[mythtv-users] Resolution

[James L. Paul]

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On Tuesday 02 December 2003 08:56, Douglas Phillipson wrote:
> I guess I don't understand the resolution settings.  I change them and
> don't see any difference in video.  What am I missing?

That's a good thing. Consumer TV displays are pretty low resolution devices, 
so without knowing how low you set yours it's hard to say what you are 
missing. :)

VHS is generally accepted to be equivalent to 352x240 if there are no 
noticeable compression artifacts. SVHS is generally 352x480. If your 
resolution is higher than this and you are using a high enough bitrate to 
avoid compression artifacts, then it's entirely likely that the difference in 
the results is very subtle.

The TV out quality of most video cards isn't usually good enough to 
distinguish the subtle differences, and scaling the video on a computer 
monitor doesn't give a true representation of the video quality.

My goal is to use the lowest resolution and bitrate I can without noticing a 
quality drop. For me and my dvd player, that happens to be MPEG2 1/2 D1, so I 
use 352x240 at about 2500k bitrate. (Which also happens to be perfect for CVD 
and DVD which my standalone player works great with.)

Unless you set the bitrate or resolution too low, you probably aren't going to 
see big differences in quality. You will see big differences in file size 
though! :)

> DSP
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