[mythtv-users] How to improve capture quality

[Kevin Kuphal]

On 10/22/07, Jay Mallar <jaymallar at gmail.com> wrote:
> Jay Mallar wrote:
>
> Here's some examples of the quality problems I'm having.
>
> I recorded these by doing "cat /dev/video0 > file".
>
> mysample.mpg
> Notice at the beginning and end of the sample when the guys arms are
> flailing against the snow.  Notice the horizontal lines/blocks that are
> showing up.
>
> mysample-2.mpg
> When the guy is shaking the girl, notice how pixelated his jacket is.
> This sample really highlights the poor quality/grainiess.
>
> Any ideas oh now to improve it?
>
> Also - when I run "mplayer /dev/video0" it dumps out some useful stuff:
>
> :mplayer /dev/video0
> MPlayer 1.0rc2-4.1.2 (C) 2000-2007 MPlayer Team
> CPU: Intel(R) Core(TM)2 Quad CPU           @ 2.40GHz (Family: 6, Model:
> 15, Stepping: 7)
> CPUflags:  MMX: 1 MMX2: 1 3DNow: 0 3DNow2: 0 SSE: 1 SSE2: 1
> Compiled with runtime CPU detection.
>
> Playing /dev/video0.
> MPEG-PS file format detected.
> VIDEO:  MPEG2  720x480  (aspect 2)  29.970 fps  9800.0 kbps (1225.0 kbyte/s)

Try setting your capture resolution to 720x480 in Myth as suggested.
I thought I read somewhere that certain aspects of IVTV capture
filters, etc work best in the driver at 720x480

Kevin