[vdr] Re: Bad compression on Pro7

[Matthias Schniedermeyer <ms@citd.de>]

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.



-- 
Info:
To unsubscribe send a mail to listar@linuxtv.org with "unsubscribe vdr" as subject.