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doc/filters: move hdcd documentation from video section to audio section

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Paul B Mahol 2016-08-11 22:21:29 +02:00
parent b5314333de
commit 17eb0042bc
1 changed files with 52 additions and 52 deletions
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doc/filters.texi
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@ -2629,6 +2629,58 @@ Set delay-line interpolation, @var{linear} or @var{quadratic}.
Default is @var{linear}.
@end table
@section hdcd
Decodes High Definition Compatible Digital (HDCD) data. A 16-bit PCM stream with
embedded HDCD codes is expanded into a 20-bit PCM stream.
The filter supports the Peak Extend and Low-level Gain Adjustment features
of HDCD, and detects the Transient Filter flag.
@example
ffmpeg -i HDCD16.flac -af hdcd OUT24.flac
@end example
When using the filter with wav, note the default encoding for wav is 16-bit,
so the resulting 20-bit stream will be truncated back to 16-bit. Use something
like @command{-acodec pcm_s24le} after the filter to get 24-bit PCM output.
@example
ffmpeg -i HDCD16.wav -af hdcd OUT16.wav
ffmpeg -i HDCD16.wav -af hdcd -acodec pcm_s24le OUT24.wav
@end example
The filter accepts the following options:
@table @option
@item process_stereo
Process the stereo channels together. If target_gain does not match between
channels, consider it invalid and use the last valid target_gain.
@item force_pe
Always extend peaks above -3dBFS even if PE isn't signaled.
@item analyze_mode
Replace audio with a solid tone and adjust the amplitude to signal some
specific aspect of the decoding process. The output file can be loaded in
an audio editor alongside the original to aid analysis.
@code{analyze_mode=pe:force_pe=1} can be used to see all samples above the PE level.
Modes are:
@table @samp
@item 0, off
Disabled
@item 1, lle
Gain adjustment level at each sample
@item 2, pe
Samples where peak extend occurs
@item 3, cdt
Samples where the code detect timer is active
@item 4, tgm
Samples where the target gain does not match between channels
@end table
@end table
@section highpass
Apply a high-pass filter with 3dB point frequency.
@ -8402,58 +8454,6 @@ Then, the effect of this Hald CLUT can be visualized with:
ffplay input.mkv -vf "movie=clut.png, [in] haldclut"
@end example
@section hdcd
Decodes High Definition Compatible Digital (HDCD) data. A 16-bit PCM stream with
embedded HDCD codes is expanded into a 20-bit PCM stream.
The filter supports the Peak Extend and Low-level Gain Adjustment features
of HDCD, and detects the Transient Filter flag.
@example
ffmpeg -i HDCD16.flac -af hdcd OUT24.flac
@end example
When using the filter with wav, note the default encoding for wav is 16-bit,
so the resulting 20-bit stream will be truncated back to 16-bit. Use something
like @command{-acodec pcm_s24le} after the filter to get 24-bit PCM output.
@example
ffmpeg -i HDCD16.wav -af hdcd OUT16.wav
ffmpeg -i HDCD16.wav -af hdcd -acodec pcm_s24le OUT24.wav
@end example
The filter accepts the following options:
@table @option
@item process_stereo
Process the stereo channels together. If target_gain does not match between
channels, consider it invalid and use the last valid target_gain.
@item force_pe
Always extend peaks above -3dBFS even if PE isn't signaled.
@item analyze_mode
Replace audio with a solid tone and adjust the amplitude to signal some
specific aspect of the decoding process. The output file can be loaded in
an audio editor alongside the original to aid analysis.
@code{analyze_mode=pe:force_pe=1} can be used to see all samples above the PE level.
Modes are:
@table @samp
@item 0, off
Disabled
@item 1, lle
Gain adjustment level at each sample
@item 2, pe
Samples where peak extend occurs
@item 3, cdt
Samples where the code detect timer is active
@item 4, tgm
Samples where the target gain does not match between channels
@end table
@end table
@section hflip
Flip the input video horizontally.