[mythtv-users] Playback of recordings from C4HD slow to start

[Robert Longbottom]

On 11/12/2012 12:52, John Pilkington wrote:
> On 11/12/12 11:11, Paul Gardiner wrote:
>> On 10/12/2012 15:52, Robert Longbottom wrote:
>>  > On 10 Dec 2012, at 02:46 PM, Tim Draper <veehexx at gmail.com
>>  > <mailto:veehexx at gmail.com>> wrote:
>>  >>
>>  >> On 9 December 2012 16:26, Robert Longbottom <rongblor at googlemail.com
>>  >> <mailto:rongblor at googlemail.com>> wrote:
>>  >>     Is anyone else seeing this?  I've been seeing it for a while now,
>>  >>     but have only just gotten round to looking into it.
>>  >>
>>  >>     I'm running MythTV 0.25.2 on Gentoo.  I have a master backend and
>>  >>     a remote frontend.
>>  >> I've noticed this also. I'm on 0.26 with split BE & FEs.
>>  >> i'll give it another check when i get home (if i remember). i did a
>>  >> full rescan a week or 2 ago to fix some EIT issues i was
>> experiencing.
>>  >> i dont recalling having the issue since then.
>>  >> Looks like i have a couple of recordings of C4HD content to check
>>  >> with, both pre and post re-scan.
>>  >
>>  > Ah, interesting. Let me know what you find out. If I just need to
>> rescan
>>  > C4HD that would be a good result. I hardly ever rescan so that could
>>  > certainly be an issue for me.
>>
>> I've always assumed it was because C4HD transmissions have very
>> infrequent I-frames. I think mythtv waits for one before starting
>> playback. I've been meaning to take a look sometime.
>>
>> One slight flaw in that thought is that you'd expect to be lucky
>> on occasion and start just before an I-frame so it should start
>> quickly on occasion.
>>
>> Cheers,
>>      Paul.
>
> Recording options in mythtvsetup allows 'Wait for SEQ start', which
> might help if that /is/ the problem - and if it does what I think it
> means...

Well I've got that checked on my system (and assume I always have had, 
certainly recently anyway).

So it doesn't appear that is the problem, or SEQ start doesn't mean wait 
for an I-frame...?

Rob.