Genvid Ingest sample¶
The Genvid Ingest sample shows you how to add an RTMP Ingest server in your project using gvencode, which allows you to work with an external A/V source.
Note that you can only add audio and video streams to the composition. The Ingest server can’t receive data streams or notifications, nor can it send commands or events.
For this sample, we will start with the Genvid Studio sample and we will replace the second instance of the Tutorial sample with the Ingest server and a local instance of OBS Studio (version 20 or later) to connect to it, providing us a second source for a webcam, for example.
Configuring the cluster¶
Follow the Genvid Studio sample instructions to start all the services. Verify everything works correctly, then stop the services.
Next, load the Ingest configuration:
py ingest.py load
Use the Cluster UI to verify that the Ingest job is present. Click the Start All button to restart the services. When the Ingest link turns blue, right click it and select Copy link address.
Configuring OBS¶
To set up OBS Studio:
- Download and install OBS Studio.
- Configure it and select the scene you want to stream.
- Select the Stream Parameters panel in Settings.
- Select
Custom Streaming Server
and paste the URL you- copied. (It should start with
rtmp://
.)- If your browser added
unsafe-
to the URL, delete it.
- Verify your video settings match those of the output. (The
- tutorial sample defaults to
1280x720 @ 30 FPS
.)
Now you can start streaming.
Composing the stream¶
Go back to Cluster UI
and click the Studio
link. Your stream is now the
second source. See The Studio website for information on working with
your broadcast stream.
Script reference¶
Ingest sample script
usage: ingest.py [-h] [--loglevel {DEBUG,INFO,WARNING,ERROR}] [-c CLUSTER_ID]
{unload,load,env} ...
Positional Arguments¶
command | Possible choices: unload, load, env |
Named Arguments¶
--loglevel | Possible choices: DEBUG, INFO, WARNING, ERROR Set the script log level |
-c, --cluster_id | |
The cluster id. Default local |
Streams timing¶
This section covers the timing of audio / video streams when several sources are involved in a production.
The following figure shows the deployment of a production with a first source that shows the game and a second source that contains the audio and video of a commentator. The second source can be used in PIP, voice-over, or as is. This diagram also shows that a director makes the realization of the diffusion with the Genvid Studio.
Any processing on a stream results in a delay on the stream. This delay is mainly due to the encoding, decoding, and transmission of streams. The typical delay between the gamer and the director is about 15 frames or 0.5 seconds. The delay between the commentator and the director is about 3 seconds.