[mythtvnz] Channel change stability issues with MythTV and VDPAU in NZ

[Steven Ellis]

On 1/06/2009, at 5:10 PM, Steve V wrote:

> Hi Steve,
>
> I want to see if I can replicate this issue with my system. Just to  
> keep the variables similar - when you change channels do you wait  
> for the new channel to show before selecting another channel or do  
> you just keep pushing channel number buttons until the frontend exits.

For this issue I've been waiting for the channel to display and then  
quickly switching to a different channel.

It appears that Jean thinks the issue may reside in the version of  
ffmpeg that 0.21-fixes is based on.

Steve


>
> Cheers
>
> Steve
>
> From: Steven Ellis <steven at openmedia.co.nz>
> To: MythTV in NZ <mythtvnz at lists.linuxnut.co.nz>
> Sent: Monday, 1 June, 2009 4:30:59 PM
> Subject: Re: [mythtvnz] Channel change stability issues with MythTV  
> and VDPAU in NZ
>
>
> On 1/06/2009, at 3:26 PM, Steven Ellis wrote:
>
>> I've finally got a debug dumps from a recent Jean-Yves MythTV build  
>> that shows the two issues I'm regularly seeing with VDPAU playback  
>> of freeview|HD here in NZ.
>>
>> 1. MythTV frontend exits during a channel change
>>
>> Test environment
>>     * Ubuntu 8.10 32bit
>>     * NVidia VDPAU 185.19
>>     * mythtv - 1:0.21.0+fixes-20550-openglvdpau-debug-0ubuntu2
>>
>> You can find the debug files here
>>
>> MailScanner has detected a possible fraud attempt from "www.mythtv.co.nz 
>> " claiming to behttp://www.mythtv.co..nz/shared/vdpau/channel_crash/ 
>> gdb.txt
>> http://www.mythtv.co.nz/shared/vdpau/channel_crash/myth.log
>>
>> To produce the problem I select a freeview|HD only channel, and  
>> then change between random channels reasonably quickly until the  
>> frontend exits, or I hit my other issue shown below.
>>
>
> I've now reproduced the frontend crash problem with an updated build
>
> Test environment
>     * Ubuntu 8.10 32bit
>     * NVidia VDPAU 185.18.14
>     * mythtv - 1:0.21.0+fixes-20649-openglvdpau-debug-0ubuntu2
>
> Files here
>   http://www.mythtv.co.nz/shared/vdpau/channel_crash2/gdb.txt
>   http://www.mythtv.co.nz/shared/vdpau/channel_crash2/myth.log
>
> Steve
>
> Steven Ellis - Technical Director
> OpenMedia Limited
> email   - steven at openmedia.co.nz
> website - http://www.openmedia.co.nz
>
>
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Steven Ellis - Technical Director
OpenMedia Limited
email   - steven at openmedia.co.nz
website - http://www.openmedia.co.nz

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