[mythtv-users] UPnP, DLNA and Aspect Ratio

[Andre]

On 8 Jun 2011, at 13:46, Mark Lord wrote:

> On 11-06-07 04:17 AM, Nick Rout wrote:
>> On Tue, May 17, 2011 at 12:03 AM, David Watkins <watkinshome at gmail.com> wrote:
>>> Having recently succeeded in recording some HD DVB-T2 material into
>>> MythTV, I've treated myself to my first HD Television:  an LG32LE4900.
>>> 
>>> Lots of new features to play with, one of which is DLNA.
>>> 
>>> The TV finds my MythTV box, and serves up and plays Myth's TV
>>> recordings quite well,  but it plays them back in 4:3 format, with
>>> black bars down the sides.  The TV offers two screen sizes during
>>> playback: "Full" and "Original", but both give the same 4:3 aspect
>>> ratio.
>>> 
>>> Now as far as I can tell this is something the TV should sort out
>>> rather than MythTV (I'm going to try and play the same files via the
>>> USB interface), but I thought I'd ask....
>>> 
>>> Is there anything within MythTV UPnP, that can be tweaked, that would
>>> affect the aspect ratio with which the DLNA client plays the video?
>>> I've browsed through the MythTV UPnP wiki pages but can't see anything
>>> that looks particularly relevant.
>>> 
>>> When playing the same files via the Myth frontend they play in 16:9 format.
>> 
>> same on my LG 55LW6500, but I prefer a real frontend anyway.
> 
> The Samsung LCD here seems to get the aspect ratios correct over DLNA
> from the mythtv box.  Playback is incredibly smooth too (120HZ) over DLNA
> compared with VDPAU (which otherwise looks excellent itself).

This is the big advantage of DLNA playback, the TV gets to use all it's decoding tricks & tweaks, some good some bad.


> 
> The Samsung UI is crap though, so I use it only for files that Mythtv
> totally chokes on.

Still good to know that it plays myth recordings properly, what are your sources? I'm guessing US mpeg2 HD as you mention 120hz?

Would be good to know if it copes properly with Euro 16:9/4:3 SDTV mid programme switching.

The is a problem with Samsung playback of Euro frame rate streamed material, it plays all 25/50 frame video at 60Hz, haven't had chance to see if the same problem occurs over DLNA.

Andre