On Sun, 27 Jan 2008 09:33:12 -0800 Herman Robak wrote
On Sun, 27 Jan 2008 16:52:36 +0100, Herman Robak <[EMAIL PROTECTED]>
wrote:
On Sun, 27 Jan 2008 15:42:17 +0100, Terje J. Hanssen <[EMAIL
PROTECTED]> wrote:
...lots of settings...
Are the above settings correct, or should something be changed
and possibly why?
What are really "W Ratio" and "H Ratio" vs "Aspect Ratio"?
w/h ratio _seems_ like pixel aspect ratio. But I have not quite
figured out if that works the way it should.
When I feed the pixel aspect ratio for PAL into it (1.094/1.0)
it changes the X (width) from 720 to 787, which would be the
correct _display width_. (Well, almost. See below.*)
But what Cinelerra then does is to squash the 720 pixels of the
source video so that the new 787 pixel wide canvas fits within
a 4:3 box, with black bars on the sides. That's the opposite of
what I wanted. Is it me or Cinelerra who is dumb here?
*) The 720x576 PAL DV image is actually a little wider than 4:3
http://lipas.uwasa.fi/~f76998/video/conversion/
<http://lipas.uwasa.fi/%7Ef76998/video/conversion/>
http://www.bbc.co.uk/commissioning/tvbranding/picturesize.shtml
Another Set Format menu selection is the Presets submenu:
-> selecting PAL here fills in the preset attributes DV Video
(corresponds mine for SD DV above)
Frame rate: 25.000
Width: 720
Height: 576
W Ratio: 1.000
H Ratio: 1.000
Color model: RGBA-8 Bit
Aspect Ratio: 4.000 : 3.000
Interlace mode: Bottom field first
-> selecting 1080i here fills in the preset attributes for HDV(?) or
full HD Video
Frame rate: 29.9700
Width: 1920
Height: 1080
W Ratio: 2.6667
H Ratio: 1.8750
Color model: RGBA-8 Bit
Aspect Ratio: 16.0000 : 9.0000
Interlace mode: Bottom field first
My first comment is:
This frame rate is for NTSC, not for PAL. Two better options in my
opinion would here be two selections instead: 1080i/60 (for NTSC) and
1080i/50 (for PAL) respectively. A reasonable suggestion?
Second, I notice the Width=1920, and wonder if this yelds for full
1080iHD video only and not for HDV with width=1440?
Third, I notice the changed values W.Ratio=2.6667 and H.Ratio=1.8750
Again, what are and what do these W and H ratios .......?
And fourth, which values here for the anamorphic DV Wide not covered
among the presets?
----------------
Terje J. Hanssen
_______________________________________________
Cinelerra mailing list
[email protected]
https://init.linpro.no/mailman/skolelinux.no/listinfo/cinelerra
