FFmpeg).

What you need before connecting

  • A server or streaming provider that is currently serving the stream.
  • The correct read/playback URL, including the hostname, port if required, application or path, and any credentials.
  • A client that supports RTMP and the source stream’s codecs.
  • Network access to the server’s host and port.

Ask the service administrator for the read URL and authentication details. Do not assume a publishing or ingest URL is also a read URL: server conventions differ. FFmpeg’s protocol documentation describes URL components that can include credentials, host, port, application, instance, and playpath (FFmpeg Protocols Documentation).

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Read an existing RTMP stream with FFmpeg

Use the server’s actual read URL in place of the local example. This MediaMTX-documented command reads the stream and requests stream copy into an MP4 file:

ffmpeg -i rtmp://localhost/mystream -c copy output.mp4
  1. Replace localhost with the server hostname and mystream with the stream’s path. Include a port or credentials only when the provider specifies them.
  2. Run the command while the stream is live and reachable. -i identifies the input URL; -c copy asks FFmpeg to copy the encoded streams rather than re-encode them.
  3. Check the resulting file and FFmpeg output for errors. Stream copy avoids transcoding, but it does not make every source codec compatible with every output container. If the codecs do not fit MP4, use a compatible container or configure transcoding as appropriate.

The command is a documented example, not a guarantee that every URL, authentication scheme, or codec combination will work unchanged (MediaMTX: Read with FFmpeg).

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Set up a local pull test with MediaMTX

For a local demonstration, start an RTMP server first, then publish a source to it. Only after the source is publishing to the server can a second FFmpeg process pull the stream. MediaMTX documents the publishing command below; run it on a machine with file.mp4 available and MediaMTX listening at the example address.

1. Publish a file to the server

ffmpeg -re -stream_loop -1 -i file.mp4 -c copy -f flv rtmp://localhost:1935/mystream

-re reads the file at its normal playback rate, -stream_loop -1 repeats it indefinitely, and -f flv selects the publishing format used in the MediaMTX example. -c copy requests no re-encoding. This command assumes the local server and path match the example; configure the server and source codecs accordingly (MediaMTX: Publish with FFmpeg).

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2. Pull the published stream

In another terminal, run the read command from the previous section against the matching server and stream path. If the publisher and reader use separate computers, replace localhost with the server’s reachable hostname or address, and ensure the configured port is reachable.

3. Publish from OBS instead

OBS can publish to MediaMTX as an RTMP client. In OBS, open Settings → Stream, choose Custom, enter the RTMP server URL, then start streaming. The MediaMTX example uses rtmp://localhost/mystream and leaves the stream-key field empty because the path is already included in the URL. That is an example-specific arrangement: other servers may require a separate stream key, a different path, authentication, or another port (MediaMTX OBS Studio publishing guide).

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RTMP, RTMPS, and URL security

Plain rtmp:// is not encrypted. RTMPS is the TLS-encrypted RTMP variant documented by FFmpeg. Use an RTMPS endpoint only when both the client and server support it, and make sure the client trusts the server’s certificate. MediaMTX also documents encrypted RTMP publishing with certificate configuration; its setup details depend on the server configuration (FFmpeg Protocols Documentation; MediaMTX OBS Studio publishing guide).

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Common connection problems

Symptom What to check Practical fix
Connection refused or timeout Server status, hostname, port, firewall, and network reachability. Confirm the server is running and listening on the specified port; use the hostname and port provided for the endpoint.
URL connects but no stream is found Whether a publisher is active and whether the path matches exactly. Start the source publisher and verify the application/path with the server administrator.
Authentication or access failure Whether the URL is the read endpoint, and whether credentials or tokens are required. Obtain the playback URL and current read credentials from the provider; do not reuse publishing details unless instructed.
Playback or output fails despite a connection Client codec support and, when saving, whether the source codecs fit the chosen container. Use a compatible player/container or transcode where needed instead of assuming stream copy is universally compatible.
Plain RTMP works but secure RTMP does not RTMPS support on both ends and certificate trust/configuration. Confirm the secure endpoint and certificate setup with the server operator.

MediaMTX documents RTMP reading while recommending RTSP for its own FFmpeg read workflow. That is a MediaMTX-specific recommendation, not a universal ranking of protocols (MediaMTX: Read with FFmpeg).

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Managed pull inputs and operational choices

A self-hosted setup gives you control over the server, path, and configuration, but you are responsible for making the stream available and keeping the service reachable. Managed services can instead accept source URLs: the AWS Elemental MediaLive User Guide documents an RTMP pull input with one or two source URLs. The cited feature description establishes that capability; it does not establish current pricing or partner terms (AWS Elemental MediaLive User Guide).

Choose based on whether you want to operate a server, the provider’s URL and authentication requirements, supported codecs and protocols, security configuration, and operating cost. The available documentation does not establish a universal RTMP latency or reliability figure, so compare those characteristics for the specific service and configuration rather than relying on a protocol-wide number.

Or let it run in the cloud

If your goal is to keep prerecorded video running as a 24/7 YouTube live stream rather than to pull an existing RTMP feed, StreamNeo is a separate cloud workflow: upload a recording or build a playlist, add your YouTube stream key once, and go live. It plays uploaded videos to YouTube; it does not pull an existing RTMP feed or stream from a camera.

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Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.

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