[mythtv-users] Re:Xbox overscan work around

[Derek Watson]

I've also seen this problem, but it does only occur for certain overscan
values. If I use "xbv -auto 800 600 4 4" it looks great, but if I use
"xbv -auto 800 600 8 8" it looks terrible, with a nasty interference
pattern visible.

I can only suggest that you tweak the overscan values, particularly if
you are trying to underscan more on one axis that the other (eg. HOC 2,
VOC 8 is bad).

Derek.


Dennis Cartier wrote: 

>Bruce wrote:
>
>> Hi Dennis,
>> That fix worked for me.However, I notice quite a bit of difference in
the 
>> quality of the picture. It is definitely not as clear as before. 
>> Did you notice this? It looks as if it was compressed to mpeg2 and
has some 
>> faint snow. Thats what it reminds me of. 
>
>I was wondering about that. I could not quite put my finger on it, but
>now that you mentioned it, yes I did notice a difference. I was not
sure 
>though, it almost seemed like I could discern the horizontal lines 
>more after the change. After I watched a couple of shows, I guess I
have 
>grown accustomed to it as I can no longer notice it anymore. 
>
>It must be a result of the TV encoder chip leaving artifacts. I wonder
>if trying to keeping the perspective of overscan in check will have any

>effect. I am using 6.0 and 6.0, but perhaps this is causing some sort
of 
>resonance pattern after the adjustment. I would have thought that equal

>X and Y adjustment would have kept the 4:3 ratio, but I will have to 
>experiment with other values.