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

[John Pilkington]

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...