[mythtv] 0.18 Choppy audio and video on some uk
freeview dvbchannels
Jason
jandmspam at earthlink.net
Sun Apr 17 20:38:40 UTC 2005
I'm seeing similar problems with straight 0.18. I repeat this is 0.18
tarball (not CVS).
Symptom is choppy audio/video. Sounds kind of like when people beat on
their chests to impersonate a helicopter news update. Some channels
seem _better_ than others.
I'm using 2 pchdtv (hd-3000). Watching free over the air ATSC. My
backend is a 1.8 Athlon. Connected to 3.2 P4 via 100 Mbps LAN. With my
old setup playback was flawless.
Things I changed...
Kernel: from 2.6.10 to 2.6.11
mythtv: from .17 to .18
Driver: from pchdtv2.0 (v4l) to pchdtv2.0 (dvb)
If I change the dvb settings to record TS instead of PS seems to fix the
video on all channels and the audio on _some_ channels. Some channels
now totally lose their audio.
Using +/- to change audio streams has no effect.
> Anyone else finding that the latest CVS and DVB loses audio very
> frequently? For me it appears as if it is auto switching audio streams.
>
> Any ideas?
>
>
> On 4/17/05, *John Harvey* <john.p.harvey at btinternet.com
> <mailto:john.p.harvey at btinternet.com>> wrote:
>
> I set the "Use Hardware MPEG decoder" option in mythtv-setup to
> fix this
> problem. Before setting this I had the same problem with the 350
> though the
> video plays back ok in mplayer and if you disable the use of the
> 350 for
> playback (which was how I watched a recording that was like this).
> I haven't tried switching to recording TS to see if that helps though.
>
> John
>
> > -----Original Message-----
> > From: mythtv-dev-bounces at mythtv.org
> <mailto:mythtv-dev-bounces at mythtv.org>
> [mailto:mythtv-dev-bounces at mythtv.org
> <mailto:mythtv-dev-bounces at mythtv.org>]
> > On Behalf Of Greg Grotsky
> > Sent: 17 April 2005 20:13
> > To: Development of mythtv
> > Subject: Re: [mythtv] 0.18 Choppy audio and video on some uk
> freeview
> > dvbchannels
> >
> > Roger,
> >
> > Try running mythtv-setup and switching the recording type on
> your card
> > from PS to TS. I found an issue that came up from a CVS commit from
> > March 27 to March 29th that broke a couple channels on my setup...
> > switching to TS fixed the problem. It turns out that those channels
> > that were broken have mulitple audio streams associated with
> them. If
> > they have more than one stream you may have to hit '+' to get the
> > stream to play when watching the channel in TS mode.
> >
> > Good luck,
> >
> > -Greg
> >
> > On 4/17/05, Roger James <roger at beardandsandals.co.uk
> <mailto:roger at beardandsandals.co.uk>> wrote:
> > >
> > > I have just upgraded to 0.18 and I now have a problem with
> certain UK
> > > freeview channels (DVB-T) viewed as live TV. I was running a
> CVS build
> > from
> > > about a month ago and that was working perfectly.
> > >
> > > There are no error messages appearing in the logs, so maybe
> the problem
> > is
> > > different than the one already reported on the list (Re:
> [mythtv] A/V
> > Bug in
> > > CVS from 12:00am 3/27 to 12:00am 3/29).
> > >
> > > The problem manifests as choppy audio and jerky video which seems
> > similar to
> > > the problem already reported. The choppiness is very regular
> at approx
> > 500ms
> > > repeat rate (this suggest some sort of timing problem)
> > >
> > > The channels it appears on are constant, but are not related
> to a single
> > > multiplex. I have not been able to determine what the common
> factor is.
> > <clip>
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