I tried recording at 704x480 and 720x480, and you are correct that if I put a piece of paper to measure the size of some objects there is a measurable difference. So I suppose I'll start using 704x480 :-) Not that I'll re-record all the stuff I've recorded before since 2% is really hard to see, but I guess 704x480 will be the 'correct' way.
-- Ray
Ray Cole wrote:
Do a cvs update and rebuild now - changes since last week might get a (tiny) fraction more quality ;)
I did that last night, but haven't done any serious encoding yet.
Hmmm, the 'yuvycsnoise' filter could probably be dropped - even when I
was using a Bt878 card that filter didn't seem to make any difference
(for better or for worse).
I noticed a big difference in quality with my Bt878 card, particularly with credits and other white text that appears. I love this filter :-)
If you're capturing at full frame square pixel (which for a Bt878 is
640x480) then you are scaling/resampling to 704x480 and not 720x480
I hope. If the latter then the aspect ratio is being distorted about 2%.
I'm not actually using it to scale. I'm just using it to crop the edges. I could do that in a number of places, but just chose to stay with yuvscaler. I'm actually using 'nuppelrec' to capture (actually with a couple of modifications I've made over the past year to record raw frames only, and at 48K rather than 44.1K for audio, as well as some modifications to some other routines to make sure no frames are dropped...works great, and haven't lost a single frame in probably > 200 hours of recording). I tell it to capture at 720x480 and I haven't noticed any distortion. Should I really be capturing at 704x480 instead? I don't do any scaling beyond the capture phase and it all looks fine to me, so I assume I'm OK, but could give capturing at 704x480 a shot.
-- Ray
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