Opened 10 years ago

Last modified 9 years ago

#709 reopened enhancement

Dolby pro logic IIx and IIz downmixing

Reported by: dE_logics Owned by:
Priority: wish Component: swresample
Version: git-master Keywords:
Cc: Blocked By:
Blocking: Reproduced by developer: yes
Analyzed by developer: no

Description

ffmpeg, currently when down mixing multi channel audio, does it in a very simple way.

As an enhancement, it should support Dolby pro logic IIz encoding to encode 5.1 or 7.1 to stereo (pro logic II, pro logic IIx respectively) or 9.1 audio to 5.1 or 7.1 (pro logic IIz).

Change History (6)

comment:1 by Carl Eugen Hoyos, 10 years ago

Component: FFmpegswresample
Reproduced by developer: set
Status: newopen

comment:2 by Elon Musk, 9 years ago

Resolution: fixed
Status: openclosed

I belive this have been implemented in libswresample as:

-matrix_encoding   <int>        ....A. set matrixed stereo encoding (from 0 to 2)
   none                         ....A. select none
   dolby                        ....A. select Dolby
   dplii                        ....A. select Dolby Pro Logic II

Please reopen if you think it is not.

Last edited 9 years ago by Carl Eugen Hoyos (previous) (diff)

comment:3 by Carl Eugen Hoyos, 9 years ago

Pro logic IIz is definitely not supported, but afaict 9.1 is generally not supported by FFmpeg and I don't think we have any samples.

comment:4 by Carl Eugen Hoyos, 9 years ago

What is missing is Pro Logic IIx 7.1 -> 5.1 down-mixing.

comment:5 by Elon Musk, 9 years ago

Resolution: fixed
Status: closedreopened
Summary: Dolby pro logic IIz encoding.Dolby pro logic IIx and IIz downmixin

comment:6 by Elon Musk, 9 years ago

Summary: Dolby pro logic IIx and IIz downmixinDolby pro logic IIx and IIz downmixing
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