Hi Marty,
I hadn't thought of trying that. The System monitor did not show a conflict, but I moved it to a different slot anyway. Unfortunately it didn't help, no change.The 1394 adapter is on the system board, the only pci card is the modem card and that is what I moved. The remaining card is the AGP graphics card, a Matrox g450 with dual monitors same as the slower machine. I'm running Win2k on both machines.
Any other thoughts?
Warren

Hi Warren,

Make a search with « JERKY » in this forum and your will find some peoples who have this problem (like me) :
http://www.sonicfoundry.com/forums/ShowMessage.asp?ForumID=4&MessageID=165241
http://www.sonicfoundry.com/forums/ShowMessage.asp?ForumID=4&MessageID=164615
http://www.sonicfoundry.com/forums/ShowMessage.asp?ForumID=4&MessageID=164606

At this time SoFo dont found any solution (i received many mail from SoFo).

Hi Warren,

I don't have W2K, but I believe sharing does not always report conflicts, but can interfere with playback.

Another issue to explore is usb usage... USB is known to poll the system constantly, not just on device demand.




HTH, MPH

Tips:
http://www.martyhedler.com/homepage/Vegas_Tutorials.html

Recheck the drive assignments in your options and preferences and capture options
menus. There also have been some issues with built in USB ports on the motherboard.
Make sure the temp files are still on the "C" drive as if you assign this to another
drive it will access that drive incessantly even when nothing is happenning. I tried
it im mine and thats what happened.

JJK

Thanks to all for your suggestions, but no help.
However, I think I have come up with a clue, though I don't know quite what to do with it.
To recap I have two PCs running Vegas4 and VV3. One is older, and runs both versions with no problems. The newer,faster PC has problems that show up when previewing to the external monitor in both V4 and VV3. Out of curiosity I ran the cpu monitor on both systems. Here's what I found..........

When running Internal preview, both m/cs have about 25% cpu usage, and V4 shows 25%
usage. When I switched back to internal preview, the old (good) machine went down to about 5% cpu and 2% V4 and stayed constant. On the new PC it is a different story.

The new PC stayed at 25% and then started to climb to 100% Cpu usage and Vegas4.exe stayed at 25% and then went up to 95% OVER TIME, about 5 minutes.

This is a major difference, but I don't know what it means. It can't be right.

Any ideas. Can SoFo jump in on this one?

Warren

Hi JJK,
I'm confused, I thought the temp files were to be on a drive other than the OS, no?
TIA,
Randy

Temp files yes, Temp preview files no, Capture files no. The "C" temp files
in the documents ---Don't know what they do.

JJK

I eagerly pray for a response from SoFo on this as I too have this issue (jerky playback on external monitor). The most cited response is to disable virus scan, which I do before starting Vegas, but this doesn't resolve the problem for me.

I am experiencing this on two separate XP machines, one an XP Pro machine with a pair of 2.2 Xeons, a 15k RPM system drive and separate 10k RPM video drives, and the same problem on a somewhat ordinary computer at home, an XP Home equipped HP w/1.8 Ghz P4, a 30-gig EIDE system drive, plus an external 1394 video drive.

Nothing I do resolves this problem and I am at wits end.

Have this problem ,have always had this problem , if I want to see a section without any jumps, I render, print to tape loop area , and get the real view,, not too much trouble ,but sure wish I could just play the #$%^ thing. Heard everything from Via chipsets to graphic cards, cheap firewire cards , etc,etc,etc.I do not have this problem with other programs-- so my conclusion is............

JJK said: >Temp files yes, Temp preview files no, Capture files no. The "C" temp files in the documents ---Don't know what they do.<

I try to live by the motto: "It is best to remain silent and thought a fool than to speak up and remove all doubt" but here I go again...I've captured and kept all of my files in a folder named "VV3 temp folder" on my "D" drive until ready to PTP since VV3. I also have a folder named "VV3 perrendered files" there along with VV3 audio (there never seems to be anything in them though). I did this 9 months ago for who knows what reason but please tell me if this is not the best way to do it. I come from an audio NLE background (Cakewalk Pro Audio 9 thru Sonar 2) where one would never keep the files on the "C" drive.
Thanks for your patience JJK,
Randy

I was having a similar prob after doing a print to tape. subsequent playback from timeline was jerky. DSE mentioned that having your computer monitor playback window sized smaller than 320x forced the external monitor into a draft playback mode. I resized the window and my playback to external is now smooth. Hope this helps.
John murphy

I always assign the prerender, render, capture files to a drive other than "C"
as my machine is only 1 gig. The default setting of "C" documents\temp for
Vegas temp files (not video temp files) is OK and even the sound files
can be on the "C" drive. With the newer faster computers this is not supposed
to be a big problem unless the ACPI piles up all the IRQ's on one IRQ. Some
people have problems and some don't even with the IRQS all sharring. With my
computers if I capture or render to "C" I have big problems. And my IRQS don't
share with the video card or the sound card. My TV monitor connects through the
Canopus ADVC 100 and with normal timeline video it plays back smoothly unless
there is a transistion or FX then it jerks. If I want to see what is actually
happening I have to do a small loop then render to media player with FX or
transistion applied on the timeline. I would love to have a 3.06 gig CPU but
the time is not now. I use Direct x 9.0 and Media player 9.0 with V4.
SOFO says the preview window is CPU sensitive so I have to believe them.
I'm sorry that I can't offer you any more info but I would keep an open mind to
all of the issues such as type of CPU and type of Video card (Mine is ATI 7500 32meg.) The problem here is you have to rely on the people who have wrung out
the problems and not Microsoft. Microsoft technicians wonder why anybody is
using win2k for video as they want you to us XP. Check the previous threads
on this forum and the Cow forum which has some very heavy hitters.
http://www.creativecow.net
My preview window is set for 720 x 480 preview full. I fully expect that when I
upgrade to a 3.06 gig CPU that my eyeballs will not blink anymore.

JJK

Additionally,go to your tools and select system info, hardware, then IRQ's
and see which IRQ's are on what card. you want the video card on one IRQ, and
the 1394 buss on one IRQ and also the sound card on one IRQ. But then again
some people have no problems with this no matter what the IRQ's are doing
and I don't know why.

JJK

Thank you very much for your efforts JJK!
Okay, my primary monitor, 1394 and USB universal host controller are all on one IRQ. Logic and your suggestions tell me that at least the video card and the 1394 should be on separate IRQs. I haven't shifted around IRQs since my Win ME days (thank God those days are gone). Can you or someone tell me how to do this in XP Pro por favor? I've 2 other posts running here and I'm hoping all my problems are related to this IRQ issue.
Thanks again JJK,
Randy

Hi all
It seems that there is a large element of chance as to whether preview to an external monitor works smoothly or not. Since I began this thread I have tried several things, including getting the 1394 interface to have an unshared interupt, trying another hard drive for the video, having the drive as the secondary of IDE 1,putting another hard drive as the primary on IDE2 (IBM Deskstar)
I have also tried all the different quality settings for preview.

The preview is still jerky

The only thing that is still consistent is monitoring CPU usage that shows a gradual increase from about 5% to about 97/98% over several minutes while looping a clip on the timeline during preview to an external monitor.
I have not yet figured out why

Is it possible that certain MBO's are responsible for this?

Mine is an ASUS P4PE with on board audio,1394,LAN,and Raid(not used)

Is it possible to do an informal survey as to what boards are being used by those having trouble?

Warren

I am not very familiar with XP having only played with it once. I would
just try for the heck of it to see what card is in the first PCI slot and
the last PCI slot as these are "partnered" with the AGP video card slot.
A network card in these slots usually does no harm but the 1394 buss and the video
card is a potential problem. The new APCI mode from microsoft replaces the APM
mode (Power control) and with a new mother board the APCI is installed and what
this does is stack up all the IRQ's on one. I would just try pulling some cards and changing slots one at a time then check to see how the IRQ's configured.
If possible avoid the top slot and the bottom slot. You might get real lucky and get
that 1394 buss off the video card. The motherboard also has IRQ assignment controls
in the CMOS that are usually left in auto. Check first to see if you have an APCI setting that you can put to off. You also may have an ECSD setting in the
CMOS which must be set to manual before the IRQs can be set to lets say
9, 10, or 11 which are the favorites of the Auto position. Your into some real
hairy stuff now so remember what you are doing. The APCI in XP will still
probably prevent manual IRQ assignment but its worth a try. If your 1394 firewire
is built into the motherboard you might have to purchase a firewire card to install
in your PCI slot, shut off the motherboard 1394 in the CMOS then jerk the card around
in the slots to get that buss off of the video card. I remember some threads a while
back where someone had to do this. If none of this works you have to reinstall
XP (and I'm not sure about this) and during the initial install press F5 to select
"APCI or "standard PC". Select Standard PC and this will enable you to set the IRQ's
without interference from XP but the CMOS still has to have APCI turned off and
also ECSD. The system you are on in the old computer is "APM" which Microsoft
does not show in the selection of F5. After installing the OS you will notice that
you have to push the off switch to turn off the computer. Bummer. The "Pinnacle
Boys" have to do this relentlesly because their stuff is so IRQ sensitive. I would
suggest that if you are a little "Queesy" about these operations to find some
guru high school kid who can do this stuff in his sleep. The only other way
in the beginning of this message is to jump into the registry but if you are
unfamiliar as I am with it don't mess. Someone out there might have an easier
way to make registry changes but I have been unable to find the IRQ controls in it.


Now you know why some people buy the box and plug it in.

JJK

Thanks JJK,
I've done IRQ shuffling before but it was long ago and in WinMe (or 98) so especially with ACPI I better try shuffling PCI cards around. In another thread Marty suggested I just buy a new dual AGP video card. Anyone have opinions on a Matrox G450 Dual Head 32MB DDR AGP Video Card for $68?
Thanks again,
Randy

I'm just not seeing this in V4. Playback to external monitor through my ADVC100 is refect (except for the occasional freeze from my 1394 drive)

Rob Mack

This IRQ thing seems to affect some systems but not others. ATI seems to have a bad rep for drivers and the motherboards have to have the latest drivers. Some ATI cards
will have video/audio sync problems and also adding sound clicks to the start of
your final render. I would try to maybe communicate with Earl Foote on the "COW"
forum as thats all he does is put together new machines for Vegas. I probably in your case would try to shut off the on board 1394 and insert a 1394 card so that you can at least try to change that IRQ. Gonna take some messing around.
Good luck.

JJK
PS---Forgot to mention make sure your 1394 buss is recognized as 1394 only and not
as a network device. Delete the network portion.

Already tried using another 1394 card, and shutting other devices down until I was able to get it on one IRQ unshared. Did not help
Warren

Well I'm out of ideas unless it is the video card or processor interacting
somehow.

JJK

Warren,

Here's a new idea. It may be wrong, but it doesn't have anything to do with interrupt sharing. I suspect that the problem of jerky preview on an external monitor may be due to a buffer underrun condition.

When the Vegas interface, including the preview window, is displayed on one monitor, the display chores are shared to a greater or lesser extent between the cpu and graphics card processor. Further the graphics card memory serves as a frame buffer.

I don't know for certain, but I suspect that diverting the preview to an external device (via firewire) places the entire preview burden on the cpu and requires the OS to build a frame buffer in ram to serve the firewire device. So, I think the jerky preview may result from the OS reserving an insufficient amount of ram for the preview frame buffer.

Perhaps someone with a working understanding of the external preview data stream could comment on this idea.

JackHughs