FORUMS: list search recent posts

Using VirtualDub to Capture with Intensity Pro?

COW Forums : Blackmagic Design

<< PREVIOUS   •   VIEW ALL   •   PRINT   •   NEXT >>
Troy Davis
Using VirtualDub to Capture with Intensity Pro?
on Apr 23, 2011 at 3:20:14 am

I am trying to get VirtualDub set up to capture and record my Intensity, but I ran into some problems.
I get the overlay working (it displays what is going through the capture card), but as soon as I hit start capturing, the framerate of the overlay drops to a dreadful framerate and likewise, the recorded video is choppy as well.
I'm talking 1-2 fps.
In the "set custom format" menu under the Video tab, I see the option for MJPG capture. Which, as I recall, fixed this issue for Media Express. But, when I click it, it says my device doesn't support MJPG.
Help.


Return to posts index

Dale Mullins
Re: Using VirtualDub to Capture with Intensity Pro?
on Apr 23, 2011 at 6:38:07 am

Troy,

Take a look at these two threads on the VirtualDub forums. I'm using VirtualDub (32-bit), Huffyuv (version in the first thread), and capturing at 720p.

http://forums.virtualdub.org/index.php?act=ST&f=6&t=16116

http://forums.virtualdub.org/index.php?act=ST&f=6&t=18587

Dale


Return to posts index

Troy Davis
Re: Using VirtualDub to Capture with Intensity Pro?
on Apr 23, 2011 at 5:57:29 pm

Thanks, but Huffy didn't fix anything. It still has massive input lag on both the display (which I'm trying to play the game from) and in the recorded video. It's not my computer either. Well, I would hope not.
i7 920 @ 4GHz
6gb DDR3 1600 @C7
GTX 470
Windows 7 x64

EDIT - It's not "input lag" as I stated here. It's a complete drop in framerate. As soon as I hit "capture video" both the VirtualDub display and the recorded video can't muster 5fps.


Return to posts index


Dale Mullins
Re: Using VirtualDub to Capture with Intensity Pro?
on Apr 24, 2011 at 1:14:12 am

Troy,

What resolution are you attempting to capture (720p? 1080i?)?

What type of storage/hard drive system are you saving to (IDE? SATA? RAID-5?)?

What are the results (post a screen shot) of your Blackmagic Disk Speed Test? To run this app, at least on my computer, it is located in the Start menu under Blackmagic Design -> Intensity group.

When you start the capture, what are the stats displayed in VirtualDub (CPU usage, Video -> average rate, data rate, compression rate, ..)?

Dale


Return to posts index

Robin Kassim
Re: Using VirtualDub to Capture with Intensity Pro?
on Apr 24, 2011 at 3:45:53 am

Click the video menu drop down in VirtualDub and select Preview (or just press 'P' in the capture mode). Then when you capture, press F6 to use the normal capture mode (F5 or selecting capture from the drop down menu will use compatibility capture mode).

This should fix frame drops during capture preview.


Return to posts index

Troy Davis
Re: Using VirtualDub to Capture with Intensity Pro?
on Apr 24, 2011 at 4:55:04 am

720p
WD Caviar Black and Green are used.
Here is the result from the Caviar Green (since it's the one I mostly use for video storage)
http://s988.photobucket.com/albums/af9/RathionT/?action=view¤t=Captur...
And what VirtualDub says while I'm recording. This is with the Huffy compression, by the way. Which does work better than the BM one in VirtualDub, as far as framerate goes.
http://s988.photobucket.com/albums/af9/RathionT/?action=view¤t=Captur...

@Robin
Nope; didn't help. :(


Return to posts index


Dale Mullins
Re: Using VirtualDub to Capture with Intensity Pro?
on Apr 24, 2011 at 1:53:29 pm

Troy,

Unfortunately, I believe there are two bottlenecks. Below are my images. See the thread mentioned above at VirtualDub.org for my hardware config. Two items that jump out at me on your images: disk write speed and CPU usage. I'm no expert, so maybe someone more experienced can chime in here to confirm or clarify.

Looking at the 8 Bit YUV -> HDTV 720 fps -> Disk Write: I believe this needs to be quite a bit higher. Assuming you were capturing uncompressed 720p, this should be at LEAST 60 - but that would be borderline. You are compressing, so you could probably get by with a little less - but not much.

At the CPU usage: You are showing 97%, so you are pretty much maxed out.

Good luck,
Dale

http://www.overshield.com/images/vdub/blackmagic-disk-speed-test.jpg


http://www.overshield.com/images/vdub/vdub-capture-status.jpg


Dale


Return to posts index

Troy Davis
Re: Using VirtualDub to Capture with Intensity Pro?
on Apr 24, 2011 at 3:47:08 pm

Hmmm
Well, I've always wanted to try out RAID. Better time then ever, I suppose. :P
Thanks for the help.
I don't know why my CPU is struggling with this. Unless the multithreaded Huffy didn't install correctly or something and it's just using the "normal" Huffy.


Return to posts index

Dale Mullins
Re: Using VirtualDub to Capture with Intensity Pro?
on Apr 24, 2011 at 10:37:06 pm

Also, for what it's worth, I am using RAID-5 (three drives configured RAID-5 via Windows XP). I know hardware RAID is supposed to give the best performance, but using the Windows "software" RAID appears to work just fine for me.


Return to posts index


Robin Kassim
Re: Using VirtualDub to Capture with Intensity Pro?
on May 4, 2011 at 3:25:54 am

What verion of VirtualDub are you using? Using preview and F6 capture mode fixes all choppy preview on capture for me.

Windows software raid also worked fine for me.

However, I have 3x WD30EZRS drives and they can capture 720p60 8bit uncompressed without dropping any frames if you are willing to put out some cash and don't want to deal with RAID.


Return to posts index

<< PREVIOUS   •   VIEW ALL   •   PRINT   •   NEXT >>
© 2017 CreativeCOW.net All Rights Reserved
[TOP]