Can I open 2 copies of VirtualDub?

[KE]

Hi I am new here. VirtualDub is currently converting a movie. Can I open a second copy at the same time without crashing the first one.
I would just like to play around while I am waiting.
Thanks, KE.

[techz]

VDUB generally uses a lot of resources, and its not really advisable to open another VDUB at the same time, it slows down the process, i've tried it. :)

[KE]

Thanks for your quick replay. Great forum.

[Leak]

Originally posted by techz
VDUB generally uses a lot of resources, and its not really advisable to open another VDUB at the same time, it slows down the process, i've tried it. :)

Ummm... maybe so, but you still can do it without crashing the other instance.

I'm also just encoding a movie, running WinAmp, burning a DVD, reading mail and (obviously) browsing the web, and it hardly slows down VDubMod...

np: Autechre - 444 (Incunabula)

[techz]

@leak
are u sure either u have a great machine or somethings wrong, because even opening another app while vdub in encoding icnreases the esetimated time to completion

[Leak]

Originally posted by techz
@leak
are u sure either u have a great machine or somethings wrong, because even opening another app while vdub in encoding icnreases the esetimated time to completion

Sure it increases the time a bit, but I couldn't care less if it takes 6:00 or 6:10...

P4 2,4GHz w/ Hyperthreading, 512MB RAM, Windows 2000

np: Themselves - Thisboutthecitytoo (Urban Renewal Program comp.)

[begu]

With 'multiple' processors like hyperthreading in P4, which makes two virtual processors, it's faster to use two virtual dub processes simultaneously. In my tests, I have a P4 2.4C OC'd to 3.2G with dual channel DDR433, the fps of encoding behaves like this:

Both are with similar AVI file for input and with identical filter cahin.

one vdub: 16 fps average
two vdubs 11 fps average for both

So in the end, the summed fps is 22 for latter situation and therefore encoding is faster. One process of vdub can't fully use the power of hyperthreaded processor. I haven't tried the situation, if I turn off HT in the bios. Maybe I could then get 22 fps for one virtual dub process. Might try, but then if I want to do something else during encoding, I assume, the performance hit is deeper, when compared to HT turned on.

Some time ago I saw someone having two actual processors with hyperthreading, and then it was adviced to use four virtual dubs to achieve best performance!

[techz]

unfortunately i dont have a hyperthreading processor :(

[John2002]

I was just wondering the same thing. You can clearly have more than one VirtualDub running at the same time. But does it cause any undesirable effects to the videos you're encoding simultaneously? Sometimes programs use common temp files or common configurations with unpredictable results if you run more than one at a time.

In my case I want to encode Divx (which is CPU intensive) and also output an uncompressed file (which is disk intensive) so having 2 VirtualDubs going at the same time would save time.

[Suiryc]

You should be able to run multiple instances of VirtualDub(Mod).
Only 3 problems could occur:

1. (Maybe) If you use the same codec in some of those instances, and this codec doesn't allow it, then you are screwed.

2. (We never know, it's Windows after all) If your Windows have problems when multiple programs use some of its API (mainly VFW, ACM) at the same time. Then prepare to the worst :p

3. (For sure, but doesn't matter that much) Latest versions of VirtualDub(Mod) store a few settings (e.g. the fact you enqueued your last job in the Job List, etc) in the registry. So the stored settings will be the one of the instances which stored them last (so not necessarily the ones of the last opened instance).

[ftack]

I've got Virtual dub crashed upon previewing an AVS script. Suddenly I noticed I got another instance of VDub open. My problem was solved. Bottom line: open two Vdubs at your own risk ...

[Richard Berg]

When doing video work I have 3-5 VDub windows open most of the time. No different from running lots of IE windows when surfing.

[techz]

out of curiosity, pc specs??