[mythtv-users] Interlacing question

Daniel Kristjansson danielk at cuymedia.net
Mon Oct 16 13:51:29 UTC 2006

On Sun, 2006-10-15 at 23:27 -0500, Sage wrote:
> I'm currently running MythTV through an nVidia Geforce 6150 with an
> s-video connection to a standard NTSC television.  The resolution of
> X-windows is 720x480.  I'm using a Hauppauge WinTV PVR-150 to record a
> regular NTSC stream.  What this means is that all my recordings are
> 720x480 interlaced video.
> The thing is, x-windows is set to a non-interlaced (480p) resolution.
> Which means that the video must be de-interlaced during playback.
> However, since my display is a regular NTSC television, the end result
> is interlaced again.
> So I'm wondering: Can you set x-windows to actually operate entirely
> in 480i, so that you don't have to de-interlace the video stream at
> all?  Would this work?

Yes, and yes, however if you do this and use MythTV "overscan" or "zoom"
modes you will still need deinterlacing and you will need to record all
streams with 480 lines, i.e. 720x480 is ok, as is 640x480, and 480x480.

-- Daniel

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