[mythtv-users] DVB, 540P Slow Motion?

[Dave Hofstra]

I have the exact same problem with 720p in the US.   I have a pcHDTV 3000.
Using 0.18.1 and the 1.6 V4L driver, this 720p station would come in fluid
motion, but only if I started on the 720p channel (i.e. if I started livetv
on 1080i and switched to 720p, it would be slow framerate).  Now in 0.19 and
the DVB drivers, the 720p station will only display with the slow
framerate.  The problem you mention sounds exactly like what I am seeing....
audio is in sync, but video is displaying something like 10fps.

This is killing me because I really was looking forward to DVB solving all
my HD problems....   I am outputting to a 540p modeline, and was going to
try a 1080i modeline this weekend just to see if it is a scaling problem or
something.

On 3/3/06, Matthew Moore <myth-mail at matt-sam.com> wrote:
>
> Hi all,
>
> As an Australian user, I am somewhat stuck with some of our networks
> broadcasting 540P and calling it "high definition".  The resolution is of
> little interest to me, but I want the Dolby Digital broadcast in the
> stream!
>
> My problem is that my Myth front end doen't seem to like it.
>
> On 1080i things work perfectly - smooth and sharp image; no major
> glitches.  On those stations with a 540p broadcast, it runs in slow
> motion.  Audio is fine, video plays like it's playing at half the frame
> rate.  It's almost like Myth is attempting to compensate for my interlaced
> resolution I am outputting to my television.
>
> There was a time that these stations performed perfectly but certainly in
> 0.18.1 and 0.19 it works as described above.  I note that it was raised by
> a couple of people around the time of the big dvb patch here:
>
> http://www.gossamer-threads.com/lists/mythtv/dev/104050?search_string=seven%20hd%20slow;#104050
> but I can't seem to see any resolution (no pun intended).
>
> I'm running a split front and backend system on 0.19.  My front end
> outputs via an NVIDIA 6600GT, a customised 1080i modeline @ PAL timings
> (not sure if this matters, but thought I should mention it), I run FC4 and
> am up-to-date with packages.
>
> Does anyone else have problems with 576P broadcasts, or can anyone suggest
> where to start debugging?
>
> TIA,
>
> Matt.
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