[mythtv-users] alsa 1.0.24, 0.24.2-fixes, ubuntu lucid, hdmi audio, AC3/DTS not working

[Steven Adeff]

On Tue, Feb 21, 2012 at 12:33 AM, Jean-Yves Avenard <jyavenard at gmail.com> wrote:
> On 21 February 2012 15:31, Steven Adeff <adeffs.mythtv at gmail.com> wrote:
>> ok, for some reason internal volume control became enabled ("reenc 1")
>> with the PCM audio volume set to 0 (I've never had this enabled or
>> changed the volumes), which was forcing myth to reencode the ac3 and I
>> think that is what was causing the receiver to not be able to
>> recognize the other channels for whatever reason, even when it said it
>> was sending 6ch ac3.
>
> 0.25 actually read the ELD data of your device to find out if it can
> really do 6 channels PCM..

very cool, that will make many people's lives much easier! excellent work JYA!

> If you post the ELD data I indicated earlier, I will be able to tell
> you what your amplifier can do..

Like I said, I'm sure it can do this, as it worked with mplayer. For
whatever reason the re-encoding that MythTV does internally does not
apparently work however.


>> once I noticed that (I normally just keep hitting next and don't look
>> at it) and disabled it, it worked right away for everything
>> (recordings, videos, and mythmusic including 24bit 88.2Khz music).
>>
>> i guess there's some odd code in there that resets the output channels
>> and this internal volume control without the user doing it, hopefully
>> that's fixed for 0.25
>
> There's nothing to fix there... the settings screen gets adjusted
> according to the audio device you have set.
> So say you are on ALSA:iec958 and you move to ALSA:front which is stereo only
> The speaker config will change to stereo.  if you do move back to
> iec958 instead, it will not go back to 5.1

we never did that, we only switched between the various HDMI inputs.
As well, why would changing the output device cause the internal audio
controls section to become enabled?

-- 
Steve
http://www.mythtv.org/wiki/User:Steveadeff
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