4.2.0 conversions

[rachelw]

Hey, does anybody know if H.264 or mpeg2 (or other) automatically embeds 4.2.0 YUV instead of 4.2.2?

If so, i assume this is native to those compressions, as these settings cannot be seen in properties when squizzing the files or compression settings...

help!!

cheers

r

[E_Tedeschi]

Hey Rachel,

As I understand it, H264 encodes in 4:2:0 only. MPEG2 can encode 4:2:2, but it is a very odd breed of MPEG2 (eg 422P@ML similar to Sony's IMX I-frame format), and is not DVD compatible.

For DVD-Video standard playback, I don't think you're gonna get 4:2:2.

Have a squiz at:

http://en.wikipedia.org/wiki/MPEG-2

http://en.wikipedia.org/wiki/H.264

Hope that helps...?

Enzo.

[rachelw]

yeah I looked at that yesterday, it was pretty good, but I also had looked at some other articles that seemed to allude to the possiblity of H264 handling 4.2.2 as well as 4.2.0, which I thought would allude to the possiblity of it being determined by drivers or whatever the heck, and I can't find any info in relation to settings in the softwares I am trying so I thought I should check - it read poorly, as it was written strangely so I couldn't decipher if they meant it handled 4.2.2 and converted it or if it could pop out either depending on some mystical setting I couldn't find....


Always better to ask than to remain in the dark ages

You are a massive source of knowledge on this site, thanks for your input!

cheers

r

[E_Tedeschi]

Always a pleasure, Rachel. You can never have too much knowledge... :)

Did some more googling on H.264 and found this:

http://www.elecard.com/technology/avc.shtml

Apparently there is a High-Level H.264 profile targeted at broadcast video applications which is 4:2:2, but I doubt there will be much of that floating around... kinda like some old NLEs that used MPEG2 I-frame only codecs... died a pretty quick death...? Or maybe it'll become more prevalent with the advent of HD-DVD or Blu-Ray (if anyone can decide on a standard...).

e.