640x480 in at highest quality?

joelaff wrote on 6/18/2004, 12:56 PM
What is the highest quality to get a 640x480 clip in to Vegas? I actually have another factor working against me aparently. My clip is from another editor and is tagged at 30 fps, not 29.97. It seems that, no matter what re-sampling setting I use, Vegas still resamples the video because of the frame rate. ( I believe)

I see some interlacing caused by the resampling. This clip has no interlacing is is 30p (It is really 29.97p, but the clip is marked at 30p).

So I re-exported the clip and scaled it in Fusion to make it a 720x480 and 29.97 (Did a proper scale and tagging of frame rate) Now Veags is handling it fine, and it looks great.

My question is what is the best way to deal with a clip like this? I tried adjusting the playbackrate to .999 (which Vegas thinks makes it 29.97) and that did not do away with the resampling I was seeing.

Again, I would love to see a feature in Vegas to:
A) Conform the frame rate (interpret the frame rate) to whatever the user decides.
B) Crop a clip in the media properties for a standard crop for every use of the media.
C) Actually completely turn off resampling, regardless of framerates.

Thoughts?

Comments

Chienworks wrote on 6/18/2004, 12:59 PM
A) i've asked for before, or even play the clip at the project's frame rate rather than the clip's frame rate.

C) is easy. Right-mouse-button click on the event, choose properties, and disable resampling.
joelaff wrote on 6/18/2004, 1:04 PM
>>C) is easy. Right-mouse-button click on the event, choose properties, and disable resampling.

I was getting temporal resampling even with this set to disable resampling. I am assuming this was because my clip was 30fps and my timeline 29.97.

I MIGHT be confused about this. The clip was also 640x480. So perhaps this had something to do with the scaling.

It just seems to be that a thorough interpret setting would be ideal.
TheHappyFriar wrote on 6/18/2004, 1:15 PM
Why not change your project to 30fps then? And you could set your project to 640x480 (and if you re-render it out, it shouldn't be a problem (i've renderd 30fps 640x480 to 29.97 720x480 many many times).

29.97 is so close to 30fps, that you shouldn't be getting any artificts at all. I've put in 30fps video onto my timrine and haven't had a problem. what was the file compressed with?
joelaff wrote on 6/18/2004, 1:57 PM
>Why not change your project to 30fps then? And you could set your project to 640x480 (and if >you re-render it out, it shouldn't be a problem (i've renderd 30fps 640x480 to 29.97 720x480 >many many times).

Most of my footage is 29.97. Just two clips are 30fps. But they are just MARKED at 30fps. They are really meant to run at 29.97

>29.97 is so close to 30fps, that you shouldn't be getting any artificts at all. I've put in 30fps >video onto my timrine and haven't had a problem. what was the file compressed with?

I ran some further test. What happens is that the video slips a field around 14 sec or so, which is the proper time difference between 29.97 and 30. As soon as it slips a field it looks terrible. Note that is is with resampling disabled.

This behavior makes sense given the difference in the input FPS vs. the timeline fps. Again, Vegas need a tool to conform or interpret a clip to whatever framerate the user desire.

What does seem to work in my further testing is this: Set the playback rate (not undersample rate) to 0.999. And then also disable resampling. This seems to play the source frame for frame, unmodified. In a round-about sense the playback rate seems to be like an interpret setting. Sadly the playback rate does not show an fps. But luckily the undersample rate just below it does. So you can tweak the undersample rate until it shows the FPS you want. Then plug this number into the playback rate, and reset the undersample rate to 1.0.

Seems to work. Comments?