Questions About Frame Rate and Interlacing with Vegas :)

[Kero777]

In the past few days I have been doing a lot of experimenting with AviSynth and VirtualDubMod while reading the guide here: http://www.animemusicvideos.org/guides/avtechbeta/. My mind is a little jumbled from all this new information, so I apologize ahead of time if these questions are unclear.

Anyway, Before I converted my footage to lagarith, I checked if my footage is progressive and it is. After I converted it to lagarith and imported into Vegas 6.0 it doesn't tell me if it's progressive or interlaced right above the project media tag like it used to with the original DIVX file, instead it says field order=lower field first. I made sure that when I was converting to lagarith in V-Dub that the stream was set to None(progressive scan). I always thought anything to do with fields was interlaced footage. Does that mean that the footage is interlaced now or should I be okay and can I still keep my field order to NONE when rendering my final video from Vegas?

Secondly, since I'm really trying to concentrate on the quality of my video footage, I looked into frame rate as well. I need it to be at 29.97fps, but it is originally 25fps. Should I change the frame rate after creating my AMV (render it from Vegas with it's original frame rate (25fps) and then change it with Avisyth and go on to render the final video from V-Dub), OR should I change the frame rate before creating my AMV then it will be all set? 25fps to 29.97 fps seems like a huge change. I'm not sure if editing the frame rate before importing into Vegas would look alright because it speeds the footage up or if doing it after the render will diminish quality or accuracy or make it look weird. Maybe saving at 29.97fps from Vegas when the footage is at 25fps looks fine, but I haven't the slightest idea. Like I said, I really want to concentrate on Visual quality.

Please give me suggestions or tell me what you think what works best in most cases. Thanks a lot!

[Kero777]

I forgot to ask: Wouldn't the audio and video be mismatched if the fps is changed in AviSyth after rendering the AMV in Vegas? *Feels dumb*

[taifunbrowser]

yes: the trick is to follow the guides on this site for preparing your footage, then frameserve with vfapi to vegas.

Ignore everything vegas says about the footage, and your field order doesn't really matter (to my experience, I use lower field because its the default).

vegas gives some really weird answers when it comes to this sort of stuff. Be confident you did it right already, and it'll turn out fine

[JaddziaDax]

i usually use progressive scan, because ive had issues with interlacing and that seems to fix the problem

[Kero777]

Thanks, you two! Yes, interlacing seems to really diminish quality. I will trust I did it correctly, like you said, taifunbrowser.

My friend said that changing the frame rate in Vegas doesn't really mess up the video. I wonder why not. I did some more experimenting with Avisyth and I think doing it after the video if needed is the best way. One weird thing is that GSpot detects some of my footage playing at 119 fps... I wonder what on earth that is about? When playing in Winamp though it plays at 25fps... oh well.

Anyway, thanks!