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+--- Thread: [IDEA] codec selector (switcher) (/showthread.php?tid=590)
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codec selector (switcher) - kitamura_design - 10-16-2018
Hi,
There was a little problem that audiophile codec conflicts to FFmpeg codec with playback aiff and wav,
so how about to add "codec selector/switcher" section to MPD menu, which can edit codec's enable/disable in mpd.conf via web UI?
Thanks,
kitamura_design
RE: codec selector (switcher) - Tim Curtis - 10-16-2018
I could do that but I think we will be ok with just ffmpeg :-)
RE: codec selector (switcher) - kitamura_design - 10-16-2018
(10-16-2018, 12:01 PM)Tim Curtis Wrote: I could do that but I think we will be ok with just ffmpeg :-)
Yes, we would...
Question: Is it impossible to implement FDK-AAC codec? I heard it is impossible due to its license.
kitamura_design
RE: codec selector (switcher) - Tim Curtis - 10-16-2018
IDK but usually anything from Fraunhofer will be proprietary. Debian/Raspbian includes the faad2 decoder which I think is licensed under GPLv2. https://packages.debian.org/stretch/libfaad2
faad2 is what MPD uses to decode AAC files.
RE: codec selector (switcher) - kitamura_design - 10-17-2018
(10-16-2018, 06:08 PM)Tim Curtis Wrote: IDK but usually anything from Fraunhofer will be proprietary. Debian/Raspbian includes the faad2 decoder which I think is licensed under GPLv2. https://packages.debian.org/stretch/libfaad2
faad2 is what MPD uses to decode AAC files.
I Got If I want to listen the FDK's, I have to build MPD and ffmpeg by myself.
At least, I think the aac codec on ffmpeg provides better sound than faad's.
Would you compare them?
kitamura_design
RE: codec selector (switcher) - Tim Curtis - 10-17-2018
You should be able to specify "no" in the ffmpeg decoder block in /etc/mpd.conf. This should force MPD to use the faad decoder instead of the ffmpec aac decoder for file.aac.
decoder {
plugin "ffmpeg"
enabled "no"
}
RE: codec selector (switcher) - kitamura_design - 10-18-2018
(10-17-2018, 06:44 PM)Tim Curtis Wrote: You should be able to specify "no" in the ffmpeg decoder block in /etc/mpd.conf. This should force MPD to use the faad decoder instead of the ffmpec aac decoder for file.aac.I already did like this;
decoder {
plugin "ffmpeg"
enabled "no"
}
decoder {
plugin "faad"
enabled "no"
}
decoder {
plugin "ffmpeg"
enabled "yes"
}
kitamura_design
RE: codec selector (switcher) - Tim Curtis - 10-18-2018
You can confirm which codec MPD selects by turning on "verbose" logging in /etc/mpd.conf, then restart MPD, then view the log
cat /var/log/mpd/log | grep decoder
RE: codec selector (switcher) - kitamura_design - 10-18-2018
(10-18-2018, 01:00 PM)Tim Curtis Wrote: You can confirm which codec MPD selects by turning on "verbose" logging in /etc/mpd.conf, then restart MPD, then view the log
cat /var/log/mpd/log | grep decoder
Hi,
Would you see below;
Code:
$ cat /var/log/mpd/log | grep decoder
Oct 18 23:03 : ffmpeg/aac: If you heard an audible artifact, there may be a bug in the decoder. Clipped noise gain (-190 -> -100)
Oct 18 23:03 : ffmpeg/aac: If you heard an audible artifact, there may be a bug in the decoder. Clipped noise gain (-190 -> -100)
Oct 18 23:03 : ffmpeg/aac: If you heard an audible artifact, there may be a bug in the decoder. Clipped noise gain (-190 -> -100)
Oct 18 23:03 : ffmpeg/aac: If you heard an audible artifact, there may be a bug in the decoder. Clipped noise gain (-190 -> -100)
Oct 18 23:03 : decoder_thread: probing plugin ffmpeg
Oct 18 23:03 : decoder: audio_format=44100:f:2, seekable=falseLooks ffmpeg/aac is working, but saying there's some bug. However there doesn't appear any clipped noise.
RE: codec selector (switcher) - Tim Curtis - 10-18-2018
I saw different strange lines in the log when I played my test m4a files that MPD determined needed the ffmpeg aac decoder.
Convert the files to FLAC and all will be good :-)