Undersampling= Loss of Resolution and Fuzziness?

musman wrote on 10/17/2003, 1:42 PM
Think I may finally have figured out my loss of resolution and fuzziness issue I posted before. Someone had mentioned checking super sampling. Couldn't find anything about that, but I did find the fuzziness disappeared when I removed the undersampling I applied to the clip. Months ago before I even bought vegas I posted a question regarding trying to get the sped up look of silent films. Someone advised me to undersample and apply a velosity envelope, but it seems undersampling can affect resolution quite a bit.
Still not sure why in preview mode there isn't much of a difference but the difference is huge in 'good' or 'best' settings. Or why text look better defined in preview. Oh well, you can't have everything.

Just wanted to thank everyone for all your time and concern trying to help me out.

Comments

Chienworks wrote on 10/17/2003, 3:11 PM
It's probably more the velocity envelope that was causing the fuzziness than the undersampling. Using the velocity envelope brings in automatic resampling, which can combine adjacent frames together and make composite images from multiple frames. Try still using both undersample and the velocity envelope, but also select Disable Resample in the clip's properties. This should return you to sharp single images in each frame.
johnmeyer wrote on 10/17/2003, 7:54 PM
After reading this, plus the previous poster's thread on the same subject, it once again shows how nice it would be to have some sort of "audit" tool in Vegas to let you know if you are inadvertently doing something out of the ordinary. I've got to believe that the problem here has something to do with a setting, such as resample or motion blur, that has been accidentally enabled.
JJKizak wrote on 10/17/2003, 8:08 PM
Excellent idea for a menu popup which can be disabled by the people who already know. Even some kind of summary prior to rendering stating that these settings will give a certain kind of performance. Like "are you sure you want to format this drive"

JJK
farss wrote on 10/17/2003, 9:50 PM
Can't felp much on the undrsampling bit but text will look better in preview because the resolution of a PC monitor is much higher than a TV or video monitor. Also in preview you will not see any of the nasty artifacts that a composite video feed introduces.

There's been quite a bit of discussion about this on the forum, do a search. This isn't a V issue, just the limitations of the various video systems,
musman wrote on 10/19/2003, 1:34 AM
Thanks everyone for the help. Chienworks- I tried what you said about switching to Diable resample, but the fuzziness remained and was unaffected. I removed the velosity envelope and the the fuzziness also remained. But, once I took out the undersampling, the picture was clear again. Clear even withthe velosity and default resampling setting. I know the velosity envelope does degrade the image a bit, but the undersampling does it in a major and obvious way and much much worse.
Is this normal?
jaegersing wrote on 10/19/2003, 6:38 AM
Not sure if this will help in your case, but I would suggest to try changing the project settings for interlacing. I found that selecting Blend Fields gives flickering images when there is camera pan or zoom movement. This can be helped by using the Reduce Interlace Ficker setting on every affected clip, but there is a loss of sharpness when I do this.

Changing the interlace settings to Interpolate removed the flicker and the pictures stayed sharp.

Richard Hunter