[Ffmpeg-devel] dts decoding broken?

Uoti Urpala uoti.urpala
Sat Feb 17 00:11:06 CET 2007


On Fri, 2007-02-16 at 23:00 +0000, M?ns Rullg?rd wrote:
> Uoti Urpala <uoti.urpala at pp1.inet.fi> writes:
> > I'm not sure what the exact syntax should be, but adding some field for
> > that (if nothing more complicated) shouldn't be too hard. I also just
> > checked the libdts documentation and it talks about "default behavior,
> > which is to apply the full dynamic range compression as specified in the
> > DTS stream". I'm sure that someone would want an option to turn that off
> > in situations such as a home theater, and since it talks about "as
> > specified in the DTS stream" it's probably not possible to get the same
> > effect by any processing after the decoder.
> 
> All these options are of course desirable.  Yet, none of the are
> currently possible.

I think breaking stereo playback without an option to enable it is bad
as it's still the most common case.

> > but at least ALSA doesn't seem to downmix 6-channel playback
> > properly for headphones by default on my machine.
> 
> Usually, the "default" device does something reasonable.  Is it not
> working for you?

I normally use a hardware device. I tested "default" too, but it seems
to make no difference - both sound like they just cut out the last
channels. I haven't tried to do anything with the ALSA config.





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