1080i to 720-60p/30p/24p In Vegas

fldave wrote on 6/12/2006, 7:03 PM
Interesting experiment: How does a 1080i m2t from an FX1 look at 60p, and how does it compare with 30p and 24p? I brought out my trusty Peacock footage, and zeroed in on some movement areas.

Project Properties: HDV 1080i, Upper first, 29.970 (matched my m2t, and no transitions, only Studio to Computer RGB, so I kept it at 29.97); Motion Blur Gaussian; Deinterlace - Interpolated. I threw one in for 60p Blended, in case someone wants to compare.

Render As: WMV, used 720p HD setting, just changed the frame rate, 1.00 PAR (square), each set to 3 MB target rate

Links, each about 13MB, very short clip. I recommend saving them to your machine before playing (right click/Save As):
720 23.976p (IVTC Film)
720 29.97p (NTSC)
720 59.94p (Double NTSC) Interpolated

For those interested:
720 59.94p (Double NTSC) Blended

Vegas/wmv encoder appears to have successfully processed the 60p from interlaced footage, at least the frame contents are different between each other. You can place on a 60p timeline and walk the frames to verify.

I myself am thrilled with the 60p Interpolated (I haven't compared in detail with Blended yet). Even at essentially half the quality as the 30p (file sizes the same, double the number of frames). The smoothness and crispness of the peacock moving his head quickly at 60p is noticeably different than the 30p to me. Also when he is shaking his feathers and moving his head left and right, the top of his head seemed much clearer throughout the movement vs. 30p.

Of course, the old 24p vs. everything else will come up. But as a budding nature videographer/hobbiest, nature is full of chaos. Very little is smooth, planned scans or fluid movement. So my preference for this type of shot is 60p. I need to try this on some of my fountains, waterfalls and streams and compare.

Interested in feedback...

Dave

Comments

Spot|DSE wrote on 6/12/2006, 10:53 PM
Nice test. You might want to create a deliberately inverted set of frames to see how Vegas manipulates it. You'll be pleasantly surprised when going to 60p
Grazie wrote on 6/12/2006, 11:34 PM
Dave, I'm finding your "HD_Test_24p_Interpolated.wmv" as being the easiest on the eye.

Excellent set of samples.

Grazie
fldave wrote on 6/13/2006, 5:30 AM
Spot, Thanks, do you mean to invert a duplicate track to compare the differences, or to somehow generate new footage?

Grazie, I know, to each his/her own! I had a stroke from a brain injury back in 1997, and my vision was very messed up, each eye was almost in hyperdrive independent of each other (but I got mostly better). I can't tolerate a 60hz interlaced refresh rate, needs to be in the 80's, and I'm finding 24 fps is not as pleasing anymore. Before I finished my vision rehab, fast-motion/sped up clips running at 24fps sent me into seizures. Makes me wonder if I picked up the wrong hobby:)

However, if everyone likes the 24p better, then I think I need to accommodate.
Spot|DSE wrote on 6/13/2006, 6:05 AM
deliberately offset by a field, so you've inverted UFF and LFF. It *should* be a big mess, but in my experimenting (read, messing around) it's been much mo betta' than I'd expected.
Personally, I'm a bigger fan of 30p.
In your next test, don't mention framerates. Just do em' as 24p, 25p, 30p, and 60p
craftech wrote on 6/15/2006, 6:05 AM
Ditto on the 24p, but practically speaking all of them look really good and no one will have a 24p side by side to it for comparison.

John