[mythtv-users] mplayer -dumpstream better than myth record
bluey at iguanaworks.net
Sat Sep 15 01:14:41 UTC 2007
Hunter McDaniel wrote:
> I'm wondering if your problem is that same as what I have with one
> particular channel, KTVD-DT in Denver.
> Reception of this channel is rock-solid on a standard STB, and Myth has
> no problem with three other stations whose transmitters are located on
> the very same building with comparable power levels.
> I did a bit of investigation a few months ago, and like you, found that
> I could record my problem channel just fine with mplayer --dumpstream,
> but trying to watch or record it with Myth always gave me freezes and
> lockups. When I turned on some of the detailed logging in the backend,
> I saw that Myth was constantly detecting "discontinuity errors" in the
> PMT, and the logic to recover from those discontinuities seemed to be
> overwhelm the recording process, saturating the CPU and making it drop
> frames. From a more detailed look at the actual frames, I could see
> that the datastream from KTVD-DT had two different PMTs interleaved into
> it, each running a different continuity counter - and hence causing a
> discontinuity on every PMT.
> I don't know if the problem with your station is the same, but it might
> be worth a check.
Yup, that's it. I'm in Denver and the station giving me all these
troubles is KTVD... and the problems is exactly as you've described. I
think I'm having the same problem with FOX (KDVR) only to a much lesser
degree, but I could be wrong. Have you found any solution to this PMT
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