16:9 footage questions, slowdowns and quality loss.

Scaledkittah · Post by **Scaledkittah** » Sat Aug 25, 2007 2:17 pm

Specifically last exile footage in this case.

Ran it thru Dgi with forced film on, so i have a 23.97 clip. Exported a small test clip using VDM with just AssumeFPS(24) and Lagarith to see what it'd look like. In terms of what kind of clean up would be needed.

But all the test clips compared to the VDM previews are running slooooow compared to the actual anime itself. And the quality loss compared to the clips in Dgi is horrible. Macroblocking, blurry lines (not interlacing, but skyline issues, much blurring where the shades of blue change) character halos, the works.

The image issues I think can be fixed with the cleanup scripts (hopefully) But does anyone have any advice to offer on what's causing the slowdowns, and how to fix it?

Tab. · Post by **Tab.** » Sat Aug 25, 2007 2:42 pm

Change your display colordepth to >16 BPP? <:|

Scaledkittah · Post by **Scaledkittah** » Sat Aug 25, 2007 11:43 pm

Never mind, seems lagarith was the culprit by lagging the footage. Though for the record upping the colordepth made things even slower.

When I export them out with huffyuv everything seems peachy timing wise. But one answered questioned spawned a couple more.

I've got what dgi claims to be progressive film. But every now and again, usually right at a scene change, I'm seeing anywhere between 2-10 frames of interlacing. The same with clips where there's a lot of action or fast movement. The fact last exile keeps bouncing between two styles of animation is probably playing a hand in it. But any suggestions on which deinterlacer I should try to remove this?

Dgi tells me 16:9, but the anime itself is full screen. If I wanted to try and letterbox it, or (though why I'd do so escapes me, but hey though i'd ask) convert it to a 4:3 ratio. How exactly do you pull that off in VDM? Or is that more an AVIsynth script function?

Zero1 · Post by **Zero1** » Sun Aug 26, 2007 12:08 am

You can't spell lagarith without the "lag"

AVISynth is your best bet.

BasharOfTheAges · Post by **BasharOfTheAges** » Sun Aug 26, 2007 2:19 am

Some series are a blend of framerates - especially when there's a mix of CGI and traditional animation. Fixing the interlacing in one broad stroke will work for the one part and not the other.

Scaledkittah · Post by **Scaledkittah** » Sun Aug 26, 2007 10:21 am

So in the spots where I do run across interlacing, perhaps try exporting some very short clips with a deinterlace script to avoid messing up the progressive parts?

Though that also makes me wonder, what does happen if you tried to deinterlace something that isn't to begin with? *imagines it's not very pretty*

Qyot27 · Post by **Qyot27** » Sun Aug 26, 2007 11:42 am

The reason it appears 'fullscreen' is because it's anamorphic - it's adjusted to the right ratio on playback based on a flag in the video stream - encoding it without letterboxing improves efficiency. Either that or Last Exile is encoded in such a wonky manner that it's screwing with DGIndex. I'm betting on the first one, though - the same effect could be achieved by resizing manually from 720x480 to 848x480 or 640x352 or any other 16:9 (or approximately 16:9) ratio.