Preview Auto = Half?

AVsupport wrote on 3/28/2019, 1:08 AM

On my main 4K monitor, I can make my preview window large enough to fit the full project size 1920x1080 frame. I also have an external monitor which is 1920x1080. Both will display 1920x1080 happily if [Preview=Full] is selected.

However, if I select [Preview=Auto], the Preview and Display shrinks to 960x540 which is equivalent to "Half".

VP16 manual suggests (p.424) "The Auto setting will adjust the frame size to fit the Video Preview window size."

In my case, this is not the case. Some internal calculations don't seem to work out, thus maybe affecting preview performance, ending up with dropped frames? (Source material is 4K)

Comments

fr0sty wrote on 3/28/2019, 2:32 AM

Maybe Vegas is detecting something preventing completely smooth playback, and is downscaling as a result. Perhaps at full res, it works good enough to edit, but maybe there's the occasional dropped frame that flags vegas to drop it a notch.

AVsupport wrote on 3/28/2019, 4:16 AM

...but maybe there's the occasional dropped frame that flags vegas to drop it a notch.

Well there is, where there is cuts from one clip to the next. As if there isn't enough 'read ahead' internal buffer set for 4K or VP isn't looking far enough ahead..once a clip is playing there's no dropped frames usually..

Dexcon wrote on 3/28/2019, 4:33 AM

Leading on from fr0sty's point, right click on the Preview Screen and check whether or not 'Adjust Size and Quality for Optimal Playback' is checked. If it is checked, then fr0sty's reasoning could very probably be exactly what is happening.

AVsupport wrote on 3/28/2019, 4:43 AM

check whether or not 'Adjust Size and Quality for Optimal Playback' is checked.

This option is only available if 'Scale Video to fit Preview Window' is selected. Then the 'Display' gets blown up but 'Preview' resolution still stays Half of 1080... what I want is Preview=Display=1080..that should be possible hmm

fan-boy wrote on 3/28/2019, 6:48 PM

Preview-->Auto with "Scale video to fit preview window" .or , Alt-Shift_4 to view Full screen .

"Auto" does reduce resolution in the Vegas Viewer . Vegas Viewer resolution does NOT affect render quality .

since you are using square pixel footage , "Simulate aspect ratio" should NOT be needed .

Preview-->Auto should improve Time Line responsiveness . While using "simulate aspect ratio" does reduce Time Line performance .

AVsupport wrote on 3/28/2019, 7:00 PM

Preview-->Auto with "Scale video to fit preview window" .or , Alt-Shift_4 to view Full screen .

I don't need to preview 'Full Screen' on my 4K monitor, as a full 1920x1080 fits perfectly fine on a quarter of the screen realestate, and on the external monitor.

Question is, why is 'Auto' downsizing when it shouldn't?

fan-boy wrote on 3/28/2019, 10:16 PM

I do NOT have a 4k monitor so I can't duplicate everything you do . But , How do you use the Viewer ? when I use the Viewer I have : "Show Tool Bar" OFF , "Show Status Bar" OFF , "Show Transport Bar" OFF . Those 3 Bars take up extra room that the View can use , they can cause "Auto" to reduce the size .

AVsupport wrote on 3/28/2019, 10:54 PM

Those 3 Bars take up extra room that the View can use , they can cause "Auto" to reduce the size

And they did. Even though it didn't look like it. [Feelin' really stupid right now..]

Thanks for pointing out the obvious @fan-boy , user error. Case Closed ;-)