Question about .ts (transport stream) file (1 Viewer)

wayloncovil

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August 19, 2015
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Hi, all.

I've been wondering about this for a few months and thought I'd ask the question...

My local ATSC PBS (Public Broadcasting System for those not familiar) television station has 3 streams. 10.1, 10.2, 10.3.

When I record 10.1, does the .ts contain 10.1, 10.2 & 10.3?

And if it does...
When I click on the file to play it in VLC for example, does VLC know to play 10.1?
How could I watch the other subchannels?

Thanks!
 

RonD

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  • Team MediaPortal
  • December 20, 2011
    911
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    SillyValley CA
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    I've never read the ATSC spec gory details, but at a high level the PBS station sends bits at about 18 mbps with the data split into 3 independent bit streams (sub channels 10.1, 10.2, 10,3) with ATSC defined ID/control bits that define how to find the different sub-channels. The MP tv server uses this info to split out the sub-channel (10.1 for example) and only writes the 1 sub-channel in the Recording.TS file. If you choose to record 2 shows (10.1, 10.2 etc) at the same time that are on the same Physical Channel, MP can use 1 tuner to receive and record both at the same time to 2 different Recording.TS files

    To get some idea on how your PBS station sends the data, you can look at http://www.rabbitears.info/market.php select your city then channel

    I'm near San Francisco, my PBS is KQED 9.1. 9.2, 9.3 see http://www.rabbitears.info/market.php?request=station_search&callsign=35500# if you click on Technical Data and Screencaps it shows more details with various PMTs/PIDs that are used to ID/define the various subchannels for audio/video.

    For even more details, see TSReader Data: http://www.rabbitears.info/screencaps/ca-sfo/35500-0_0.htm

    The tuner card/chips, device drivers, and MP TV Server software takes care of the details to make this work.

    For more info than you/me really want to worry about
    https://en.wikipedia.org/wiki/Advanced_Television_Systems_Committee_standards
    http://atsc.org/standards/
     

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