Question about re-sizing video

[hizzy7]

Hi Friends!

I have a question for the video gods here about re-sizing video. I have a clip here that looks huge on-screen. I think it's been blown up too big and would actually look better as a letterboxed video. Is it possible to do that with AVIsynth? Here is the clip:


http://files.videohelp.com/u/183506/ANGEL%20TERMINATORS%20II_1.demuxed.m2v


Thank you again for your help!


Best,


h

[sanlyn]

It's a 16x9 video that looks the way it's supposed to look when properly played in a media player. If you want it to be smaller, reduce the size of the player's window. On a TV, it should fill a 16x9 screen. Actually, it's already letterboxed slightly. The frame aspect ratio is 16:9 (1.777778:1) but the video image itself is 1.875:1, which is wider than 16x9. There are about 12 pixels of letterbox border at the top and nbottom to maintain the 1.875:1 image ratio on a 16x9 screen.

It's also oversaturated with invalid chroma and luma levels, and the color is really ugly.

[jagabo]

You can letterbox it with:

LanczosResize(720, 360)
AddBorders(0,60,0,60)

Then reencode as 4:3. When you watch it on TV you'll see a small picture with black borders all around.

[hizzy7]

Hi!

Thanks for the help! What are "invalid chroma and luma levels"??? Thanks!!!

[sanlyn]

I think you've been over that earlier. The valid luma range for most standard video such as DVD or AVCHD/BD standard disc are RGB 16-235 for luma, RGB 16-240 for chroma. The valid range for PC-only and web display is RGB 0-255 for luma and chroma. This range is known a the "broadcast standard". "Invalid" levels and chroma includes crushed darks and blown-out highlights. Sometimes detail in those areas can be recovered, sometimes not.

Some of the images in your sample video lie within the standard range, but many do not. There are signs of crushed darks, and some brights have lost detail earlier in the processing. It often looks oversaturated and the color balance is out of whack. But if it looks OK to you, don't worry about it.

That hot red gets ugly at times:


[Attachment 20781 - Click to enlarge]

[Attachment 20782 - Click to enlarge]

But it would take too long to fix all that for the entire movie. I'd just leave it alone. The aspect ratio is correct, and it's a good bitrate without too much noise.

IMHO.

[brassplyer]

Why do the actors always move the same abrupt, affected way in these Asian chop-socky flicks?