[mythtv-users] Can't "watch" radio channels in LiveTV

[Gavin Whitehead]

On 01/02/2012 11:31, Lawrence Rust wrote:
> On Tue, 2012-01-31 at 22:18 +0000, Gavin Whitehead wrote:
>> Hi,
>>
>> Should I be able to 'watch' (well listen) to radio stations in MythTV
>> via LiveTV?
>>
>> I'm installing MythTV 0.24.2 (combined BE/FE) on Ubuntu 11.10 in the
>> UK.  I've tried this with both DVB-T ans DVB-S2 tuners with the same
>> result, that is it fails.
> Unfortunately 0.24 has problems in dealing with low bit rate (<256kbps)
> streams i.e, radio.  Mark Kendall has addressed some of these in the
> current git master but there still are a few remaining niggles.
>
> I often listen to DVB-S radio so I reported this as a bug back in June
> last year http://code.mythtv.org/trac/ticket/9824 together with some
> patches.  Unfortunately the ticket is still outstanding.
>
> If you want to build your own patched Myth then you can get my patches
> from here:
> http://www.softsystem.co.uk/download/mythtv/mythbuild-CURRENT.zip
> I try to keep the patches up to date with the the current git repo.
>
> The relevant patches for 0.24.2 are:
> mythpatches-0.24/mythtv-0.24/0039-MythPlayer-Improvements-to-DVB-S-radio-playback.patch
> mythpatches-0.24/mythtv-0.24/0041-RingBuffer-CalcReadAheadThresh-mods-for-low-bit-rate.patch
>
> And for current git master are:
> mythpatches-0.24/mythtv-master/0020-MythPlayer-Improvements-to-DVB-S-radio-playback.patch
> mythpatches-0.24/mythtv-master/0021-ringbuffer-Adapt-readahead-for-low-bit-rate-64kbps-r.patch
>
>> I perform a scan (DBV-S in thie case) and can then watch TV stations
>> from the FE.  However if I switch to a radio station, for example Radio
>> 4, the OSD remains on the screen for 30 to 60 seconds, during which time
>> I can hear the radio station.  Then the FE exits LiveTV with the error
>> "Video frame buffering failed too many times." on the screen.
>> If I go and look in the FE log I see lines and lines of
>>
>>       Player(1): Waited 100ms for video buffers
>> AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAU
>>
>> with a few lines like this mixed in
>>
>>       RingBuf(/home2/mythSGs/livetv/7754_20120131220454.mpg): Waited 0.2
>> seconds for data
>>           to become available... 18672<  32768
>>
>> Then I get
>>
>>       Player(1), Error: Waited too long for decoder to fill video
>> buffers. Exiting..
>>       TV: Attempting to change from WatchingLiveTV to None
>>       BrowseEnd()
>>       RingBuf(/home/mythSGs/livetv/1700_20120129221157.mpg): Waited 0.2
>> seconds for data
>>           to become available... 7112<  32768
>>       RingBuf(/home/mythSGs/livetv/1700_20120129221157.mpg): Waited 0.2
>> seconds for data
>>           to become available... 6460<  32768
>>       Player(1), Error: Failed to stop decoder loop.
>>       MythPainter: 40 images not yet de-allocated.
>>        [mp2 @ 0x7f17dbc91700]incomplete frame
>>        Error: Unknown audio decoding error
>>       TV: Changing from WatchingLiveTV to Non
>>
>> This seems to be the same whichever radio station I choose.
>>
>> Oh, and another issue.  Whenever I go back to LiveTV it is now stuck on
>> Radio 4 (channel 1004 on my system).  How do I get out of this?  That
>> is, how do I get LiveTV to go back to starting on BBC 1 (or anything
>> other than the radio station it can't deal with).
> You need to run mythtv-setup, select "4. Input Connections" then your
> configured card and finally change the starting channel.
>
>> Gav
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>
Lawrence,

Thanks for letting me know.  Shame it doesn't work but I guess all I 
really want to do it record radio programs, and that seems to work.  Now 
I just need to find a way to mark a channel as 'available to record' and 
not 'available to watch'!

Gavin