I use both VirtualDub and AVI I_O to capture. I prefer to use VirtualDub ONLY because AVI I_O has a 4 Gig limit. The problem is VirtualDub is dropping frames-
My setup:
P4 1.4
Abit TH-7 RAID
384 RAM
20 Gig Drive for System -FAT32
40 Gig for capture (2/ 20 Gig 7200rpm 100ATA- RAID 0)-NTFS
Matrox G450eTV
W2k
Hardware all tests out good.
I would really like to get around using VirtualDub. Does anyone know how to get around the AVI I_O 4 Gig limitation?
Please help.
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Looks like you are running a fairly powerfull PC there so u should be able to capture with minimal frame drops. I have found that the following can help:
remove any memory resident programs from the startup tray e.g. MSN Messenger. This type of app seems to poll the system frequently and can really impact on something like vdub that needs dedicated system resouces.
Use the MJPEG codec at a quality setting of 19. This codec allowed me to boost my capture res to 704x576 when others would drop frames at much lower resolutions e.g. 480x576.
Check that your source material isnt the problem I sometimes find that a short passage of footage will always generate frame drops no matter how many times u try to re-capture it. I assume that this is down to contrast levels etc.
make sure you turn "overlay" off when performing a capture. This not only saves on resource but will allow you to capture in resolutions that are unavailable to you when overlay is switched on.
One area I am unsure of is W2k - perhaps someone else can advise you in that area. I use 98se and am able to capture trouble free on an AMD700 with 128k of mem.
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Sorry Dano - just realised u actually dont want to use vdub so my reply wont help u much.
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remove any memory resident programs from the startup tray e.g. MSN Messenger.
Use the MJPEG codec at a quality setting of 19. This codec allowed me to boost my capture res to 704x576 when others would drop frames at much lower resolutions e.g. 480x576.
Check that your source material isnt the problem
</BLOCKQUOTE></FONT></TD></TR><TR><TD><HR size=1 color=black></TD></TR></TABLE>
*TSRs are all turned off- Even Anti-virus software
*I use the MJPEG codec and actually have it at 20.
*Source is DVD (SVideo in)- Macrovision disabled
-I'll try overlay off.-
I really want to be able to get VirtualDub to work. I want to surpass the 4 Gig limitation on the app.
Thanks
_________________
=Dano=
<font size=-1>[ This Message was edited by: Dano on 2001-12-19 09:18:36 ]</font>
<font size=-1>[ This Message was edited by: Dano on 2001-12-19 09:33:48 ]</font> -
how high a res are you capturing at?
I can capture at 640x480 using picvideo mjpeg with no loss of frames with about the same speed puter. Make sure your capture card is not sharing an interupt with any other device as this will cause alot of dropped frames. -
Interrupts are controls 100% by Windows 2K- no control over that. It is Shared by 3 resources- But I was told this is normal and OK. Capture works fine in AVI I_O. That's why I can't understand what the problem could be.
_________________
=Dano=
<font size=-1>[ This Message was edited by: Dano on 2001-12-19 11:55:21 ]</font> -
Here's something that really helped VirtualDub on my system:
Under the Capture menu, choose "Disk I/O...". Increase the Chunk Size to 4 MB or more. The number of "chunks in buffer" should be at least 2, but I get better results with 4.
This change nearly quadrupled my system's capture bandwidth, so I'd like to see if it helps anyone else.
If this doesn't help, try turning DOWN your capture settings just as an experiment. If VirtualDub still drops frames at really low settings, there might be some other problem.
-tacosalad -
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On 2001-12-19 12:15:57, tacosalad wrote:
If this doesn't help, try turning DOWN your capture settings just as an experiment. If VirtualDub still drops frames at really low settings, there might be some other problem.
-tacosalad
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Chuck size had no affect. What do you mean, turn DOWN my settings, Capture size? What exactly am I turning down?
_________________
=Dano=
<font size=-1>[ This Message was edited by: Dano on 2001-12-19 17:20:55 ]</font> -
Lower your resolution and /or framerate as a test. also, try capturing w/o sound. I have similar system, no raid and XP, frame drops not a problem. AVI_IO should use segmented files to beat the 4 gig limit, VDUB made 30 gig AVI just fine on my system.
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Sorry Dano, I was pretty vague.
Nelson37 got it right: try a lower resolution for one test, then a lower framerate for another.
Capturing without audio is an important test I'd forgotten. To do that, uncheck the "Capture audio" box in the Settings dialog under the Capture menu. This helps determine if your sound card is hogging the computer. (SB Live users have complained about this.)
These tests won't necessarily lead straight to a solution, but they help diagnose the problem.
-tacosalad
PS: Nelson37 is also right about AVI_IO. It should split captures bigger than 4 gig into multiple files, which you can join together afterward. -
Go to Capture->Settings and change the Video Buffer Limit to 50. This should have allievate frame dropping problems. To avoid the 4 gb limit, use either NTFS or you can capture with VirtualDub using segments. In the Capture menu, select Enable Multisegment Capture. Also in the same menu, go to Capture Drives. Click Add Spill Drive. The path is where you are capturing to. Threshold should be 50 mb and priority to 0. Try not to create AVI files smaller than 50 and larger than 1900
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I want to thank you all for your input. I will try these when I can. I have been through testing and using another sound card as the Abit TH-7 has onboard sound. The funny thing is that it doesn't seem to be a problem using AVI I_0. I also think that VirualDub may be buggy. I understand that it was written in VB.
Tracker, I am using NTFS (drives set up for RAID 0).Regarding AVI I_0: How much of a delay can I expect when splitting? I want to obviously make it as seemless as possible.
Thanks again-
=Dano= -
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On 2001-12-19 05:34:37, Dano wrote:
I use both VirtualDub and AVI I_O to capture. I prefer to use VirtualDub ONLY because AVI I_O has a 4 Gig limit.
</BLOCKQUOTE></FONT></TD></TR><TR><TD><HR size=1 color=black></TD></TR></TABLE>
AVI_IO has a 400gb limit in theory according to website. I have bought avi_io and it is great can capture nearly 2 hours of avi format before i get disk full message using twin 40 gig hard drives using 64 gigs for capturing it may cost $50 where i come from but it is worth it -
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On 2001-12-20 05:19:49, ^^^^###@###^^^^ wrote:
AVI_IO has a 400gb limit in theory according to website. I have bought avi_io and it is great can capture nearly 2 hours of avi format before i get disk full message using twin 40 gig hard drives using 64 gigs for capturing it may cost $50 where i come from but it is worth it
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Here is an excerpt from AVI_IO's site:
"Maximum Filesize in MB
Here you define the maximum file size of each avi file created by AVI_IO. NOTE! The maximum of the fully enabled version is 4GB and AVI_IO WILL in all cases create a valid avi file of that size. However, if the video software you are using is not capable of dealing with files of that size, then it may tell you that the files are invalid which is the standard behavior in such cases. However, AVI_IO's player part will play back such files without any problems."
I am assuming that the 400Gigs it a merge of multiple AVIs ?
Are you able to capture 1 AVI larger than 4 Gigs? -
Yes, the "400 gig" spec refers to multiple avi's. I don't think you can create a single AVI over 4 gig, but I admit I haven't actually tried it myself. In fact, I usually set the limit at 2 gigs per file because some of my video editing software barfs on files any bigger than that.
The good news is that there is no gap between files that AVI_IO captures; they form a huge, seamless video when you merge them together. The free-trial edition only lets you capture three segments at a time, but that's adequate to test whether the program satisfies your needs.
It's hard to predict which program will work best on a particular set-up, so I don't blame VirtualDub if it doesn't work. I got best results from AVI_IO with my old setup, but it is strangely brittle with my new computer, with two-thirds of my captures simply aborting with a "buffer overflow" error after a few seconds. In contrast, VirtualDub was cranky and unpredictable for capturing on my old setup, but it works like a champ on the new one.
-tacosalad -
I have matrox marvel 450 and w2k too. I had problem
with capturing at VDub (dropped frame)too . Solution
is next - in Capture / Disk I/O / must unchecked
checkbox Disable Windows write buffering - when this
buffer is off (checked checkbox)- VDub make drop frames
during capture.
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VDub was dropping frames like crazy so I bought AVI_IO.
AVI_IO is the superior product where segmented captures are
concerned; rarely drops frames at all. AVI_IO only does
a few things but does them much better than VDub does IMO.
vcddude -
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On 2001-12-20 11:41:50, vhucko wrote:
I have matrox marvel 450 and w2k too. I had problem
with capturing at VDub (dropped frame)too . Solution
is next - in Capture / Disk I/O / must unchecked
checkbox Disable Windows write buffering - when this
buffer is off (checked checkbox)- VDub make drop frames
during capture.
</BLOCKQUOTE></FONT></TD></TR><TR><TD><HR size=1 color=black></TD></TR></TABLE>
Vhucko,
I think you got it!
Seems to be working. Sometimes the first frame drops-
But I think that worked!
Thanks to all for your input!
Later
_________________
=Dano=
<font size=-1>[ This Message was edited by: Dano on 2001-12-20 17:43:05 ]</font>
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