DVD to HD (resize and enhance image quality)

[SB4]

Hi,



Is it possible to make DVD quality video file to be like HD (1280x720) video with a good image quality ?! and Which filter is helping me do make the image look better or enhance the quality when resizing the file ?!

Sample:
http://www.mediafire.com/?d1txvvovokebscv


Best Regards,

[hech54]

You can't do better than an upscaling DVD/Blu Ray player.

[jagabo]

You can do better than an upscaling player, especially with anime, but it's not worth the time and effort.

[SB4]

thanks hech54 and jagabo

So it is hardware work not software ?!

[jagabo]

Nobody would ever design any filtering hardware without prototyping in software first. So anything done in hardware can be done in software too -- just not as fast.

Look at NNEDI() for AviSynth, for example.

In the end what you'll end up with won't be HD it will be enlarged, sharper, SD. And you'll be better off starting with the DVD rather than an Xvid AVI.

[SB4]

thank you for the advice

[jagabo]

Here's your sample upscaled, filtered, sharpened, deshaked, to 960x720 h.264 mkv.

[SB4]

Great work jagabo

How did you do that ?

[jagabo]

I did it all in AviSynth but I don't remember the exact filter chain. I used ColorYUV() to fix the black and white levels (contrast stretch), Deen() for noise filtering, NNEDI() to double the frame size, LanczosResize() to get it down to 960x720, Stab() to deshake, and a little Sharpen(). Fixing the levels made the biggest difference. The increased contrast enhanced the color and apparent sharpness.

Oh, I think I also enabled deblocking and deringing in the Xvid decoder.

There are still some problems. Posterization and flickering in the original where enhanced by the contrast stretch.

[SB4]

thanks jagabo i will try this filters but if remember the script you wrote post it here. please...

[jagabo]

The filter chain was something like this:

AviSource("Tetsujin.avi")
ColorYUV(gain_y=50, off_y=-24)
Deen(thrY=12, thrUV=14)
nnedi3_rpow2(rfactor=2)
Stab()
Crop(4,4,-4,-4)
LanczosResize(960,720)
Sharpen(0.3)

I used NNEDI instead of NNEDI3 (as in the above script) but if you're going to try this yourself you might as well use the newer NNEDI3.

[SB4]

thanks jagabo

[jagabo]

I noticed some of the frames in my upscaled video had a color shift but I thought it was just because the increased contrast amplified small color differences in the source. But I tested Stab() with some grayscale video today and it is discoloring some frames -- some are getting greenish cast.