[mythtv-users] Channel scanner won't find a specific channel

[John Pilkington]

On 04/02/16 19:24, David Parker wrote:
> Thanks for all the help so far.
>
> I now have the channel set up in MythTV and can see it, but there's a
> new wrinkle.  The stream from this channel (and only this channel) seems
> unstable, at least in MythTV.  In both recordings and live TV, the video
> shakes slightly and the sound stutters.  The weird thing is, this
> doesn't happen when I capture the raw stream and view in in mplayer:
>
> $ dvbv5-zap -c dvb_channel.conf -v -r "WFXV HD"
> $ cat /dev/dvb/adapter0/dvr0 > hd_test_1.dat
>
> Viewing hd_test_1.dat in mplayer shows the video and audio are fine.
> This issue seems to be isolated to MythTV, and/or the MPEG-2 compression
> of the stream.  But it doesn't happen on any other channels.  Is there
> something I'm missing here?
>
> Thanks!
>

Perhaps myth is having to process other streams, like subtitles, or 
processing other stuff?  Do you have any indication of signal strengths 
for all the channels you see?

'mythffmpeg -i  hd_test_1.dat'  might help - and allow comparison with 
other channels.  You can also display some diagnostics via
Menu > Playback > Playback Data