Search found 483 matches

by gonca
Mon Apr 23, 2018 5:23 pm
Forum: Avisynth Filters
Topic: HDR -> SDR tonemapping
Replies: 226
Views: 5551

Re: HDR -> SDR tonemapping

It does appear to be a logical approach
If
A>black box >B
then
B> inverse black box >A
Only in this case the black box is a known algorithm
by gonca
Mon Apr 23, 2018 3:49 pm
Forum: Avisynth Filters
Topic: HDR -> SDR tonemapping
Replies: 226
Views: 5551

Re: HDR -> SDR tonemapping

I am a complete rookie at the color thingy, but based on all the stuff I have read on the topic, before my eyes glazed over, your approach seems to be spot on from the format (2020 to 709) to the clamping of the levels to accommodate the 8 bit standard
by gonca
Sat Apr 21, 2018 10:29 am
Forum: DGDecNV
Topic: [SOLVED] Decoding Error / Artifacts
Replies: 11
Views: 138

Re: [SOLVED] Decoding Error / Artifacts

And Quad channel DDR4 memory
P.S.
Nice avatar
by gonca
Fri Apr 20, 2018 6:41 pm
Forum: DGDecNV
Topic: [SOLVED] Decoding Error / Artifacts
Replies: 11
Views: 138

Re: [SOLVED] Decoding Error / Artifacts

https://www.newegg.com/Product/Product. ... -_-Product
might use one of these in my next build
by gonca
Thu Apr 19, 2018 5:49 pm
Forum: Avisynth Filters
Topic: HDR -> SDR tonemapping
Replies: 226
Views: 5551

Re: HDR -> SDR tonemapping

Thanks
by gonca
Thu Apr 19, 2018 5:01 pm
Forum: Avisynth Filters
Topic: HDR -> SDR tonemapping
Replies: 226
Views: 5551

Re: HDR -> SDR tonemapping

Thank you
I didn't see that mentioned in the docs I looked at,
at least not in a way that I understood
:hat:
by gonca
Thu Apr 19, 2018 3:49 pm
Forum: Avisynth Filters
Topic: HDR -> SDR tonemapping
Replies: 226
Views: 5551

Re: HDR -> SDR tonemapping

Code: Select all

clip = core.resize.Point(clip, format=vs.YUV420P10)
will convert to 10 bit, but do I need to use

Code: Select all

clip = core.resize.Point(clip, format=vs.YUV420P10, dither_type=none)
to ensure that no dither is used?
by gonca
Thu Apr 19, 2018 5:09 am
Forum: Avisynth Filters
Topic: HDR -> SDR tonemapping
Replies: 226
Views: 5551

Re: HDR -> SDR tonemapping

According to this link the default is to not add dither
http://avisynth.nl/index.php/ConvertBits

dither = -1
by gonca
Thu Apr 19, 2018 4:47 am
Forum: Avisynth Filters
Topic: HDR -> SDR tonemapping
Replies: 226
Views: 5551

Re: HDR -> SDR tonemapping

Thank you
ConvertBits apparently drops the padded (zeroed) bits
fmtc dithers down
Would this affect the quality?
How do the internal resizers function, dithering, dropping padded zeroes?