IRQs and DMA??? Capture problems

Corey1 wrote on 7/31/2004, 8:18 PM
When i capture video and play it back the audio is choppy and there are many dropped clips in the video.... this isn't only in Vegas. It also happens with Adobe Premiere. BUT!!! the audio and video are fine with Windows Movie Maker, but i don't want to use that for capturing. Anyone have an idea of whats wrong?

excuse me, sorry it doesn't tell me there are dropped frames... it has before... but i can capture without dropped frames but the audio is extremely chopped and distorted and the video flickers.

Comments

Spot|DSE wrote on 7/31/2004, 8:54 PM
Drive defragged? In DMA mode? Preview screen size/resolution quality set to anything but Preview/Auto or Preview/Full? What's going on in the background while you're running Vegas?
Do the captured clips have dropped frames that Vegas tells you about after capture? Or do they capture fine but don't playback fine?
A little more info will go a long way.
Corey1 wrote on 8/2/2004, 6:38 PM
Yes it tells me about dropped frames after capture. The preview is on Auto.
what is DMA?
Flack wrote on 8/2/2004, 8:35 PM
Are you capturing to the same drive that your OS is installed on ?. DMA is a setting to enhance the performance of your drive, you have to go in to the Device manager and check it in there.


Flack
Corey1 wrote on 8/3/2004, 12:53 PM
Where in Device manager is DMA? and some more info... im using Firewire, i defragged last night no help, and some people are telling me that there are IRQs but don't tell me how to fix it? do yall know?
frankhou77 wrote on 8/3/2004, 1:24 PM
I was using Vega 4.0 for many months without any problems, now we have upgraded to Vega 5.0, we got the upgrade about 6 weeks to go, but this week I desided to give it a try.

When I upgraded to Vega 5.0, I started to have dropped frames like crazy, it was driving me nuts, upgraded the version to 5.0b and still the same thing.

I have tried just about everything to get around it, I have found a temporary solution, I have disabled the "Preview" and am using the screen on the camera to view the video that I am capturing.

That has stoped the frames from dropping to 0....

This might be something that you want to try.... I had also tried everything you had tried with no sucess.
B.Verlik wrote on 8/3/2004, 1:27 PM
It took me a while to remember this. Go to your 'Start' button and then go to the 'Settings' tab. Then go to 'Control Panel' then go to 'System'. This will bring up 'System Properties'. Click on the 'Device Manager' tab and then find your DVD drive. (probably listed as CD-ROM). Right click on your DVD drive and then you'll see 'Properties' at the bottom of list. Go to 'Settings' tab and then you'll see a square about 1/2 way down, that says DMA. Put a checkmark in square and that's it. Also, there's not enough info on what you were doing to transfer video into your computer. Sound always sounds choppy, while putting into computer. But sounds fine, once loaded in. I always get dropped frames if I'm loading in old VHS tapes, but never lose a frame when loading in DV, via 1394. I can't tell you anything about IRQs.
Corey1 wrote on 8/3/2004, 1:32 PM
i disabled the preview and tried some stuff. I captured some video and dropped it into my media bin. I go to the timeline and drop the capture on it, it still plays distorted. If i delete the video the audio seems ok, but if i only delete audio and keep video the video is still kind of skippy. If i play the video from my camera and do not record, it plays perfect. this problem only happens when i record. the audio sounds like it is only being captured every other frame along with the video.
B.Verlik wrote on 8/3/2004, 1:36 PM
PS: try to get a lot more than the 256 RAM they require. I went up to 768 RAM and now my playback, in the Vegas window will play at 29.97 fps. (unless I have lots of effects and edits)
Corey1 wrote on 8/3/2004, 1:40 PM
i go to "System" under control panel and there is a "hardware" tab that has device manager in it. I have two DVD drives, a burner and player. When i right click either of them it brings up properties for it. There are 5 tabs..." General, Properties, DVD Region, volumes, and Driver" None of these have anything with DMA to click.... I am using 1394 to capture. The capture sounds like music would if ur computer was slow and unable to play clearly. Could i need to download a new driver for my Firewire?
B.Verlik wrote on 8/3/2004, 1:50 PM
Well, that really throws me off, that you don't have that 'Settings' tab in your DVD device properties. Did you check with both your drives? Be sure that you're checking the DVD that records. (probably obvious) I'm sure there must be a DMA switch somewhere. My OS is older than XP, so it's probably different. Even without lots of RAM, you should be able to get a good enough Pic and sound. Other Drivers for your 1394 may help. But be sure that you find your DMA switch, because that's a must.
B.Verlik wrote on 8/3/2004, 1:54 PM
I suggest you post a new question and ask if anyone can tell you how to enable your DMA for your OS (ie: XP, 98, etc.)
MyST wrote on 8/3/2004, 1:57 PM
Forgive my ignorance, but what does his DVD burner have to do with him dropping frames when capturing?
I can't see DMA available for my DVD drive either.
It's there for my hard-drives, and checked.

Just curious
Mario
B.Verlik wrote on 8/3/2004, 2:18 PM
Forgive my ignorance, but what does his DVD burner have to do with him dropping frames when capturing?
I can't see DMA available for my DVD drive either.
It's there for my hard-drives, and checked.


I have the dreaded 'Windows ME' , so of course it doesn't make sense. But that's where my switch is.
johnmeyer wrote on 8/3/2004, 2:30 PM
There is no DMA setting for 1394 (Firewire) drives. It is only for internal IDE drives.

Dropped frames on 1394 drives can be caused by the type of Firewire hard drive you have. I had all sorts of problems with a Western Digital drive until I sent it back to the factory and had it refurbished. Western Digital took it back with no questions asked, even though I wasn't the original owner and it was out of warranty. I think they were generous, because they knew they had a problem. No dropped frames since it came back.

You might also benefit from a Firewire patch designed to fix various problems with the Windows driver. See this thread:

Firewire 1394 Solutions
Corey1 wrote on 8/3/2004, 2:56 PM
Possible different problem... I opened an old project to play in Vegas to see if it ran fine, it was somewhat distorted at times... if i play video from my camera in the preview (not capturing yet) from off the miniDV tape, it runs fine... but if i try to capture it, it isn't. When i play CD's and open other programs, the CD skips alittle. Is there some program maybe that is running that is causing me not to get the best capture and audio too maybe?

I did have my pc serviced a week ago for a windows problem and they reloaded windows i believe. Could something they have done be at fault for this?
MyST wrote on 8/3/2004, 3:05 PM
How "clean" do you keep your PC?
Do you delete your temporary internet files, do you defrag before a capture, anti-virus auto-protect on, e-mail auto check set for 5 minutes, screensaver on, etc?
Do you do anything on the PC while capturing?

Maybe if you described all your steps/settings someone could nail it down for you.

Mario
B.Verlik wrote on 8/3/2004, 3:08 PM
I know, when I first signed up to be in this forum, about 2 weeks ago, I saw where somebody said that you can't install XP on top of Vegas without problems. I don't remember anything else about that. But you may need to Un-install Vegas and then re-install it.