[mythtv] Slight choppiness question

John Hurliman jhurliman at focustheater.com
Wed Aug 6 22:50:39 EDT 2003

Have you tried turning off deinterlacing in myth to see if the 
choppiness goes away? You might be just a tad short on cpu power.


Sam N. Max (snx) wrote:

>When watching MythTV through tv-out (and I believe it did this on the
>monitor as well), I have noticed the video seems very slightly choppy.  This
>isn't very noticable normally, however on channels with scrolling news
>tickers it becomes an annoyance.  Also, some interlacing issues are
>noticable with this setup as well.
>I'm using MythTV 0.10, with nvtv set on "Large" (or "Huge", or whatever it
>is called), NTSC, with the flicker filter off (it's on a TNT2 with the
>slightly older conexant tv-out chip).  Under this setup the image fills the
>screen just like on a normal television.  I've tried it with and without the
>"experimental a/v" (with the jitter removal on with experimental a/v).
>With xawtv, there are no issues with jitterring.  Even the news tickers are
>silky-smooth with no interlacing issues (it has the benefit of using video
>overlays directly from the tv driver to the screen through XvPutVideo).
>Anyway, I was wonderring whether this was an issue with how MythTV uses Xv,
>or something else with my setup.  Given my luck with xawtv I think it may be
>at least possible to get it looking better.  I do have a somewhat slow
>system, a Celeron 1Ghz, though I don't think that's the issue, or at least
>the whole issue.  The videos I'm playing are 384x480 mpeg 4, 1800 Kbps.
>I do get similar issues with mplayer as well when playing these videos,
>though I've only tested with normal Xv output thus far.
>- Eron

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