[mythtv-users] Transcoding to h.264 while staying in Myth?

[Jeremy Jones]

On Fri, Jul 22, 2011 at 11:54 AM, Raymond Wagner <raymond at wagnerrp.com>wrote:

> On Fri, 22 Jul 2011 11:15:23 -0500, Andrew Bernat <abernat at zathras.net>
> wrote:
> > Is there a good mechanism in MythTV to transcode recorded MPEG-2 files
> to
> > h.264 while keeping them "in" MythTV?
> >
> > As background, I am playing around with running XBMC on my iPad as an
> > alternative Myth frontend. I've got XBMC set up and talking to my server
> > just fine, but the recordings play back really choppily. This is
> > undoubtedly due to the recordings being in MPEG-2 (from a OTA HDTV
> > recording card) and the iPad not having hardware acceleration.
>
> The iPad does have hardware acceleration. If it did not, you wouldn't be
> able to play much of anything due to lack of any significant FPU
> performance in the ARM chip.  The iPad's video decoder is the same one
> found in Intel GMA500 units, capable of HD MPEG2 decoding but artificially
> limited by Apple.  The XBMC devs released a version at the beginning of the
> year that uses an undocumented video API that should allow hardware
> accelerated MPEG2.
>
> If you want to transcode due to network throughput or storage constraints
> on the iPad, check out:
> http://www.mythtv.org/wiki/Transcode_wrapper_stub
> Give it the command you want, and configure it as a user job.  It will the
> whatever command you define, delete the old copy of the file, update the
> path and filesize to match the new file, and flush the seektable.
>
>
Here http://www.mythtv.org/wiki/Low_Quality_Transcode is an example of
someone using Mr. Wagners stub listed above, and I have another one I can
post if you are interested.

Jeremy
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