[mythtvnz] Seek issues on currently-recording file

[Steven Ellis]

On Fri, August 28, 2009 10:24 am, Nick Rout wrote:
> On Thu, Aug 27, 2009 at 9:51 PM, Walter Somerville<walter at aaatos.net>
> wrote:
>> On Thu, Aug 27, 2009 at 9:25 PM, Jonathan Hoskin
>> <jonathan.hoskin at gmail.com> wrote:
>>>
>>> I too have always had this issue, since VDPAU started working + 8.10. I
>>> work around it by saving my position before seeking, escape out of
>>> playback, then hit "play from bookmark", then seeking works. After a
>>> few minutes it is no longer accurate however. Otherwise, the down arrow
>>> on my remote jumps ahead 10 minutes, which seems to line up with
>>> ad-breaks on 3 News, so just starting from the beginning again isn't so
>>> hard.
>>> Playing back a recording-in-progress seems to set a reference point on
>>> the head of the recording from the time you start watching, with any
>>> seeks treating this as a fixed end point.
>>> Jonathan
>>
>> That is possible, I guess, but it seems strange that it would do that
>> for H264 only (perhaps other digital? any DVB-S users seeing/not
>> seeing this?), and only while the file is still being written. I
>> haven't looked at the source yet, but I suspect it'll be a bit too
>> complicated to get my head around quickly...
>>
>> Perhaps also of interest would be if anyone is using DVB-T and *not*
>> seeing this?
>>
>> Walter
>
> Mythtv maintains a seektable which it uses for seeking in a recording.
> What does the seektable look like when this is happening? Compare the
> seektable for a recoding in progress and one that has completed
> recording and seeks ok.
>
> In general see here:
>
> http://www.mythtv.org/wiki/Recordedseek_table and
> http://www.mythtv.org/wiki/Repairing_the_Seektable
>
> Also you may get more info on the mythtv users list, theres a lot of
> knowledge on there, especially in relation to myth's inner workings.

I very occasionally see this for DVB-S recordings, and usually pressing
pause and waiting a couple of seconds allows things to sort themselves
out.

I'll have a play with some live DVB-T over the weekend.


--------------------------------------------
Steven Ellis - Technical Director
OpenMedia Limited - The Home of myPVR
email   - steven at openmedia.co.nz
website - http://www.openmedia.co.nz