[mythtv-users] PVR-350 only records TV at MPEG-1 ??
Matt SF
spore at psibercom.org
Sun Oct 16 16:29:50 EDT 2005
Thanks, Niklas, Steve and Nick for responding. Nice to actually get some
feedback on the mythtv-users list :)
On Sat, Oct 15, 2005 at 08:13:18PM +0100, Nick wrote:
> On 15/10/05, Matt SF <spore at psibercom.org> wrote:
>
> No you are not. When trying to improve video capture quality, you
> first have to make sure you have turned off likely culprits like noise
> removal and have as clean a feed as possible. I would also suggest
> employing a test card to see exactly how much resolution the card can
> handle (you should expect S-Video to be better than composite for
> example). The 350 can _natively_ record in MPEG2 over a range of
> resolutions, from 480x480 up to 720x480.
>
> Nick
ah ok fair enough :) I just wish these companies would print a spec sheet
that's a bit more clear on the details. lines like these...
MPEG record specifications:
* NTSC format at 29.97fps: Full D1: 720x480, MPEG1: 352x240
* PAL format at 25fps: Full D1: 720x576, MPEG1: 352x288
MPEG hardware player specifications:
* NTSC output: Full D1: 720x480, MPEG1: 352x240
* PAL output: Full D1: 720x576, MPEG1: 352x288
...are misleading with all the previous usage of the term "MPEG2" in the
same document. A quick primer in their specs on "D1" would have been
helpful. e.g.: this entry from DigitalFaq.com...
D-Values. Various resolutions are often referred to as D-values. Full D1
video is 720x480. Cropped D1 is 704x480. Half D1 video is 352x480. Quarter
D1 (actually SIF) video is 352x240. Two-Thirds D1 video is 480x480. DVB
and DVD-VR use unusual MPEG resolutions, sometimes called Three-Fourths D1
at 544x480.
re: quality issues, I found that tweaking the brightness, color, and
contrast via ivtvctl did help improve the look of the 350's tv-out quite a
bit. A quick run through some MySQL commands and I had my channel
appearance preferences installed across the entire range. I did my best
to match them up visually to my Avia-tuned Sony, just eyeballing it and
switching back endlessly between TV and Video1 :)
Thanks again!
-Matt
--
-------------------------------------------------------------------------
More information about the mythtv-users
mailing list