[mythtv] pcHDTV NTSC<->ATSC

Jason Hoos jhoos at thwack.net
Fri Sep 17 17:39:46 EDT 2004

Todd Freeman wrote:
> On Tue, Sep 14, 2004 at 06:16:14PM -0500, Jason Hoos wrote:  
>> I toyed around (mentally) with various ideas to either get tv_rec to
>> be able to switch recorders, but I haven't come up with anything yet
>> that seemed elegant.  Once that gets solved, there's still the issue
>> of whether the frontend needs logic to switch decoders (unless
>> somehow it already can), and whether or how the backend would tell
>> the frontend that it needed to, etc... 
>> If you want, I can share the changes I made so far if I still have
>> them (not sure if I do or not), since they may work sufficiently at
>> least for scheduled recording.
> I would love to compare them to mine..  nothing like 2
> programmers hitting one subject to find an eligant solution. :}

Well, I played a bit more with things the other night, and ran into another
snag.  This time the problem stems from the fact that the ATSC video comes
over /dev/video32, while the NTSC comes over /dev/video0.  I fixed it so
that NuppelVideoPlayer is set up to read from the right device, but I'm
still getting no video from it, presumably because the device isn't being
set up properly.  From what I saw it looks like most of the actual setup
code is in the Channel class, so I need to look into getting that class to
also figure out which device to use.  I haven't gotten that far yet, and I
probably won't have time to until next week.

As for the part about getting playback to switch formats, and what if
anything Myth does if you switch capture cards while watching live TV (I
haven't tried throwing a second capture card in my machine yet, so I have no
idea if or how it handles that in LiveTV, or if LiveTV just locks itself to
one card at a time).


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