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[vdr] Re: Bad compression on Pro7
On Fri, Oct 11, 2002 at 03:59:07PM +0200, Christof Soehngen wrote:
> Hi there,
>
> almost every day, I'm wondering if there is something wrong with MPEG
> compression on Pro7. On some fast scenes, I can see huge blocks on the
> screen. An example is the "Switch" show, in the intro.
>
> Now I do understand the basics of MPEG, nevertheless, I don't think it's
> normal. During most fast scenes, for example in movies, everything looks
> good.
>
> Does anyone have an explanation?
It is 100% and totaly normal.
Every 12 Frames (0.5 Seconds) is a Key frames. The 11 frames between
each Key-Frame are Delta-Frames. Too much changes/movement result in the
picture getting block-artefacts. It's a weakness in the system that
can't be resolved.(*)
*: I won't fill this foot-note. It could fill a whole book. :-))
Bis denn
--
Real Programmers consider "what you see is what you get" to be just as
bad a concept in Text Editors as it is in women. No, the Real Programmer
wants a "you asked for it, you got it" text editor -- complicated,
cryptic, powerful, unforgiving, dangerous.
--
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