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-channels description expanded, patch by gabor <gabor@realtime.sk>.

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git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@8177 b3059339-0415-0410-9bf9-f77b7e298cf2
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diego 2002-11-13 01:17:58 +00:00
parent b3044d0feb
commit aa6c5d6e85
1 changed files with 13 additions and 7 deletions
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@ -394,17 +394,23 @@ May be negative.
.
.TP
.B \-channels <number>
Change the number of playback channels.
Change the number of playback channels, defaults to '2' if not specified.
If the number of output channels is bigger than the number of input channels
empty channels are inserted (except mixing from mono to stereo, then the mono
channel is repeated in both of the output channels).
If the number of output channels is smaller than the number of input channels
the exceeding channels are truncated.
empty channels are inserted (unless mixing from mono to stereo, then the mono
channel is repeated in both output channels).
If the number of output channels is smaller than the number of input channels,
results depend on the audio decoder (\-afm).
Mplayer asks the decoder to decode the audio into as many channels as
specified. Now it's up to the decoder to fulfill the requirement. If the
decoder outputs more channels than requested, the exceeding channels are
truncated. This is usually only important when playing videos with AC3 audio
(like DVDs). In that case liba52 does the decoding by default and correctly
downmixes the audio into the requested number of channels.
.I NOTE:
.br
This option is honored by codecs (ac3 only) filters (surround) and ao drivers
(oss at least).
This option is honored by codecs (AC3 only) filters (surround) and ao drivers
(OSS at least).
.br
Available options are: