[FFmpeg-devel] Blu Ray drive donation
Carl Eugen Hoyos
Mon Mar 16 23:48:24 CET 2009
Justin Ruggles <justin.ruggles <at> gmail.com> writes:
> E-AC-3 using spectral extension is not supported yet (I just haven't had
> the motivation to clean up the patch). I've only come across 2 samples
> which use this, and they are both from HD-DVDs.
Could you note this somewhere so it is not forgotten?
> Apparently there are some streams that mix regular AC-3 and TrueHD in
> the same substream.
I meant those, thank you.
> It seems the TrueHD frame is placed after the AC-3
> frame. I'm not sure if it provides additional channels or is a lossless
> version of what's in the AC-3. My first guess is that it's the same
> audio encoded twice because TrueHD is an optional codec in Blu-ray, but
> AC-3 is mandatory. Maybe it's both..lossless version of 6 channels plus
> extra channels. Anyone else know more about this? Or better yet, have
> some samples?
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