Mini DV 16:9 to PAL 4:3 letterboxed

[cd090580]

Hi,

I have some clips shooted in 16:9 with a mini dv camera and I'd like to encode them as 4:3 letterboxed.

No problem for that.
I use TmpgEnc Xpress to do the encode, the "problem" is that tmpgenc detectes all the avis as 4:3 instead of 16:9. I just have to change the source format in the source clip settings but what's the différence between these 2 options:

* Display 16:9
* Pixel 16:11 (PAL 16:9)

When I choose one or other, I don't see any difference in the preview. So I think I can use any one ???

[jagabo]

For your source there is little difference.

If your source wasn't 720x576 there would be a difference. "16:9 Display" means the video, regardless of the frame size should be displayed as 16:9. The "Pixel 16:11 (PAL 16:9)" setting means the aspect of individual pixels is 16:11. When the frame size is 720x576 with 16:11 pixels the display aspect ratio is 16:9. (Actually the 16:9 image is held in a 704x576 portion of the 720x576 frame. There are 8 pixels of border at the left and right edges to bring the frame width up to 720.)

SAR * PAR = DAR

(704/576) * (16/11) = 1.778 = 16/9

If your source had black bars top and bottom (a 2.35:1 movie for example), and you trimmed them off before sending the video to TMPGEnc, you would have to use the 16:11 PAR setting to maintain the proper 2.35:1 DAR (ie, the remaining pixels are still the same shape as they were before). If you used the 16:9 DAR setting the final video would play 16:9, not 2.35:1.

[cd090580]

My source was filmed with a mini dv camera set in 16:9 mode.
The is no black border on left and right sides.

here is what gspod said:

[jagabo]

My source was filmed with a mini dv camera set in 16:9 mode.
The is no black border on left and right sides.

That doesn't matter. Camcorders often continue the image out to the edges. Otherwise, people would think there's something wrong with the camcorder. The 16:9 frame is still contained the inner 704x576 portion.

[cd090580]

Ok, so I need to use 16:9 display ???

[jagabo]

It doesn't matter which you use. They are both the same in your case. Because a 720x576 frame with 16:11 pixels is by definition 16:9 DAR.

[cd090580]

ok, thanks.