[mythtv] Playback next steps

David Engel david at istwok.net
Wed Dec 19 16:02:35 UTC 2018


On Wed, Dec 19, 2018 at 07:10:31AM +0000, Mark Kendall wrote:
> On Wed, Dec 19, 2018, 2:52 AM David Engel <david at istwok.net wrote:
> 
> > On Mon, Dec 17, 2018 at 08:20:57PM +0000, Mark Kendall wrote:
> > > I have a patch for the UYVY code ready to go. It will fix the
> > > interlaced chroma issue and the precision problem. It is not at all
> > > invasive. If OpenGLVideo currently works without YV12 or UYVY, it will
> > > work after the change. It effectively removes the custom UYVY code. We
> > > still use UYVY but it is not as densely packed - so there is a larger
> > > texture in video memory but no sampling problem and no need for the
> > > extra filter stage.
> >
> > Mark, the colors are now messed up on my nvidia shield and firetv
> > stick 4k when the YV12 option is not enabled.  It looks like the red
> > and blue are reversed.  I suspect commit 43b64d5c.  The colors are
> > correct when YV12 is enabled and on Linux regardless of the YV12
> > setting.
> >
> > David
> > --
> >
> 
> Sounds like the UV planes are swapped.

Yes, what I figured.

> Must be an issue with the non-mmx packing code - which is the only thing I
> didn't think to check.

Also waht I figured.

> Or perhaps an endianness issue?

All indications are the Shield is little endian so that's probably not
it.

> Sitting on tarmac waiting for delayed flight to leave and won't be back
> until after Christmas - so can't look at it for a few days.

I'll see if I can figure it out.

David
-- 
David Engel
david at istwok.net


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