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From the MythTV Wiki: Capture CardsMythTV is designed to work with capture devices that have tuners. Our device has no tuner so it has to be configured in an irregular way that is not as well supported by the MythTV devs. First review pertinent information from their documentation. <small>From the MythTV Wiki: [http://www.mythtv.org/wiki/MythTV-HOWTO_-_0.26#Capture_Cards Capture Cards]From the MythTV Wiki: Video SourcesFrom the MythTV Wiki: [http://www.mythtv.org/wiki/MythTV-HOWTO_-_0.26#Video_Sources Video Sources]From the MythTV Wiki: Input ConnectionsFrom the MythTV Wiki: [http://www.mythtv.org/wiki/MythTV-HOWTO_-_0.26#Input_Connections Input Connections]''On this screen, you will associate the various video sources you defined earlier with a physical input to a encoder card. It's entirely possible that you have multiple tuners, and each tuner has a different input, so on this screen you let MythTV know which device will connect to which input source. Don't add a video source to a hardware input if you don't actually have anything connected there. For example, adding "Cable" to the Tuner and to the Composite inputs without having something connected to Composite will lead to blank recordings.'' ''On this screen, you will associate the various video sources you defined earlier with a physical input to a encoder card. It's entirely possible that you have multiple tuners, and each tuner has a different input, so on this screen you let MythTV know which device will connect to which input source. Don't add a video source to a hardware input if you don't actually have anything connected there. For example, adding "Cable" to the Tuner and to the Composite inputs without having something connected to Composite will lead to blank recordings.'' </small>