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Tips & Tricks Video Series

‘How to bridge ATSC to IP using the Inca 4400 Series Transcoder’

Outputting ATSC feeds to IP using VidiOS™

This video covers how to ingress an 8VSB ATSC source and output an IP Transport stream via the Inca VidiOS™ User Interface. The Inca 4400 series chassis can all be configured using these instructions.


In this video we will cover how to ingress an 8VSB ATSC source and output an IP Transport stream via the Inca VidiOS User Interface. The Inca 4400 series chassis can all be configured using these instructions.

For this, you will need an ATSC RF source, an Inca 4400 series chassis with an 8VSB/QAM front end submodule and the appropriate RF and Ethernet cabling. A PC or laptop will be needed on the same management network the chassis is configured to for access to the User Interface.

If assistance is required to assign the management port for the Inca 4400 series chassis, please watch the How To Assign A Static IP Address Using The Serial Boot menu at the following link:

Assuming the unit is properly cabled to an 8VSB source, the management and streaming ports have been configured, and you have started both the parent device and child device the first step is to access the unit’s child device. This will default to the Sources tab and you should now observe any front end Modules installed. For this example we see two Quad tuner/demodulator front end modules. Each front end module has 4 RF ports that are connected to the 4 tuners listed here as 1.1 thru 1.4 and 2.1 thru 2.4.

We will configure Tuner 1.1 in this video. Click the notepad icon to open a source configuration window. Name the source to something that will appropriately define this source. Select ATSC from the System drop-down menu. The Frequency drop-down menu will show the EIA channel number and the frequency of the carrier. Select this according to your desired carrier. Ensure Enable this stream has been checked if you are ready to ingress this source.    

You should now observe a Locked notification, the incoming power and SNR levels and video analytics on the left of the UI. These analytics include transport stream data, a thumbnail that can be clicked for a full frame snapshot of the stream and the ability to download a 10-second sample of the source.  

Let’s create an output now. Click the IP Outputs tab near the top of the VidiOS UI. Under Direct Outputs and Probes, click the green plus sign.  A configuration window will open. Name the output as something meaningful to you. We will select Tuner 1.1 from the Source drop-down menu.  In the Source Filter field, we will select Program 1 from the source by typing P1 for Program 1. You can also change Program values and PID values for the output, if desired. The filter syntax you see here will select Program 1, change it to Program 5 on the output, remove all secondary audio, and change the video and audio to PIDs 100 and 200 on the output.

Click the Output tab in the configuration window and select the appropriate physical ethernet Port you would like to output the stream on. Assign a unique output address and select the protocol you are using in your network UDP or RTP.  When using Direct Outputs it is recommended to configure the Transport Mode as Constant and then to enter a transport rate at somewhere above the incoming video rate. In our experience, this creates the most stable Direct Output for downstream devices.

Ensure the Enable this Stream checkbox is checked and click Save. You now have bridged an ATSC, 8VSB RF source to an IP stream output. On the left side of the UI you will now also be able to observe the input stream statistics and also the output statistics. Due to the source filter previously applied…Program 1 is now Program 5, the additional audio streams have been eliminated and the video and audio PIDs are at 100 and 200.

Thank you for watching. We hope this video was helpful for how to ingress an 8VSB ATSC source and output an IP Transport stream via the Inca 4400 series VidiOS User Interface. For any further questions, please feel free to visit or give us a call. We’re here to help.