virtualdub file sizes?

[DaveS]

I have a 36 gig file (a little short of 3 hours) that I am running through some vdub filters...I saved this as an AVI so that the filters could be applied, and my output was over 60 gig when my drive filled up...the output was uncompressed (RGB) which I would assume would be the same size as my input file, but I was obviously not correct in this assumption...is there something obvious I am missing as to why the file size is larger than the input? Just to see the results, I am saving as pegasus picvideo, but I'd prefer to save as raw AVI and then encode (b/c I am still trying to figure out the vdub frameserve protocol). TIA for any suggestions!

[BJ_M]

sounds as if the source was compressed .... maybe huffyuv , which you may want to use anyway if you dont frame serve ..

[Baldrick]

is the source uncompressed? then it should be the same...if you don't upresize or change any audio settings. or use huffyuv.

frameserve guide
www.videohelp.com/virtualdubframeserve

[DaveS]

it should have been uncompressed AVI (output was from Vegas 5.0 as AVI, so standard 5:1 'consumer' DV is what I have)...vdub needed the panasonic DV codec to open the file..gspot shows the 4cc code (I need to learn what that is) as dvsd..it's a bit odd...the only thing I was thinking was whether vdub was saving the audio as a wav file(?) but that's a longshot...I don't know..it's weird

thanks for the frameserve guide - now I get it & will try

[MpegEncoder]

At ~12 G per hour, it definitley sounds like DV-AVI. Which is 5:1 compressed. Uncompressed output will definitley be HUGE.

Why don't you encode it back to DV-AVI?

[DaveS]

@MpegEncoder - yup, 13 gig/hour ... and yes that what I'd like to do..I did a 'save as AVI' which I would assume will apply my filters and save that filtered video (& audio) into an AVI w/ the new specified name..should be exact same size as the original..so, I'm not sure why the file got so big...maybe there's something obvious that I'm just missing b/c vdub is new to me and everyone else is very used to it..not sure..

edit: and, if I could use those same plugins in vegas it would save me a step, but I think I'd have to find the avisynth plugins and try to get them into vegas (I foget)..but that's probably a different thread!, and I might as well use vdub

[BJ_M]

why do people keep saying DV is "uncompressed" avi ?

[DaveS]

I don't know, but that seems to be what people call it, although there's no reason why, really.

[MpegEncoder]

@MpegEncoder - yup, 13 gig/hour ... and yes that what I'd like to do..I did a 'save as AVI' which I would assume will apply my filters and save that filtered video (& audio) into an AVI w/ the new specified name..should be exact same size as the original..so, I'm not sure why the file got so big...maybe there's something obvious that I'm just missing b/c vdub is new to me and everyone else is very used to it..not sure..

The default for AVI output for VirtualDub is uncompressed. You have to select the compression codec yourself.

[MpegEncoder]

why do people keep saying DV is "uncompressed" avi ?

It really gets annoying sometimes, because it really confuses the newbies. For crying out loud, it's 5:1. That means that the file is 20% of it's original uncompressed size. That's pretty significant.

[gadgetguy]

..vdub needed the panasonic DV codec to open the file.

In order to maintain the same approximate size you would have to use the same codec. Since the Panasonic DV codec was required to open it, if you want to keep it the same size you should use the same codec to re-encode it with your filters applied.

[DaveS]

why do people keep saying DV is "uncompressed" avi ?

It really gets annoying sometimes, because it really confuses the newbies. For crying out loud, it's 5:1. That means that the file is 20% of it's original uncompressed size. That's pretty significant.

yes, sorry..good point,
and,

thanks on the above

[reboot]

Defintely figure out the frameserving in virtualdub.
There's a good guide on it here https://www.videohelp.com/guides.php?link=99

[DaveS]

Defintely figure out the frameserving in virtualdub.
There's a good guide on it here https://www.videohelp.com/guides.php?link=99

yes thanks I will...I'll give it a shot over the weekend since I think I need to rerun my filters as they were a little too strong..might as well try the frameserve at the same time ... I think the vdub on my machine is more IO intensive than CPU intesive..CPU never peaked at more than 60% even when I set priority to its highest, which means I have some cycles left for encoding ... my source file was on one physical drive and my destination on a separate physical drive, neither of which was my system drive..I got about 15 fps throughput on 2 filters (36 gigs processed in about 5.5 hours - not exact) (DNR and static noise reduction) on a 2ghz p4..anyway, for frameserve, it was just a question (so far) of learning that the first dialogue is the source file and rename the second file in the dialogue w a .avi as that is the signpost file (it wasn't obvious from the dialogues but I think that's what it is)...thanks again to all!