Opened 5 years ago

Last modified 4 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 Changed 5 years ago by cehoyos

  • Component changed from FFmpeg to swresample
  • Reproduced by developer set
  • Status changed from new to open

comment:2 Changed 4 years ago by richardpl

  • Resolution set to fixed
  • Status changed from open to closed

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.

Version 0, edited 4 years ago by richardpl (next)

comment:3 Changed 4 years ago by cehoyos

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 Changed 4 years ago by cehoyos

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

comment:5 Changed 4 years ago by richardpl

  • Resolution fixed deleted
  • Status changed from closed to reopened
  • Summary changed from Dolby pro logic IIz encoding. to Dolby pro logic IIx and IIz downmixin

comment:6 Changed 4 years ago by richardpl

  • Summary changed from Dolby pro logic IIx and IIz downmixin to Dolby pro logic IIx and IIz downmixing
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