Detail reconstruction using difference...

[lnatan25]

Hey guys!

I have an idea, and want to see if it is even feasible. I have this AVS code:

original=directshowsource("1080p source").trim(10023,11455)
encode=directshowsource("320x136 encode").Lanczos4Resize(1920,800).trim(10023,11455).sharpen(1.0)
#encode=original.Lanczos4Resize(320,136).Lanczos4Resize(1920,800).trim(10023,10555)
difference=overlay(original, encode, mode="Subtract", pc_range=true)
reconstruction=overlay(encode,difference,mode="Add", pc_range=true)

return reconstruction.ConvertToYV12()

The difference that comes out is very compressible, and the 320x136 encode is tiny (low bitrate). Can some detail reconstruction be achieved by this? The idea is doing a lot of work at first (encoding, generating difference encode) and the end (adding encode and difference), but ending up with something very small (encode and difference files). Data loss and unwanted artifacts will probably occur, but the question is, will they be up to an acceptable levels.

If this is not possible, please provide with an explanation.

Thanks in advance,
Leo