Doom9's Forum - View Single Post - x264

foxyshadis · 23rd May 2014, 00:33

I just mean that you won't ever get "real" NTSC colors with H.264 approximations, which only matters for analog (television shows or VHS), and real NTSC has interactions between luminance and saturation, too. The further you go back, the less standardized it was, thus "Never Twice the Same Color." Real SD NTSC also uses SMPTE 170M color matrix but BT.470M color primaries. (Or vice versa, I forget now.) I got to know all about this when I used to do analog conversions.

You can ignore all of that unless you're on a quest to accurately recreate the experience of watching 20th century TV, and just use smpte170m or bt470bg for SD. It'll look decent.

If you encounter FCC or 240M on a DVD, which I've seen, it might be best to convert to 601 or 709 in AviSynth, since most renderers only understand those two.

23rd May 2014, 00:33	#5 \| Link
foxyshadis Angel of Night Join Date: Nov 2004 Location: Tangled in the silks Posts: 9,559	I just mean that you won't ever get "real" NTSC colors with H.264 approximations, which only matters for analog (television shows or VHS), and real NTSC has interactions between luminance and saturation, too. The further you go back, the less standardized it was, thus "Never Twice the Same Color." Real SD NTSC also uses SMPTE 170M color matrix but BT.470M color primaries. (Or vice versa, I forget now.) I got to know all about this when I used to do analog conversions. You can ignore all of that unless you're on a quest to accurately recreate the experience of watching 20th century TV, and just use smpte170m or bt470bg for SD. It'll look decent. If you encounter FCC or 240M on a DVD, which I've seen, it might be best to convert to 601 or 709 in AviSynth, since most renderers only understand those two.