on_play
The `on_play` directive in the NGINX RTMP module defines a callback function invoked when a stream is played.
Description
The on_play directive is intended to set a specific handler that is triggered during the play event of a stream in the RTMP server. This directive allows administrators to run custom scripts or commands in response to the event when a client successfully starts to play a stream. When defined, the callback can be used for various purposes, such as logging, authorization, or even manipulating stream parameters before they are sent to clients. The callback function can be defined to accept the stream name, client ID, and other environment details, thus providing flexibility in how the events are managed.
The invocation of the on_play directive can facilitate more interactivity and responsiveness in applications using NGINX for media streaming. This means that developers can implement additional functionalities like analytics or conditional access based on client behavior. However, developers are advised to ensure that any external commands executed within this directive are optimized, as performance impacts might arise if the handler takes considerable time to execute, potentially leading to stream delays for clients.
Config Example
application live {
live on;
on_play "play_callback";
}Ensure that the callback function is properly defined and accessible in the expected context.
Avoid blocking operations in the callback to prevent delays in stream playback.
Check that any authentication or logging mechanisms do not introduce significant latency.