dvb: URL scheme

[1] DVB が使っているデジタル放送用 URI scheme です。

[2] 例: dvb://current.ait/Orgid.Appid?arg_0=val (出典: MHP 1.1 仕様書)

[3] Broadcast video and HTML in digital set-top box environment (1998-07-01 03:49:20 +09:00 版) <http://www.w3.org/Architecture/1998/06/Workshop/paper09/> (名無しさん)

[4] Real-time extensions for HTML on interactive digital television (1996-09-17 21:05:30 +09:00 版) <http://www.w3.org/AudioVideo/9610_Workshop/paper22/paper22.html> (名無しさん)

[5] HbbTV 2.0 Specification (2015-02-02) (2015-02-10 01:01:20 +09:00 版) <http://www.hbbtv.org/pages/about_hbbtv/HbbTV_specification_2_0.pdf#page=44>

[6] MPlayer - The Movie Player (2018-04-18 05:15:11 +09:00) <http://www.mplayerhq.hu/DOCS/HTML/en/MPlayer.html#dvb>

To show the first of the channels present in your list, run
mplayer dvb://
If you want to watch a specific channel, such as R1, run
mplayer dvb://R1
If you have more than one card you also need to specify the number of the card where the channel is visible (e.g. 2) with the syntax:
mplayer dvb://2@R1