[mythtv] [mythtv-commits] Ticket #5351: Internal player can't downmix 5.1 AAC properly

[Paul Kendall]

On Thu, Sep 2, 2010 at 4:47 PM, Robert McNamara
<robert.mcnamara at gmail.com>wrote:

> On Wed, Sep 1, 2010 at 9:42 PM, Steven Ellis <steven at openmedia.co.nz>
> wrote:
> >
> > On Sun, August 15, 2010 2:12 am, Stuart Morgan wrote:
> >> On Saturday 14 Aug 2010 15:00:40 Raymond Wagner wrote:
> >>>   On 8/14/2010 05:22, MythTV wrote:
> >>> >   I have the same problem as specified in the original ticket. I
> >>> couldn't
> >>> >   work out why some Blu Ray rips were not playing back correctly and
> >>> >   others were. The only difference is 5.1 downmixing. I am using
> >>> >   0.23+fixes on the Mythbuntu distribution. I'm not sure what extra
> >>> >   information is required to help troubleshoot this issue.
> >>>
> >>> It's a known issue with 5.1 AAC playback. We use an external decoder
> for
> >>> AAC playback, instead of the normal ffmpeg libraries, as it's needed
> for
> >>> LATM support used by some broadcasters. One of the devs is working on
> >>> support to submit upstream to ffmpeg, which will hopefully get back to
> >>> MythTV some time in the 0.25 cycle.
> >>
> >> Alternatively you can compile without that external lib (libfaad) and
> use
> >> the
> >> build in aac decoding, just keeping in mind that LATM isn't supported.
> >
> > The lack of LATM is going to break things for broadcast TV here in NZ.
> > They use HE-AACv2 with LATM for the audio on most of their terrestrial
> > channels.
> >
> > Steve
> >
>
> Then users in NZ should not use trunk in production.  Just because
> it's not there now doesn't mean we don't intend to have LATM support
> tehre for .24.
>
> Robert
>

Exactly,
Janne has said that LATM will be there for the release of 0.24.
We will just have to wait. Although, it would be nice to have it before the
bug squashing in a few weeks time :-)

Cheers,
Paul
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