mirror of https://github.com/mpv-player/mpv
Created audio filters section to replace -af description.
git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@14193 b3059339-0415-0410-9bf9-f77b7e298cf2
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@ -3036,117 +3036,6 @@ Skip FFmpeg's MP3 decoder.
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.PD 1
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.
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.TP
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.B \-af <filter1[=parameter1:parameter2:...],filter2,...>
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Activate a comma separated list of audio filters and their options.
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Also see the audio filters section of the documentation.
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.br
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.I NOTE:
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To get a full list of available audio filters, see \-af help.
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.sp 1
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Available filters are:
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.RSs
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.IPs resample[=srate[:sloppy][:type]]
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Changes the sample rate of the audio stream to an integer srate in Hz.
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It only supports the 16-bit little-endian format.
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With MEncoder, you need to also use \-srate <srate>.
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.IPs lavcresample[=srate[:length[:linear[:count[:cutoff]]]]]
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Changes the sample rate of the audio stream to an integer srate in Hz.
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It only supports the 16-bit little-endian format.
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With MEncoder, you need to also use \-srate <srate>.
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.RSss
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srate: the output sample rate
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.br
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length: length of the filter with respect to the lower sampling rate
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(default: 16)
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.br
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linear: if 1 then filters will be linearly interpolated between polyphase
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entries
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.br
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count: log2 of the number of polyphase entries
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(..., 10->1024, 11->2048, 12->4096, ...)
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(default: 10->1024)
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.br
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cutoff: cutoff frequency (0.0-1.0), default set depending upon filter length
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.REss
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.IPs sweep[=speed]
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sine sweep
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.IPs hrtf
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.br
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Head-related transfer function: Converts multichannel audio to
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2 channel output for headphones, preserving the spatiality of the sound.
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.IPs channels[=nch]
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Change the number of channels to nch output channels.
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If the number of output channels is bigger than the number of input channels
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empty channels are inserted (except when mixing from mono to stereo, then
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the mono channel is repeated in both of the output channels).
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If the number of output channels is smaller than the number of input channels
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the exceeding channels are truncated.
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.IPs format[=bps:f]
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Select the bytes per sample and the format used for output from the
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filter layer.
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The option bps is an integer and denotes Bytes per sample.
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The format f is a string containing a concatenated mix of:
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.br
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alaw, mulaw or imaadpcm
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.br
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float or int
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.br
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unsigned or signed
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.br
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le or be (little- or big-endian)
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.br
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.IPs volume[=v:sc]
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Select the output volume level.
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This filter is not reentrant and can therefore only be enabled once for every
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audio stream.
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.RSss
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v: Sets the desired gain in dB for all channels in the stream
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from -200dB to +60dB (where -200dB mutes the sound
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completely and +60dB equals a gain of 1000).
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.br
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sc: Enable soft clipping.
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.REss
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.IPs pan[=n:l01:l02:...l10:l11:l12:...ln0:ln1:ln2:...]
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Mixes channels arbitrarily, see DOCS/\:HTML/\:en/\:audio.html for details.
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.RSss
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n: number of input channels (1\-6)
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.br
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lij: How much of input channel j is mixed into output channel i.
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.REss
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.IPs sub[=fc:ch]
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Add subwoofer channel.
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.RSss
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fc: cutoff frequency for low-pass filter (20Hz to 300Hz) (default: 60Hz)
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.br
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ch: channel number for the sub-channel
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.REss
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.IPs surround[=d]
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Decoder for matrix encoded surround sound, works on many 2 channel files.
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.RSss
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d: delay time in ms for the rear speakers (0ms to 1000ms) (default: 15ms)
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.REss
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.IPs delay[=ch1:ch2:...]
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Delays the sound output.
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Specify the delay separately for each channel in milliseconds (floating point
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number between 0 and 1000).
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.IPs export[=mmapped_file[:nsamples]]
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Exports the incoming signal to other processes using memory mapping (mmap()).
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.RSss
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mmapped_file: file to map data to (default: ~/.mplayer/\:mplayer-af_export)
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.br
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nsamples: number of samples per channel (default: 512)
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.REss
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.IPs extrastereo[=mul]
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Increases the difference between left and right channels to add some
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sort of "live" effect to playback.
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.RSss
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mul: difference coefficient (default: 2.5)
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.REss
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.IPs volnorm
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Maximizes the volume without distorting the sound.
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.RE
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.
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.TP
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.B \-af-adv <force=(0\-3):list=(filters)> (also see \-af)
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Specify advanced audio filter options:
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.RSs
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@ -3583,6 +3472,167 @@ Can be used to force scaling with \-vf scale.
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.
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.
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.
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.SH "AUDIO FILTERS"
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Audio filters allow you to modify the audio stream and its properties.
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The syntax is:
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.
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.TP
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.B \-af <filter1[=parameter1:parameter2:...],filter2,...>
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Setup a chain of audio filters.
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.PP
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.I NOTE:
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To get a full list of available audio filters, see \-af help.
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.PP
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Available filters are:
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.
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.TP
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.B resample[=srate[:sloppy][:type]]
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Changes the sample rate of the audio stream to an integer srate in Hz.
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It only supports the 16-bit little-endian format.
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With MEncoder, you need to also use \-srate <srate>.
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.
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.TP
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.B lavcresample[=srate[:length[:linear[:count[:cutoff]]]]]
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Changes the sample rate of the audio stream to an integer srate in Hz.
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It only supports the 16-bit little-endian format.
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With MEncoder, you need to also use \-srate <srate>.
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.PD 0
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.RSs
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.IPs srate
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the output sample rate
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.IPs length
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length of the filter with respect to the lower sampling rate (default: 16)
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.IPs linear
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if 1 then filters will be linearly interpolated between polyphase entries
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.IPs count
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log2 of the number of polyphase entries
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(..., 10->1024, 11->2048, 12->4096, ...)
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(default: 10->1024)
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.IPs cutoff
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cutoff frequency (0.0-1.0), default set depending upon filter length
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.RE
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.PD 1
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.
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.TP
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.B sweep[=speed]
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sine sweep
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.
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.TP
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.B hrtf\ \ \
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Head-related transfer function: Converts multichannel audio to
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2 channel output for headphones, preserving the spatiality of the sound.
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.
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.TP
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.B channels[=nch]
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Change the number of channels to nch output channels.
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If the number of output channels is bigger than the number of input channels
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empty channels are inserted (except when mixing from mono to stereo, then
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the mono channel is repeated in both of the output channels).
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If the number of output channels is smaller than the number of input channels
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the exceeding channels are truncated.
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.
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.TP
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.B format[=bps:f]
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Select the bytes per sample and the format used for output from the
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filter layer.
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The option bps is an integer and denotes Bytes per sample.
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The format f is a string containing a concatenated mix of:
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.br
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alaw, mulaw or imaadpcm
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.br
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float or int
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.br
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unsigned or signed
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.br
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le or be (little- or big-endian)
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.br
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.
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.TP
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.B volume[=v:sc]
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Select the output volume level.
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This filter is not reentrant and can therefore only be enabled once for every
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audio stream.
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.PD 0
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.RSs
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.IPs v
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Sets the desired gain in dB for all channels in the stream
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from -200dB to +60dB (where -200dB mutes the sound
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completely and +60dB equals a gain of 1000).
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.IPs sc
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Enable soft clipping.
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.RE
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.PD 1
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.
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.TP
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.B pan[=n:l01:l02:...l10:l11:l12:...ln0:ln1:ln2:...]
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Mixes channels arbitrarily, see DOCS/\:HTML/\:en/\:audio.html for details.
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.PD 0
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.RSs
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.IPs n
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number of input channels (1\-6)
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.IPs lij
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How much of input channel j is mixed into output channel i.
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.RE
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.PD 1
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.
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.TP
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.B sub[=fc:ch]
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Add subwoofer channel.
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.PD 0
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.RSs
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.IPs fc
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cutoff frequency for low-pass filter (20Hz to 300Hz) (default: 60Hz)
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.IPs ch
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channel number for the sub-channel
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.RE
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.PD 1
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.
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.TP
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.B surround[=d]
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Decoder for matrix encoded surround sound, works on many 2 channel files.
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.PD 0
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.RSs
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.IPs d
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delay time in ms for the rear speakers (0ms to 1000ms) (default: 15ms)
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.RE
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.PD 1
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.
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.TP
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.B delay[=ch1:ch2:...]
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Delays the sound output.
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Specify the delay separately for each channel in milliseconds (floating point
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number between 0 and 1000).
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.
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.TP
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.B export[=mmapped_file[:nsamples]]
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Exports the incoming signal to other processes using memory mapping (mmap()).
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.PD 0
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.RSs
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.IPs mmapped_file
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file to map data to (default: ~/.mplayer/\:mplayer-af_export)
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.IPs nsamples
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number of samples per channel (default: 512)
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.RE
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.PD 1
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.
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.TP
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.B extrastereo[=mul]
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Increases the difference between left and right channels to add some
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sort of "live" effect to playback.
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.PD 0
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.RSs
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.IPs mul\ \
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difference coefficient (default: 2.5)
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.RE
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.PD 1
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.
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.TP
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.B volnorm
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Maximizes the volume without distorting the sound.
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.RE
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.
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.
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.
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.SH "VIDEO FILTERS"
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Video filters allow you to modify the video stream and its properties.
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The syntax is:
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