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options: accept --audio-channels=auto

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This sounds much more intuitive, while "empty" was a bit of a WTF.
This commit is contained in:
wm4 2014-10-30 22:58:17 +01:00
parent 6c469dc9d9
commit 733936f376
2 changed files with 4 additions and 2 deletions
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5
DOCS/man/options.rst
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@ -907,8 +907,9 @@ Audio
lists speaker names, which can be used to express arbitrary channel
layouts (e.g. ``fl-fr-lfe`` is 2.1).
You can use ``--audio-channels=empty`` to disable this. In this case, the AO
use the channel layout as the audio filter chain indicates.
You can use ``--audio-channels=auto`` to disable this. In this case, the AO
use the channel layout as the audio filter chain indicates. (``empty`` is
an accepted obsolete for ``auto``.)
This will also request the channel layout from the decoder. If the decoder
does not support the layout, it will fall back to its native channel layout.

1
audio/chmap.c
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@ -86,6 +86,7 @@ static const char *const std_layout_names[][2] = {
{"7.1(wide-side)", "fl-fr-fc-lfe-flc-frc-sl-sr"},
{"octagonal", "fl-fr-fc-bl-br-bc-sl-sr"},
{"downmix", "dl-dr"},
{"auto", ""}, // not in lavc
{0}
};