[mythtv-users] Varying data formats during digital reception
Jose Paulo Moitinho de Almeida
moitinho at civil.ist.utl.pt
Tue Nov 6 10:38:28 UTC 2012
On Tuesday 06 November 2012, John Pilkington wrote:
> On 05/11/12 23:26, JP Moitinho de Almeida wrote:
> > On Monday 05 November 2012 18:40:21 John Pilkington wrote:
> >> On 05/11/12 17:46, Jose Paulo Moitinho de Almeida wrote:
> >>>> ...problem is, he has to get the program started before he can use the
> >>>> editor to set the cutpoints...
> >>>>
> >>>> possible if you have sufficient padding before the actual content
> >>>> starts, I suppose. But will the editor fail be
> >>>> cause the format changed, even so?
> >>>
> >>> I am not at home but, effectively, using the editor is not possible.
> >>> Editing those files past that point also hangs the frontend.
> >>>
> >>> But I can work with "tail/head -c" by iteration/bisection of the file,
> >>> until I just capture the zone of the relevant point.
> >>>
> >>> I'll post that tonight.
> >>>
> >>> Regards
> >>>
> >>> ZP
> >>
> >> Or: mv infile.mpg infile.mpg0
> >>
> >> dd bs=1M skip=35 count=40 if=infile.mpg0 of=infile.mpg
> >>
> >> adjust the skip number and see if it plays in Myth, then omit the count.
> >
> > The link has a 10 Mb clip where the format changes. With this short
> > version the frontend gives up without hanging, but the problem is
> > clearly there.
> >
> > http://dl.dropbox.com/u/20086953/myth_samples/12002_20121104214000.mpg
> >
> > (thanks for the dd, I was missing the skip option)
> >
> > Regards
> >
> > ZP
>
> For me vlc plays for 35 sec, mythtv as a recording (overwriting a short
> recording made here) or as a video for about 30 sec until the presenter
> walks on, then returns to the Watch Recordings screen. If that's where
> you see the problem it might be better to have more data after it.
>
> There's a change in aspect ratio just after the yellow countdown, but
> that doesn't seem to be a problem. I didn't notice it initially.
>
> You might find the vlc 'Tools > Codec info' informative.
>
> All in MythTV 0.25.3.
>
> John
>
The problem happens with the aspect ratio change, which played without
problems in 0.25.
After updating to 0.26 the video stops there and then the frontend player
stops. With a longer sample the frontend player takes (much) longer to give
up.
The log is full of "AFD: Unknown decoding error" messages (text written from
memory).
Regards
ZP
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