On Wed, 11 Jul 2012, Alex Converse wrote:
On Wed, Jul 11, 2012 at 9:45 AM, Kieran Kunhya <[email protected]> wrote:
On Wed, Jul 11, 2012 at 5:44 PM, Derek Buitenhuis
<[email protected]> wrote:
On 11/07/2012 8:38 AM, Martin Storsjö wrote:
TODO: Are the mpeg2 ones official or specific to the fraunhofer
encoder?
The MPEG-2 ones are "fake." The word profile means very different
things in MPEG-2 and MPEG-4. These are all profiles in the MPEG-2
sense of the word. In MPEG-4 these are audio object types (because it
wouldn't be MPEG-4 if it wasn't all objects and descriptors). MPEG-4
profiles combine lists of AOTs that can be used together. More modern
(and relevant) MPEG-4 profiles (The "AAC Profile" family) map to a
single object type (and 0 or more enhancement object types). The
MPEG-2 "AOTs" used by this encoder are just MPEG-4 AOTs shifted by
127.
They can either by implemented with FF_PROFILEs or with a private
option shifting us into MPEG-2 mode.
Right. Yes, I actually left these out (but apparently forgot to update the
commit message), since I didn't get them to work properly when I tried.
// Martin
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