Grazie - I need a favour! Vegas 6b Problem

jaegersing wrote on 5/25/2005, 2:32 AM

Hi Grazie, can you do me a favour?

Do you have a PAL TV connected as an external display for Vegas? If so, could you please try something out for me using Vegas 6?

I have a PAL DV 4:3 clip, captured in Vegas, inside a standard 4:3 PAL DV project in Vegas 6. The project Deinterlace setting is Interpolate. I Ctrl-drag the right-hand edge of the clip to make it slo-mo, roughly x0.63 speed.

When I render this to new track (default PAL DV, 4:3), and display on the external TV, the motion in the clip is very juddery/jerky. If I do exactly the same thing (same clip, same settings, same slo-mo) in Vegas 5, the output is smooth.

When I investigated further, I found that if I set the Clip Properties to Upper Field first in Vegas 6 before rendering, the output is fine. If I do the same in Vegas 5, the output is juddery. (The correct setting is Lower Field first.)

It looks as if Vegas 6 is doing something to the field order that it shouldn't, and this is affecting slo-mo clips that need to be deinterlaced. I reported this to Sony tech support, and also on this forum, but it looks like nobody else is seeing this issue.

As a favour, could you try this out on your system and see if you can reproduce the same problem? Any short clip with some movement like an arm waving will show it.

Thanks a lot mate.

Richard Hunter

Comments

Grazie wrote on 5/25/2005, 2:56 AM

. . on the case now . . just making a cuppa coffee then I'll go ahead yeah? BRB, Richard. - I've tried a lot of the features of V6 .. think I've done some slo-mo .. . I must say in all ignorance I hadn't noticed on the comparison side of things .. but I'm very interested

. . maybe we could do a "talk-through on the Vegas Cafe? Interested?

Grazie

Grazie wrote on 5/25/2005, 5:01 AM

Richard .. well I repeated using Deinterlace as Interpolate; a reduced speed value of 56% and 40% ( I was guessing this was around your 0.63 speed redux ) and then render to New track. I can't see any judder out to a PRO JVC monitor. I've got a woman waving her hand in front and around her . . nope, no judder. It's a bit "smeary" but looks quite good. AND, the properties have remained Lower Field First in the Rendered File.

Grazie

jaegersing wrote on 5/25/2005, 5:10 AM

Hi Grazie. Sorry I couldn't reply earlier, was on my way home from work.

Thanks a lot for doing the test. If you normally work with slo-mo you would spot this problem right away because it's very obvious. (If you set the clip properties to Upper Field first you should see the judder I am getting.) I guess it must be something on my system then.

Time to check all the settings again, (but I thought I'd already done that).

Thanks again.

Richard

By the way, what IS the Vegas Cafe? I've seen it mentioned but never explored further.

Grazie wrote on 5/25/2005, 7:05 AM

Nope - I don't see any judders when I switch fields either!

Here is the Cafe link:

http://www.gooddogproductions.com/chat/vegas_cafe.htm

You'll find ALL the stars of the Sony Vegas Forum chatting away!

Grazie

jaegersing wrote on 5/25/2005, 5:22 PM

Hi Grazie, thanks again for your help. If the field order is wrong, then there is usually a two steps forward, one step back kind of effect in any motion in the clip, so it is quite jerky rather than smooth. I wonder why you don't see that when you change the field order?

Anyway, I will play around with it at the weekend when I have some more time.

Richard

jaegersing wrote on 5/27/2005, 3:26 AM

Hi Grazie. In case you are interested, I found out what the problem was. For some reason, "Ignore third party DV codecs" had been UNCHECKED in my Vegas 6 installation (presumably by myself).

This caused Vegas to see the clips as Matrox DV/DVCAM type, and for some reason known only to Matrox, the default setting for Matrox DV/DVCAM PAL clips is always Upper Field first. This was the reason that Vegas was getting the field order wrong when deinterlacing. Checking the "Ignore" button makes Vegas use the Sony DV codec, and everything is hunky dory again.

Once again, thanks for your help Grazie. I was absolutely sure that this was a Vegas bug, until you confirmed otherwise.

Richard

P.S. I'll buy you a virtual coffee in the Vegas cafe sometime, OK? Or if you ever come to Singapore I'll buy you a real Tiger beer. :)

Grazie wrote on 5/27/2005, 11:29 AM

Hmmm . . . Tiger is one of my favs when we go to our local Viet-Cafe . . . real glad you got sorted . . yeah .. that 1/3 party is something to make sure about.

Grazie .. and yes .. I was interested too!