[mythtv] Ticket #1925: H.264 keyframe detection fixes

[David Shirley]

Well I was using 0.19.1 - but after I ran-up a recent SVN they worked fine.

Although there seem to be a few niggling problems:
* On the live preview (recordings screen) the video gets displaced up
a few pixels.
* Skipping forwards/backwards usually breaks audiosync (ie lip sync is out).

Thats all I have observed at the moment. I used ffmpeg+x264 to convert
one of my MPEG2 records to H264 and quality seemed almost perfect -
about 1/3 size of the original too, but I'm not sure the codec/mythtv
is mature enough to convert all of my recordings just yet.

CPU usage in mplayer (which I assume uses libavcodec same as mythtv)
was quite good - only 30% for a 5000kb/s stream (1440x1088).

Cheers
Dave

On 6/27/06, Tim Jordan <tim at wheresrover.co.uk> wrote:
> do they not just play back through the watch recordings screen?
>
> Regards
>
> Tim
> On 26 Jun 2006, at 04:39, David Shirley wrote:
>
> > Hey guys,
> >
> > I am confused - If I have been transcoding (ffmpeg) MPEG2 files to
> > H264 format how can I get them back into mythtv?
> >
> > mplayer can play them fine without much CPU usage so I dont think I
> > need to worry about CoreAVC.
> >
> > Cheers
> > Dave
> >
> > On 6/26/06, Tim Jordan <tim at wheresrover.co.uk> wrote:
> >> Thanks for you help so far, however this does not work on AMD64 it
> >> errors at the first hurdle with
> >>
> >> ldt_keeper.c:1: error: CPU you selected does not support x86-64
> >> instruction set
> >>
> >> Any ideas
> >>
> >> Tim
> >> On 25 Jun 2006, at 15:45, Alan Nisota wrote:
> >>
> >>> On 6/25/06, Tim Jordan wrote:
> >>>> yes i would be very interested
> >>>>
> >>> Well, there wasn't much to change between the original patch and
> >>> current SVN.
> >>> So use the updated patch here:
> >>> http://www.f-forge.com?d=EvnO0hZt8SskeHDXjNma
> >>>
> >>> And follow the instructions here:
> >>> http://mythtv.org/pipermail/mythtv-dev/2006-April/047052.html
> >>>
> >>> The patch is quite large, but almost all of that is adding in the
> >>> new
> >>> library for emulation.  the patches to avformatdecoder are quite
> >>> reasonable.
> >>>
> >>> Again, the patch needs some cleanup work in order to build nicely
> >>> with
> >>> myth, but it should work ok as is.
> >>>
> >>> BTW, I've only tested CoreAVC beta and 1.0.  There is a newer
> >>> version
> >>> out, which I haven't tested yet, and which may require additional
> >>> work
> >>> to get going.
> >>> _______________________________________________
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> >>> http://mythtv.org/cgi-bin/mailman/listinfo/mythtv-dev
> >>
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