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Diffstat (limited to 'doc/filters.texi')
| -rw-r--r-- | doc/filters.texi | 19 |
1 files changed, 17 insertions, 2 deletions
diff --git a/doc/filters.texi b/doc/filters.texi index 3cf3d7ce89..a8c2c8799d 100644 --- a/doc/filters.texi +++ b/doc/filters.texi @@ -8427,8 +8427,23 @@ ffplay input.mkv -vf "movie=clut.png, [in] haldclut" @section hdcd -Decodes high definition audio cd data. 16-Bit PCM stream containing hdcd flags -is converted to 20-bit PCM stream. +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 @section hflip |