On Tue, Aug 02, 2016 at 01:57:45PM -0700, Yue Shi Lai wrote: > On 08/02/2016 08:40 AM, Paul B Mahol wrote: > > On 8/2/16, Yue Shi Lai <y...@users.sourceforge.net> wrote: > >> - integrated matrix decoder (probably better suited as a separate filter) > > > > This one does what? > > This is an implementation of the steering or active matrix surround > decoder (e.g. Quadraphonic or Dolby Surround). Implemented are 2-to-4, 5 > and 6 channels (the last one is to decode 5.1 into 7.1, either > consumer-type 4 rear/surround or SDDS downmix with 5 front channels). > Active matrix means that there is an active feed-back system suppressing > cross talk for point sources (e.g. Tate DES and ProLogic). I take the > statement from the users list > (https://ffmpeg.org/pipermail/ffmpeg-user/2013-May/015091.html) still > correct, there is no (even passive) matrix decoder in FFmpeg? >
> On a somewhat related matter: I was browsing through the matrix encoder > in libavresample/audio_mix_matrix.c, and possibly rediscovered the bug > in https://trac.ffmpeg.org/ticket/4175 . Also, the 5-channel coefficient > seems to disagrees with Dolby (see the notes I wrote at some point while > editing the Wikipedia section in > https://en.wikipedia.org/wiki/Talk:Dolby_Pro_Logic#Source_of_the_DPLII_encoding_matrix.3F). is this issue also affecting libswresample ? if so i would be very interrested in a patch fixing it or i can try to look into it myself ... thx [...] -- Michael GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB Freedom in capitalist society always remains about the same as it was in ancient Greek republics: Freedom for slave owners. -- Vladimir Lenin
signature.asc
Description: Digital signature
_______________________________________________ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-devel
