[mythtv-users] AC3 software decoding too quiet

[John]

On 29/11/10 11:43, Jean-Yves Avenard wrote:
> Hi
>
> On 17 November 2010 05:20, Thomas Börkel<thomas at boerkel.de>  wrote:
>    
>> Thanks! Does that mean, it is fixed by this patch or otherwise in 0.24?
>>
>> Currently, I have my own patch, which just makes MP2/3 the default format.
>>      
> Not a fix as such.
>
> But I've added the option to force the use of Myth's own downmixer for
> all codecs.
>
> By default, myth let ffmpeg do the downmixing for all Dolby codec, as
> they can very efficiently downmixed 5.1 AC3 to 2.0 AC3 (it's part of
> the codec specification).
>
> When active, the 5.1 audio is decoded then downmixed to stereo. This
> downmixer doesn't have the volume issues has the ffmpeg's one.
>
> On my system, listening to 5.1 AC3 passthrough, or the downmixed one
> on a stereo system sounds just as loud that way.
>
> http://svn.mythtv.org/trac/changeset/27370
>
> JY
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>    
Excellent, that volume change between TV and Videos with Dolby has been 
a long term pain. Is this likely to be backported to 0.24-fixes ?