[mythtv-users] Best resolutions for different video
John Goerzen
jgoerzen at complete.org
Wed Feb 7 03:02:55 UTC 2007
Hi,
I have a HD CRT TV. I'm driving it off an Nvidia card's VGA output,
then using an Audio Authority VGA to component converter. I have
gotten the TV working at 1080i, 540p, and I think I can also make 720p
work. (Both the TV and the card should be capable of it).
My question, though, is: which signal type is best for which source
material? And the corrolarry: why does deinterlacing appear to
improve the output quality when displaying an interlaced source at
1080i?
So, the major video types I'd be concerned with are:
* NTSC/ATSC interlaced digital video recorded OTA
* Interlaced DVD playback
* Progressive-scan DVDs (mostly 24fps movies)
* Any potential progressive-scan OTA content (haven't noticed any
yet, but maybe movies?)
* Interlaced content recorded on a PVR-250
My gut tells me that it is best to use 1080i for anything interlaced
and 720p for anything not interlaced. But experience suggests that I
still see interlacing artifacts when playing back interlaced content
in MythTV, even when displaying at 1080i, so I still have to use deint
there.
Also, MythTV doesn't seem to have support to switch the video mode
based on whether or not interlacing is present, so I have to adopt
some sort of compromise video mode.
What do people suggest doing in this situation?
Bear in mind that this is a CRT, so I do not have to care about
scaling artifacts that might be seen when driving LCDs at low
resolutions.
-- John
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