[mythtv-users] Remote Mythfrontend Problem

Steve Milner mythtv at stephen-milner.me.uk
Wed Jul 22 20:19:44 UTC 2009


On 22/07/09 17:12, Mark Garland wrote:
> Hi Steve,
>
> I'm really not sure how the RingBuf works - I've been looking around the net
> for any documentation without luck.  If you know of any, please let me know!
>
> My setup is Ubuntu 9.04, with KDE.
>> From repositories, 0.21.0+fixes19961-0ubuntu8 for both backend and frontend.
> Video hardware is an AMD/ATI 780g (Radeon HD 3200).  I'm using the Open
> Source Radeon driver as the proprietary one doesn't get on with myth very
> well.
>
> MG
> -----
> "The most overlooked advantage of owning a computer is that if they foul up
> there's no law against whacking them around a bit."
>
>
> -----Original Message-----
> From: mythtv-users-bounces at mythtv.org
> [mailto:mythtv-users-bounces at mythtv.org] On Behalf Of Steve Milner
> Sent: 22 July 2009 17:06
> To: Discussion about mythtv
> Subject: Re: [mythtv-users] Remote Mythfrontend Problem
>
> On 22/07/09 12:45, Mark Garland wrote:
>> Hi Steve,
>>
>> Your logs show the same as the issue I'm having, except mine doesn't just
>> glitch, it completely locks.
>>
>> RingBuf(/video/1001_20090717183822.mpg): Waited 1.0 seconds for data to
>> become available...
>>
>> /video would suggest that the front end is accessing the file directly and
>> isn't streaming it from the backend.
>>
>> I've selected the "Always stream from Backend" option in the hope that
> there
>> was contention between the frontend and backend trying to access the same
>> file, and that this would resolve it as only the backend would be trying
> to
>> get the file.  Too soon to say right now.
>>
>> I'm new to myth, so happy to be corrected by more experienced members...
>
> I've had the "Always stream from Backend" selected as well. I'm not sure
> it improved things much.
>
> However, I also decided to see if it was doing what it should be and
> unmounted /video and it then wouldn't play anything at all.
>
> I'm not sure what that means, to be honest.
>
> I'm fairly sure that it's the backend that creates the RingBuf file.

Well, watching live TV myth needs access to those files in /video !! 
Even with stream from backend selected.

After I unmounted the nfs share /video I got this in the log for the 
frontend:

009-07-22 20:51:22.386 Connecting to backend server: 10.200.1.250:6543 
(try 1 of 5)
2009-07-22 20:51:22.392 Using protocol version 40
2009-07-22 20:51:22.438 TV: Attempting to change from None to WatchingLiveTV
2009-07-22 20:51:22.445 Using protocol version 40
2009-07-22 20:51:24.274 ProgramInfo, Error: GetPlaybackURL: 
'1002_20090722205122.mpg' should be local, but it can not be found.
2009-07-22 20:51:24.282 DPMS Deactivated
2009-07-22 20:51:24.364 New DB connection, total: 3
2009-07-22 20:51:24.426 Connected to database 'mythconverg' at host: 
10.200.1.250
2009-07-22 20:51:24.436 ProgramInfo, Error: GetPlaybackURL: 
'1002_20090722205122.mpg' should be local, but it can not be found.
2009-07-22 20:51:24.508 NVP: Disabling Audio, params(-1,2,44100)
libGL warning: 3D driver claims to not support visual 0x5b
2009-07-22 20:51:24.641 VideoOutputXv: XVideo Adaptor Name: 'Intel(R) 
Video Overlay'
2009-07-22 20:51:24.712 OSD Theme Dimensions W: 640 H: 480
2009-07-22 20:51:26.913 TV: Changing from None to WatchingLiveTV
2009-07-22 20:51:26.915 New DB connection, total: 4
2009-07-22 20:51:26.924 The realtime priority setting is not enabled.
Initialize Yadif Deinterlacer. In-Pixformat = 1 Out-Pixformat=1
yadifdeint: size changed from 0 x 0 -> 720 x 576
2009-07-22 20:51:26.968 Video timing method: DRM
2009-07-22 20:51:26.984 Connected to database 'mythconverg' at host: 
10.200.1.250
2009-07-22 20:51:27.118 ProgramInfo, Error: GetPlaybackURL: 
'1002_20090722205124.mpg' should be local, but it can not be found.
2009-07-22 20:51:27.139 ProgramInfo, Error: GetPlaybackURL: 
'1002_20090722205124.mpg' should be local, but it can not be found.
2009-07-22 20:51:27.205 XMLParse::LoadTheme using 
/usr/share/mythtv/themes/MythCenter-wide/ui.xml
2009-07-22 20:51:33.640 
RingBuf(/GetPlaybackURL/UNABLE/TO/FIND/LOCAL/FILE/ON/localhost.localdomain/1002_20090722205124.mpg): 
Could not open 
/GetPlaybackURL/UNABLE/TO/FIND/LOCAL/FILE/ON/localhost.localdomain/1002_20090722205124.mpg.
2009-07-22 20:51:33.640 NVP, Error: JumpToProgram's OpenFile failed.
2009-07-22 20:51:33.640 NVP, Error: Unknown error, exiting decoder
2009-07-22 20:51:33.641 TV: Attempting to change from WatchingLiveTV to None

And then an error on the screen saying there was a problem with the video.

Anyway, back to glitchy tv!

Oh, don't know if this is relevant but I forced a playback profile to 
use opengl and then mythfrontend segfaulted every time I tried to watch tv.

Regards,

Steve


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