[mythtv-users] UK DVB-T radio timing problems since 0.25

[John Pilkington]

On 14/05/12 10:36, John Veness wrote:
> On 11/05/2012 21:33, Rick Lane wrote:
>> I'm also seeing this. Usually my radio recordings are just extracted to
>> mp3 rather than listened to directly on a mythfrontend so I hadn't
>> noticed it.
>>
>> I've played back a couple of recordings via the frontend and see the
>> same thing. One recording is 38.00 minutes and the internal player stops
>> at 31.38. Another recording of 19.00 exits at 15.53. MHEG being disabled
>> makes no difference.
>>
>> If its relevant, I took a look at the 'playback data' available via the
>> playback menu and compared a radio broadcast to a normal one. The normal
>> one displays FPS: 25.06±0.01, video: 720x576 at 25.00fps, while the radio
>> broadcast displays FPS:30.03±0.01, video: 0x0 at 29.97fps.
>>
>> Cheers,
>> Rick
>
> Hi Rick,
>
> Thanks for confirming. I notice that 31.38 is 25/30ths of 38.00, and
> 15.53 is 25/30ths of 19.00.
>
> I've found that I've actually described the problem incorrectly twice
> now, earlier in this thread (it turns out due to confusions with
> skipping and edit points)!
>
> I don't know if you're seeing the same thing, but for me, if I play back
> one of these recordings and don't press any buttons, everything plays
> back fine. It's only if I skip that things go wrong. For example, if I
> skip forward 10 minutes, the OSD will say that I'm 10 minutes into the
> recording, but actually it's more like 12. If I skip forward another 10
> minutes, the OSD will say that I'm 20 minutes into the recording, but
> actually it's more like 24. I think there also might be a problem with
> edit points, but I haven't investigated fully yet.
>
> I intend to file a bug and host a recording file somewhere for devs to
> analyse, but haven't got around to it yet. If a dev is reading this and
> has worked out what's going on, that would be great.
>
> Cheers,
>
> John
>
I see something else that might be related to this when trying to edit 
HD dvb-t2 recordings.  If I try to resume play from a point a few 
minutes from the end it just exits.  If I have a cut defined earlier it 
will resume as expected and play to the end.  I haven't really tried to 
define the exact circumstances yet.  And I opened a ticket some time ago 
about previewgen assuming a 30fps framerate. That got won'tfixed. It's 
unimportant but perhaps related, too.

John P


John P