Help with Fast recompressing for Bait n' Switch

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Ari-chan
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Help with Fast recompressing for Bait n' Switch

Post by Ari-chan » Sun Jul 20, 2008 11:38 pm

I need some help. I'm so confused! I recently decided to try the old Bait and Switch technique for editing on Premiere. The one in A&E's Technical Guides where you make a lower quality .avi of your footage for editing only to switch it back with .avs later. I followed the guide but I don't think I did it quite right.

So here are the details:

I followed the guide and used the PICVideo M-JPEG 3 VfW Codec.

My frame rate is 29.970fps

My Script looks like this
mpeg2source("G:\Pita Ten 3.d2v")
ConvertToRGB32(interlaced=true)
SmoothDeinterlace(tff=true, doublerate=false)
ConvertToYV12()
Crop(8,0,-8,-0)
LanczosResize(640,480)
deen("a3d",4,12,14)
SSXSharpen(ssw=4,ssh=4,xthresh=255)
Warpsharp()
Tweak(cont=1.1,sat=1.5,bright=0.1)
ColorYUV(gain_u=11)

For what is supposed to be a fast recompress it took nearly 3 days and is 764 MB. So can anyone help me out? I don't think I can wait that long for footage. :cry:
Image
Image

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Phantasmagoriat
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Re: Help with Fast recompressing for Bait n' Switch

Post by Phantasmagoriat » Mon Jul 21, 2008 11:39 am

use that .avs script only in Premiere when rendering the final amv, but the Low Quality version doesn't need to look good; it just needs to be able to generate fast previews for editing, so it doesn't need to be filtered [which is what's slowing things down :amv:]. What matters is that the two versions of your footage are frame-by-frame the same, regardless of quality. The difference is that one is Low Quality [but has fast previews... and is really easy to edit with], and the other is High Quality [but is really slow for previewing/editing/rendering]

to make your Low Quality version, comment-out unneeded lines so they don't have any effect [with a #], and render it under some low quality settings with PICVideo's codec
mpeg2source("G:\Pita Ten 3.d2v")
#ConvertToRGB32(interlaced=true) <---probably don't need anyway
SmoothDeinterlace(tff=true, doublerate=false)
ConvertToYV12()
Crop(8,0,-8,-0)
LanczosResize(640,480)
#deen("a3d",4,12,14) <--- see below *
#SSXSharpen(ssw=4,ssh=4,xthresh=255)
#Warpsharp()
#Tweak(cont=1.1,sat=1.5,bright=0.1) <--- see last note **
#ColorYUV(gain_u=11) <--- see last note **
It still might take a couple hours, but much less than 3 days :P
[you might want to check out Vdubs Job Control, especially the feature that automatically turns off your computer after it's done rendering, which is excellent to have your computer render over night... then the next day just turn on your computer, and your files will be ready for you ;)]

Anyways, when your LQ version is ready, Edit your amv with it, and when you are done, you should be able to swap your LQ .avi file with the HQ .avs file in Premiere using the method outlined in the guide. [test if it works, before making your entire amv, and get comfortable switching back and forth between the LQ and HQ versions] Using this method, even slow computers can edit at lightning speed... unless you are doing a lot of effect-work.

*Just to mention, you might want to tone down deen(), warpsharp(), and tweak() so it's not overfiltered... and I would probably put ssxsharpen() after warpsharp().

**Also, it might be safest to do color adjustments during post-production, just in case your export settings don't allow for the new color range.
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Ari-chan
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Post by Ari-chan » Mon Jul 21, 2008 4:32 pm

Thank you oh so very much! I had a feeling it was the filters but I wasn't sure if I should take them off or not, since my origional footage looks like crap. Though If I get rid of ConvertToRGB32(interlaced=true) then VDMod just automatically closes out as soon as I save the changes. Also this is what my source footage and cleaned footage look like if that should mean anything.

Image

Image

Also with that last comment of yours. Do you mean to wait until after I'm done exporting my AMV out of Premiere? Also do I turn these settings back on once I start switching them out in premiere or should I wait until right before I export?

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Post by Phantasmagoriat » Mon Jul 21, 2008 6:39 pm

Ari-chan wrote:Thank you oh so very much! I had a feeling it was the filters but I wasn't sure if I should take them off or not, since my origional footage looks like crap.
no problem^^ yeah, some filters can slow things down a lot.
Though If I get rid of ConvertToRGB32(interlaced=true) then VDMod just automatically closes out as soon as I save the changes.
I'm not sure why that is, but I would guess it has something to do with SmoothDeinterlace(), which I've never used myself [I use TIVTC... but whatever works]

Yeah, looking at those pics, the heavyish filtering should be alright lol, especially in scenes where there's mostly blocks of color [ie. cell-shaded anime characters will look pretty good] but keep your eye out for scenes where detail will be lost ;)
Also with that last comment of yours. Do you mean to wait until after I'm done exporting my AMV out of Premiere?
Yes, personally I do a little bit of filtering after exporting my amv; One thing I find is it's easiest to control color corrections afterwards, because if you scale up the colors/levels beforehand, there's a chance Premiere could scale them back down when exporting... I guess it depends on your export settings, but I think it's safer to do afterwards.
Also do I turn these settings back on once I start switching them out in premiere or should I wait until right before I export?
until the switch is made, you will be using only the LQ.avi files, so just make sure your filters are re-enabled any time before making the switch from LQ.avi to HQ.avs. Just don't add/change any filters that alter the frame sequence [like your deinterlace method] because that's what's important in Bait and Switch-- that the two files are frame-by-frame the same.
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Post by Ari-chan » Tue Jul 22, 2008 12:43 am

Okay I think I understand now. Thank you so much for all your help again! :D

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Post by Phantasmagoriat » Tue Jul 22, 2008 5:48 pm

no problem
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