[mythtv-users] Re: MythTV & pcHDTV

[Eric Nichols]

Thanks for the clarification.  Things make sense now that your mention that HD
is broadcast in MPEG.  So changing the quality level of the recording has zero
effect on how the video is initially stored.  So really the menu item for
pcHDTV transcoder should be removed?


Doug Larrick said:
> Eric Nichols wrote:
>> Playback of the initial recorded show is very jittery and the front end log
>> shows buffering problems.  I've RTFM'ed and read as many posts I could find.
>> I am running a 2ghz machine with nv 5200/256m video card.  Yes all the
>> switches are turned on for XV and advanced sound buffering.  And yes I have
>> pulled the frontend cvs and compiled it.  No luck, same problem.
>
> I believe this frontend is underpowered for decoding/displaying HD
> material.  a 2.8 GHz P4 w/ HyperThreading seems to be about the minimum.
>  You may have better luck if you turn on XvMC support, though be
> forewarned it seems some operations can freeze playback with this option
> turned on -- search the archives (at gossamer-threads) for details.
>
>> Back to my question...
>> Can I reduce the capture resolution of my pcHDTV card?
>
> No, pcHDTV isn't really a capture card, just a demodulator.  The
> encoding is done at your TV station and you're recording the MPEG stream
> as broadcast.  You might have better luck transcoding after recording is
> done, though this is quite CPU-intensive.  Again, the archives are
> probably your friend.
>
> -Doug