preview windows got the jitters! at DVinfo.net

Stuart Campbell · December 28th, 2006, 09:23 AM

Yep, another question from a PP2 to Vegas 7.0c convert. Why does my preview footage jitter? It doesnt jitter when looking from trimmer tab. Even if it is set to Preview Full and best quality, it's only SD 25p and my computer has;

Intel Pentium Core 2 duo 2.66
2 g RAM
2 x 320gb Raid 0 HDDs
1 x 80gb HDD for system etc
Nvidia GForce GeForce 7950GT
Cineform Connect for HD work

I can preview rushes perfectly from media manager, trimmer, etc, but as soon as I put any footage on the timeline it all goes pear shaped. I don't want to have to selectively prerender all my rushes added to the timeline! An hour long project would take forever! It should play fine! What am I doing wrong?

This computer 'flies' in PP2! I even get better playback when using Premiere Elements!

Please someone point out the blindingly obvious for me.
Thanks

Alastair Brown · December 31st, 2006, 02:01 PM

I'd love to offer you an answer but.......it bugs the heck out of me as well! I'm running in PAL what are you in?

Stuart Campbell · January 1st, 2007, 05:33 PM

yep, PAL for me too. Are you running a powerful machine too?

I ended up deleting the project I was working on and starting again. The problem seems to be caused by applying any envelope effect (such as pan, crop, motion blur, fade to colour ) etc etc etc. You'll notice this applies a thin red line to the whole of your key timeline. I guessed it was due to Vegas trying to render the entire timeline in realtime regardless of where the actual effect transition really was! I seem to have cured the problem by hitting 'S' and splitting the timeline and moving the area I want to manipulate down onto another track and applying my effect there, thus only affecting a small portion of the project rather than the whole. You'll notice the effect is applied to the 'track' and not the area you are working. This is one thing I'm not too keen on in Vegas so far.

Having said all that...I still don't understand why something like that should affect my rendering in the preview image when I'm editing Standard Def DV, especially when I've had one hell of a powerful edit machine built!

I'm also finding that Vegas crashes 8 times out of 10 when I try to selectively prerender a portion of video with many effects applied. Sony's answer was to back up my registry and re-install Vegas! Thanks Sony, I only installed Vegas for the first time last week on a brand new edit specific machine! Does'nt bode well!

Let me know how you get on and good luck.

Alastair Brown · January 3rd, 2007, 04:02 AM

I think you answered your question. By applying filters/effects, you are asking Vegas to work too hard.

My PC is only a 3200 Athlon with 2Gb of ram and a 250Gb 7200rpm 16Mb Buffer system drive.

December 28th, 2006, 09:23 AM	#1
Stuart Campbell Major Player Join Date: Nov 2006 Location: Hannover, Germany Posts: 400	preview windows got the jitters! Yep, another question from a PP2 to Vegas 7.0c convert. Why does my preview footage jitter? It doesnt jitter when looking from trimmer tab. Even if it is set to Preview Full and best quality, it's only SD 25p and my computer has; Intel Pentium Core 2 duo 2.66 2 g RAM 2 x 320gb Raid 0 HDDs 1 x 80gb HDD for system etc Nvidia GForce GeForce 7950GT Cineform Connect for HD work I can preview rushes perfectly from media manager, trimmer, etc, but as soon as I put any footage on the timeline it all goes pear shaped. I don't want to have to selectively prerender all my rushes added to the timeline! An hour long project would take forever! It should play fine! What am I doing wrong? This computer 'flies' in PP2! I even get better playback when using Premiere Elements! Please someone point out the blindingly obvious for me. Thanks

December 31st, 2006, 02:01 PM	#2
Alastair Brown Major Player Join Date: Aug 2006 Location: Glasgow/Scotland Posts: 626	I'd love to offer you an answer but.......it bugs the heck out of me as well! I'm running in PAL what are you in?

January 1st, 2007, 05:33 PM	#3
Stuart Campbell Major Player Join Date: Nov 2006 Location: Hannover, Germany Posts: 400	yep, PAL for me too. Are you running a powerful machine too? I ended up deleting the project I was working on and starting again. The problem seems to be caused by applying any envelope effect (such as pan, crop, motion blur, fade to colour ) etc etc etc. You'll notice this applies a thin red line to the whole of your key timeline. I guessed it was due to Vegas trying to render the entire timeline in realtime regardless of where the actual effect transition really was! I seem to have cured the problem by hitting 'S' and splitting the timeline and moving the area I want to manipulate down onto another track and applying my effect there, thus only affecting a small portion of the project rather than the whole. You'll notice the effect is applied to the 'track' and not the area you are working. This is one thing I'm not too keen on in Vegas so far. Having said all that...I still don't understand why something like that should affect my rendering in the preview image when I'm editing Standard Def DV, especially when I've had one hell of a powerful edit machine built! I'm also finding that Vegas crashes 8 times out of 10 when I try to selectively prerender a portion of video with many effects applied. Sony's answer was to back up my registry and re-install Vegas! Thanks Sony, I only installed Vegas for the first time last week on a brand new edit specific machine! Does'nt bode well! Let me know how you get on and good luck.

January 3rd, 2007, 04:02 AM	#4
Alastair Brown Major Player Join Date: Aug 2006 Location: Glasgow/Scotland Posts: 626	I think you answered your question. By applying filters/effects, you are asking Vegas to work too hard. My PC is only a 3200 Athlon with 2Gb of ram and a 250Gb 7200rpm 16Mb Buffer system drive.