Newbie ? here on quality of playback

illazilla wrote on 6/8/2007, 5:20 PM

I have just installed VMS Platimum on both my computers and I have a question. Why when I am editing HD video, is the playback real slow when I play it. It is extremely jerky and it makes it hard to tell where my cuts are or should be. I did a quick render and it is fine there and I burned it to a DVD and it plays fine on it, so it's just in the editing that it previews bad. It is the same on both my machines(AMD 4.6GHZ dual core 2GB RAM Vista and on the older P4HT 1 gb XP) I am running a seperate 250gb hard drive where it is saved to as well. Is this normal?
Thanks for the help...I am sure I will be back for more.

Comments

ritsmer wrote on 6/9/2007, 1:28 AM

It is common - however irritating....

But no blame on Vegas:

Many factors have influence on jerky previews - i.e. I had a timeline with jmpeg-avi clips and the preview was quite OK and also the crossfades were played at stunning 25 fps - then I deshaked some of the clips and saved the deshaked clips in Windows Media 9 avi (wmv) and then: every simple crossfade including one or 2 of theese clips took approx. 5 secs to preview (for a 400 ms crossfade) - and was of course skipped.
The error was clearly not in Vegas, but in the Media 9 codec - that - among other things - only used one of my 2 processors...

Mostly preview can be improved using lower quality and/or size of the preview. You may also do a selective prerender or build a RAM preview to check special transitions etc.

There are several threads about it in this forum.
Search like jerky preview etc.

illazilla wrote on 6/10/2007, 7:15 AM

Thanks for the reply ritsmer....now that I know it is somewhat normal, I will spend my time trying to minimize it rather than totally eliminate the problem.