[FFmpeg-trac] #4441(avfilter:closed): support HDCD
FFmpeg
trac at avcodec.org
Fri Jul 1 14:00:46 CEST 2016
#4441: support HDCD
-------------------------------------+------------------------------------
Reporter: calestyo | Owner:
Type: enhancement | Status: closed
Priority: wish | Component: avfilter
Version: git-master | Resolution: fixed
Keywords: hdcd | Blocked By:
Blocking: | Reproduced by developer: 1
Analyzed by developer: 0 |
-------------------------------------+------------------------------------
Comment (by bp0):
There is no documentation, how is this used?
{{{
$ ffmpeg -i HDCD16.flac -af hdcd OUT.wav
}}}
{{{
ffmpeg version N-80801-gc0cb53c Copyright (c) 2000-2016 the FFmpeg
developers
built with gcc 5.3.1 (Ubuntu 5.3.1-14ubuntu2.1) 20160413
configuration: --enable-libfdk-aac --enable-nonfree
libavutil 55. 27.100 / 55. 27.100
libavcodec 57. 48.101 / 57. 48.101
libavformat 57. 40.101 / 57. 40.101
libavdevice 57. 0.102 / 57. 0.102
libavfilter 6. 46.102 / 6. 46.102
libswscale 4. 1.100 / 4. 1.100
libswresample 2. 1.100 / 2. 1.100
Input #0, flac, from 'HDCD16.flac':
Metadata:
ARTIST : Laura Nyro
DATE : 2000
GENRE : Folk
TITLE : Wedding Bell Blues
ALBUM : Time And Love: The Essential Masters [2010 Audio
Fidelity HDCD AFZ 085]
track : 02
ENCODER : Lavf56.31.100
Duration: 00:00:20.00, start: 0.000000, bitrate: 932 kb/s
Stream #0:0: Audio: flac, 44100 Hz, stereo, s16
[wav @ 0x32a4d80] Using AVStream.codec to pass codec parameters to muxers
is deprecated, use AVStream.codecpar instead.
Output #0, wav, to 'OUT.wav':
Metadata:
IART : Laura Nyro
ICRD : 2000
IGNR : Folk
INAM : Wedding Bell Blues
IPRD : Time And Love: The Essential Masters [2010 Audio
Fidelity HDCD AFZ 085]
IPRT : 02
ISFT : Lavf57.40.101
Stream #0:0: Audio: pcm_s16le ([1][0][0][0] / 0x0001), 44100 Hz,
stereo, s16, 1411 kb/s
Metadata:
encoder : Lavc57.48.101 pcm_s16le
Stream mapping:
Stream #0:0 -> #0:0 (flac (native) -> pcm_s16le (native))
Press [q] to stop, [?] for help
size= 3446kB time=00:00:20.00 bitrate=1411.3kbits/s speed= 348x
video:0kB audio:3445kB subtitle:0kB other streams:0kB global headers:0kB
muxing overhead: 0.006973%
}}}
The output is also 16-bit, although a little quieter.
The windows-only binary hdcd.exe that floats around has this to say about
HDCD16.flac (after flac -d)
{{{
HDCD Detected
Decoding Statistics:
Packets Processed : 231
Peak extend : Never enabled
Minimum gain : 0.0dB
Maximum gain : 0.0dB
Transient filter (Unsupported) : Enabled intermittently
}}}
--
Ticket URL: <https://trac.ffmpeg.org/ticket/4441#comment:26>
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