[FFmpeg-trac] #4441(undetermined:new): support HDCD
FFmpeg
trac at avcodec.org
Tue Apr 7 06:25:13 CEST 2015
#4441: support HDCD
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Reporter: calestyo | Type:
Status: new | enhancement
Component: | Priority: wish
undetermined | Version:
Keywords: | unspecified
Blocking: | Blocked By:
Analyzed by developer: 0 | Reproduced by developer: 0
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Hey.
(Thought I'd have reported that here before, but I cannot find the ticket
anymore)
AFAICS, ffmpeg does not support HDCD content (i.e. CD-DAs that use that
encoding or WAVs extracted from such CD-DAs and in which the necessary
data should still be present).
Even though HDCD is a dead format now (well more or less, according to
some source there are allegedly still up to 4k titles available... not
much) it would be nice if a decoder could be added, since people have CDs
respectively rips thereof in this format and it would be nice if they have
a way to listen to it even in 20 years or so.
Apparently there is source code for a decoder available under an open
source license, so that might be taken and adapted as necessary:
https://github.com/kode54/foo_hdcd
Many information about HDCDs is floating around the web, e.g.:
https://forum.dbpoweramp.com/showthread.php?27540-Ripping-HDCDs-Best-
practices
In any case note, that HDCD doesn't only apply to CDs (as mentioned
above).
Further, it's apparently the case there are several features in HDCD (some
of this is explained above) and that just the stream indicator for "HDCD
encoding present" alone doesn't tell much...
Also it and the features as well can vary from track to track.
Best wishes,
Chris.
--
Ticket URL: <https://trac.ffmpeg.org/ticket/4441>
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