[mythtv-users] 0.25 Howto enable 3D support

Nick Rout nick.rout at gmail.com
Fri Jul 20 22:00:08 UTC 2012

On Sat, Jul 21, 2012 at 3:15 AM, F.B. Parker <fbp.mythtv at gmail.com> wrote:
> Anthony Giggins seven at seven.dorksville.net via mythtv.org wrote:
>> Has anyone got this working? and can you share your playback profile
>> settings?
> I'm coming to this late, but I've just gotten an LG 47LM7600 with "cinema
> 3d". I got some 3d content in the form of .mkv files. In the file name it
> indicated that it was "side-by-side" 3d content. One of them indicated in
> its file name that it was 1080p.
> My mythbox (BE/FE, GT430, Mythbuntu 12.04, MythTV 0.25-fixes, 2-core Athlon
> 64) didn't need any changes to enable 3d display. I just loaded the video
> file up in the FE, started playing it, hit the 3d button on the TV remote,
> selected side-by-side format, and voila!
> 3d.
> Looks great except the OSD is all messed up: basically the OSD stretched
> over twice the width of the screen. Close your right eye to see the left
> half of the OSD and close your left eye to see the right half of the OSD.
> But other than that the 3d looks great.
> So, I repeat: I didn't have to make any changes in MythTV to enable 3d
> display, and other than the messed-up OSD, it works great.

I have the same experience with side by side and mythtv (and xbmc)
with an LG Cinema 3D TV. I am using a revo with ION2.

1080p in this case is only 960x1080 for each  "side" of the picture,
so half the 1920x1080 resolution of a 2D movie. I have seen 3480x1080
encodes but IIRC that is wider than vdpau copes with.

3D Blurays don't encode 3D as side by side though, they have a normal
full format 1920x1080 track, and another stream that is basically the
difference between the left and right eyes. One eye is made up of the
2D stream with the difference track applied. This is obviously far
more space efficient than storing both eyes at  full resolution. Does
mythtv's 3D support cope with this type of encode?

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