[mythtv-users] Audio buffer overflow when FFWD ... did, something change in the latest SVN versions?

[Martin Lynch]

>
> 2008/2/3, Michael T. Dean <mtdean at thirdcontact.com>:
>   
>> > On 02/03/2008 04:50 AM, Ma Begaj wrote:
>>     
>>> > > 2008/2/2, Ma Begaj <derliebegott at gmail.com>:
>>> > >
>>>       
>>>> > >> I am getting sound problems when fast forwarding in a recording. Sound
>>>> > >> is stuttering or playing just normal while I ffwd in the recording
>>>> > >> with 3x, 5x or 10x speed.
>>>> > >>
>>>> > >>  I started seeing these problems maybe two weeks ago, but I did not
>>>> > >> have enough time to investigate more. I am using latest patch from
>>>> > >> http://svn.mythtv.org/trac/ticket/1104 and I thought that this might
>>>> > >> be a reason. But it is not (I tested today without the patch).
>>>> > >>
>>>> > >> Mythfrontend takes around 20% of the CPU when watching a recording
>>>> > >> without the patch and around 40% when running with the patch, even
>>>> > >> when I use ALSA:default.
>>>> > >>
>>>> > >>
>>>> > >> I do not remember that sound was even played before (2-3 weeks ago)
>>>> > >> when I was ffwd/bwd  in the recording. The picture is also stuttering
>>>> > >> partly during ffwd/bwd probably because of these sounds problems.
>>>> > >>
>>>> > >> Did I maybe miss an option in the configuration to disable playing
>>>> > >> sound while fast forwarding? What is the point of playing sound during
>>>> > >> fast forward?
>>>>         
>>> > > Someone with an idea?
>>>       
>> >
>> > Assuming you're right about it not having to do with #1104, this
>> > (playback of audio during fast forward) usually occurs because of a
>> > corrupted seektable.  optimize_mythdb.pl, then use mythcommflag
>> > --rebuild or (for MPEG-2), mythtranscode --buildindex on each affected
>> > recording.
>> >
>> > Mike
>>     
>
> Thanks, I forgot to check the seektable. I will test it tomorrow.
>   
I posted about this same problem several days ago but didn't get any 
responses. My first thought was also a corrupted table, but not the 
case. I think there are some serious issues with some of the latest SVN 
versions: in addition to the stuttering audio, transcoding now makes 
files that are BIGGER than the original (in some cases remarkably so: 4 
hours of the Australian Open in HD went from 17GB to 33GB!)...

ML



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