[mythtv-users] HDHR QAM: Streams ok to VLC but not Mythtv

R. G. Newbury newbury at mandamus.org
Wed Jan 3 22:32:37 UTC 2007

P S wrote:
> On 1/2/07, P S <guierrmo at gmail.com> wrote:
>> On 1/2/07, R. G. Newbury <newbury at mandamus.org> wrote:
>>> P S wrote:
>>>> I'm using and HDHomerun to tune QAM256 on comcast.  Most channels are
>>>> fine but there are a few that will tune and lock but will not display
>>>> in live TV or recorded programs.  Xine will play, but there is not
>>>> audio.
>>>> I'm running trunk svn 12306.
>> I ran a scan many times, even deleting the source and starting from scratch.
>> I think I upgraded 12/20/2006
> Little more info for frontend with -v channel,record,siparser
> not much here from what I see
> 2007-01-02 21:38:05.095 TV: Attempting to change from None to WatchingLiveTV
> 2007-01-02 21:38:05.101 Using protocol version 32
> 2007-01-02 21:38:05.349 TV: Output filters for this channel are: ''
> 2007-01-02 21:38:05.352 NVP: Disabling Audio, params(-1,2,44100)

I am not sure about the HDHomeRun, but with the HD3000 you have to 
ensure that the audio is always set for 48000..otherwise it gets 
disabled. (This could be your problem in xine also...)

As to why some channels do not lock, I can only suggest that something 
is set wrong. Have you checked the cardinput, and capturecard tables to 
see that both show the same information for each tuner?

Have you checked the channels table to ensure that the information which 
should be the same throughout all channels, is in fact the same?

Your last chance is to get the dvb-app tools from linuxtv.org, and run 
atscscan to get a channels.conf mapping. Then you can check the 
frequency (in dtv_multiplex) and serviceid (in channel) to ensure that 
they are correct...Note that sometimes the scan leaves a Video ID or 
AudioID as 0 even though the servicesid is listed...Xine appears to 
require the correct vid and aid to play properly. Mplayer can be called 
with the vid and aid alone, if the tuner is tuned to the correct 
frequency. (Neither vid nor aid show up inthe myth tables.)


More information about the mythtv-users mailing list