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Digitales Video (DV) im Seitenverhältnis 16:9 darstellen

Digital video (DV) in the 16:9 aspect ratio display



Frage von xlive:
Oktober 2007

Hi,

have a digital video with the (standard)-measured 720 x 576th Now, the video for the internet are processed, a height of 456 pixels and get in the ratio 16:9 are presented.
Now if I do not understand completely wrong, the broad calculated:
456 * 16 / 9 = 810
to return to the DV format to come, follows in this connection nor calculation:
810 / 1.06667 = 760
So this gives rise to the internet video of the measured 760 x 456th

I see something wrong here, because the video is in the slightly stretched wide!

grüße xliv



Antwort von Udo Schröer:

4:3 and 16:9 videos to use both 576 x 720 pixels. The difference is the pixel ratio



Antwort von Wiro:

"xliv" wrote:
... is the video for the internet are processed, a height of 456 pixels and get in the ratio 16:9 display

Hello,
Internet videos are encoded with square pixels.
810x456 = 16:9 is correct.
Gruss Wiro








Antwort von Markus:

However, it is not advisable in any case, the width of 720 810 pixels aufzublasen. Depending on the video footage can look good or not synonymous.

If it does not look good, leave the 720 pixel in width and center, a Height of (720 9: 16 =) 405 pixels.



Antwort von maus1208:

"Wiro" wrote:
Internet videos are encoded with square pixels.
810x456 = 16:9 is correct.


computer monitors have square pixels and TV equipment nichtquadratische pixel.
what happened to me but now is not entirely clear why the degree is 810 x 456 pixels suitable for square and 760 x 456 not suitable?

gx



Antwort von Quadruplex:

"Anonymous" wrote:
what happened to me but now is not entirely clear why the degree is 810 x 456 pixels suitable for square and 760 x 456 not suitable?

Basic arithmetic: 16:9 corresponds to 1.78. For square pixels you need to register, otherwise than for PAL or NTSC, with no odd factors rumschlagen. So 456 x 1.78 = 811.68.



Antwort von Wiro:

My bill looks somewhat different:
16 / 9 = x/456
x = 810.66666666666666666666666666667
As always synonymous - a bad relationship, as the scaler with the decimal point and therefore must be expected rounding errors produced.

But the default is now 456 px :-( (
Gruss Wiro



Antwort von Blupp:

Thank you.

grüße xliv




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