Vegas - jerky playback, Premiere - smooth playback

Victor wrote on 3/7/2003, 1:32 AM
Many times I posted about Vegas jerky preview on external monitor thru OHCI 1394 under WIn XP. Still I don't solve the problem. I realized all of recommendation about it.

The last, I downloaded Premiere 6 tryout from Adobe site. Now I have Vegas and Premiere on the same computer. Vegas has jerky playback, Premiere has smooth playback.

Now anybody want to say about IRQ and other useless things?

SOFO, please answer, do you acknowledge that problem or not with Vegas?
Not only me have the same problem and "symptoms" are very similar.

Comments

zued wrote on 3/7/2003, 2:40 AM
I also suffer from jerky playback.. ( using Soundblaster audigy platina )
zcus wrote on 3/7/2003, 5:38 AM
I had jerky playback also - not now though :) This is what I did - take out any other firewire cards or cards with firewire ports and make sure it is not sharing IRQ's - Put your firewire card in the second PCI slot - so AGP slot - PCI slot(free if possible) - and firewire card.

I think haveing a card above the firewire card somehow creates the problem.

Give that a wirl :)
seeker wrote on 3/7/2003, 8:10 AM
Victor,

"I downloaded Premiere 6 tryout from Adobe site."

I thought Premiere was at version 6.5.

-- Seeker --
RBartlett wrote on 3/7/2003, 9:29 AM
Creative Labs soundcards have a high bus hold and latency considering that they serve audio (and some, DV). This won't help matters.

Also Premiere has a concept of compression codec conformity within a project. You only get DV preview with AP6 or AP6.5 if the sources on your timeline are the right type of DV and the project is set to DV and they exactly match-up, and for areas of FX after you have pre-rendered for preview. This in my opinion makes AP6 more DV centric than Vegas. Not that either of them are limited to DV alone and both support compressed and codecs that really shouldn't go near the quality demanding NLE operator.

I think some preview compromises are made with Vegas to satisfy the general cases and not the specific ones. Top end CPU,RAM,I/O probably helps you get the same results from all but the draft settings. My "Best" preview - well it is fine for within the NLE, but I wouldn't bother to record it (1.8GHz Northwood, PC940 RDRAM, 46MB/sec SDTR on single drive video HD).

Premiere does do excellent DV integration. Yet it soon takes a tumble when you get creative and the preview rendering gets in the way of this activity IMHO. Vegas is consistent to the number of layers I've ventured into. YMMV.
JackHughs wrote on 3/7/2003, 10:22 AM
OK, I'll try again.

Check your Hardware Abstraction Layer (HAL). Is it set for Automatic Configuration Power Interface (ACPI) or Standard Computer? If it is set for ACPI, you may want to do a complete reinstall of XP and set HAL to Standard Computer.

There are a number of excellent articles available describing problems related to ACPI and the proper means to diagnose and resolve those problems. Go to Google and punch in "Windows XP ACPI".

JackHughs
Rosebud wrote on 3/9/2003, 3:05 AM
I made a complete reinstall of XP and set HAL to Standard Computer... unfortunately i get the same issue :((
With Win2K and ACPI enable, i get smoothly playback.
So, I will go back to Win2K... dont benefit from Hyper-Threading, but get smoothly playback.
rextilleon wrote on 3/9/2003, 7:44 AM
I didn't know that Premiere allowed you to preview through an external monitor---What is the configuration of your computer----I mean processor, drives, etc---Sonic makes it very clear that performance through an external monitor is largely dependent on your hardware.
JohnnyRoy wrote on 3/9/2003, 9:19 AM
Have you tried the fix in the Preview window is choppy in Vegas 4 (11.43fps) thread? It involves an SBLive card and adjusting Playback Buffering in the Audio Device tab. It fixed the jerky playback for me.

~jr
Victor wrote on 3/11/2003, 3:29 AM
to all - A lot of thanks for replies!

to zcus - My firewire card is set on PCI2 slot. In order: AGP, PCI1 - empty, PCI2 - firewire card. Also I removed sbcreative card and try out without sound card. Still have jerky preview.

rextilleon wrote: "I didn't know that Premiere allowed you to preview through an external monitor---What is the configuration of your computer----I mean processor, drives, etc---Sonic makes it very clear that performance through an external monitor is largely dependent on your hardware."

PIII 800, 512 ram, 40 gb 7200 rpm

to JohnnyRoy - Yes, I try to set Playback Buffering in the Audio Device tab to 0,4 but nothing.

Any suggestion?
pb wrote on 3/11/2003, 6:43 AM
Never tried Premiere 6.5 but still use the older versions for some applications.

Premiere 6.0 running on a machine using only a 1394 card allows the user to view the timeline through an external monitor and will play to tape from the timeline without rendering.

However, Premiere 6.0/1394 does not preview effects (not even dissolves) so you must render in order to see the results. Not sure if they did anything about the audio editor in 6.5 but it is pretty feeble in 5.1 and 6.0. Premiere also crashes; I have yet to crash Vegas Pro, Vegas 2, Vegas 3 or 4. Guess it's a trade off between avoiding rendering in order to print to tape or being able to do your work efficiently.

Peter
Dills wrote on 3/11/2003, 5:42 PM
I was having the same problem, but I found out my mistake was using clips captured with Scenalyzer using the Canopus codec...which meant that Vegas needed to render EVERYTHING in order to play smoothly...once I started using the AVI2 setting when I captured, it worked great on a P3 dual 800 system. Probably you don't have this problem, but I did a search on this forum and the COW forum for this problem and found a post which helped me walk through all the possible problems and found mine. There are a multitude of things to make sure you've done, sometimes it's a simple thing you overlooked, sometimes not. When all else fails, take everything out of the computer you don't need, remove all the software you don't need to edit, and start from there.