Anamorphic how to do

[Mitchjs]

I need a bit of help

I cant find any clear answers on the net nor in the forums...

real example:

I have a 608 x 256 Xvid, so that 2.35:1 and i assume square pixels...

i wanna make a anamorphic dvd ofcourse

so i feed it into Virdub, for a nice resize... then frame serve it to tmpeg (i find virdub's resizing better thand tmpegenc's)

what would the new size info be? do i just increase the hieght by 33%?
do i resize to full with 720 and keep aspect ratio... so that would be 720 x 303 and then add 33% more?

Im confused... i just want it to be right in both 4x3 and 6x9 modes (hense anamorphic)


does pixel shape have to betaken into account.. id think yes

there is got to be a easy way to do this...

some fancy calculator :)

mitch

[SomeJoe]

The problem is that your 608x256 original doesn't really contain enough picture data to make the anamorphic conversion worthwhile. In other words, all the resizing you're going to do is resizing upwards, thus the algorithms have to interpolate and smooth to get the larger size.

But, if you really want to make the DVD anamorphic, do the following:

First, you need to get the aspect ratio of your material to the proper 16:9 (1.778). Since your source is 2.35:1, you need to add black bars to the top and bottom of your frame so that your clip becomes 608x342. This equates to adding 43-pixel black bars to the top and bottom of the clip.

Then, resize the clip to 720x480 (NTSC) or 720x576 (PAL), and author with your favorite authoring program as a 16:9 movie. The DVD player will automatically further letterbox the content for display on a 4:3 screen, or stretch the picture to remove the anamorphic aspect when displayed on a 16:9 screen.

[Mitchjs]

ok, thats a bit helpful

what made you say i dont have enough picture data?
the low verticle resolution?


my goal is to get this movie to look aspect correct on a 16x9 tv
but at the same time allow correct viewing in 4x3

so basicly i get a movie to 16:9 then resize to full frame?

on another note, what happens to a 4x3 mpeg if i change its flags to 16x9, then author to 16x9.... what does it look like on a 1) 4x3 tv and 2) a 16x9 tv?

mitch

[SomeJoe]

Originally posted by Mitchjs
ok, thats a bit helpful

what made you say i dont have enough picture data?
the low verticle resolution?


my goal is to get this movie to look aspect correct on a 16x9 tv
but at the same time allow correct viewing in 4x3

so basicly i get a movie to 16:9 then resize to full frame?

on another note, what happens to a 4x3 mpeg if i change its flags to 16x9, then author to 16x9.... what does it look like on a 1) 4x3 tv and 2) a 16x9 tv?

mitch

Yes, the low vertical resolution (and horizontal resolution) will make the resizing not look very good. You always want to resize smaller, not bigger. If your source was starting from 853x363 or larger, all resizing would be smaller, and it would look great.

Yes, follow my directions above to author what you have in 16:9.

If you change flags on a 4:3 MPEG to 16:9 and author as 16:9 letterbox:

On a 4:3 TV, the picture will be letterboxed and displayed as a 1.78:1 picture aspect ratio, with very wrong pixel aspect ratio ... all scenes will look squashed vertically (circles will turn to ellipses, long on the horizontal axis).

On a 16:9 TV, the picture will fill the frame (again, 1.78 picture aspect ratio), with the same incorrect pixel aspect ratio, and will look squashed vertically the same as above.

[LB]

Originally posted by SomeJoe
If you change flags on a 4:3 MPEG to 16:9 and author as 16:9 letterbox.

Well it's not even necessary to change the flags, this goes for encoding in CCE too. You can encode as 4:3 even though it's 16:9 or visa-versa and as long as you select the right flag during the compile you're A+. ;)

[auenf]

Originally posted by LB
Well it's not even necessary to change the flags, this goes for encoding in CCE too. You can encode as 4:3 even though it's 16:9 or visa-versa and as long as you select the right flag during the compile you're A+. ;)

actually, in Scenarist (and lesser versions), it will ONLY go by the aspect ratio specified in the m2v, and you cant override it.

Maestro (and lesser versions) will let you override the aspect ratio in the m2v (it actually doesnt check it iirc).

Enf...

[roach76]

The location, 'The Great Southland' is?

[auenf]

close to you ;)

Enf...