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View Full Version : MPEG-2 for BD should really have "16-235" levels?


Malow
22nd May 2008, 19:36
ive "analyzing" footage from hdv, and hd cameras (pmw-ex1 for example) and i was shocked to see these cameras record video with full range (or "super-whites").

ive looked around and everywhere they say that BD video shoud have "tv levels" (16-236).


example of pmw-ex1 video levels
http://img58.imageshack.us/img58/3381/histogramuo5.png

so, i guess i must convert and recompress? or full range video is "alowed"?

Atak_Snajpera
22nd May 2008, 20:04
so, i guess i must convert and recompress? or full range video is "alowed"?

Oh my god. That was good :)
Of cource full range is allowed! It is a matter of contrast. I see no reason why movies with less contrast would not be compatible with something. Don't be funny :)

Malow
22nd May 2008, 20:18
but the thing is:

i whant my videos to be "in the standards".

if movies are "tv levels" (ive seen experts say that all are) my video will have crushed blacks/whites on devices adjusted "for movies"

i dont want clipping... over-contrast looks horrible. and pale low-contrast also ;)

tha problem is not "compatbility", but "be as should be"

ive read also that some devices do not output signal below/above tv levels, so, it will clip the output even adjusting the tv set....

Atak_Snajpera
22nd May 2008, 20:24
Most new TVs and equipments (PS3) support full-range so If you want to destroy colors in your source by using 16-235 format go ahead.
BTW. All my HD movies have full range (300,x-men3 and so on). If company doesn't care about that why you should?