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felixculpa
n00b
Joined: 11 Oct 2014
Posts: 12
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 Posted: Sat Nov 01, 2014 6:01 am Post subject: Encoding audio from flac - options? |
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| Hi all. I just decided to finally check out Gentoo and possibly transition away from Archlinux. I am liking what I have experienced so far but there are a few issues I hope can be solved before I make the full switch. The main one is in audio encoding, I like to encode lossless music to either vorbis or preferably aac/m4a using aotuv (for vorbis) and a Fraunhofer FDK AAC encoder (fdk-aac-enc AUR package on Arch) but I'm not sure how to install either of these on Gentoo. From what I can tell those are the best options for those two audio formats and if I had to guess they may be in an overlay... would like someone to point me in the right direction. |
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krinn
Watchman
Joined: 02 May 2003
Posts: 7470
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| Posted: Sat Nov 01, 2014 9:27 am Post subject: |
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| Code: | emerge -s aac
...
* media-libs/fdk-aac
Latest version available: 0.1.3
Latest version installed: [ Not Installed ]
Size of files: 1,936 kB
Homepage: http://sourceforge.net/projects/opencore-amr/
Description: Fraunhofer AAC codec library
License: FraunhoferFDK
... |
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Ottre
Tux's lil' helper
Joined: 23 Dec 2012
Posts: 129
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| Posted: Sat Nov 01, 2014 10:15 am Post subject: |
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Hi felixculpa,
You can grab an ebuild for fdk-aac-enc like so:
| Quote: | sudo bash
mkdir -p /usr/overlays/encoding/{metadata,profiles}
echo 'encoding' > /usr/overlays/encoding/profiles/repo_name
echo 'masters = gentoo' > /usr/overlays/encoding/metadata/layout.conf
cat >>/etc/portage/make.conf <<EOF
# order of this array is important, to see overlay priorities, run
# portageq envvar -v PORTAGE_REPOSITORIES
# the higher the number, the higher the priority
PORTDIR_OVERLAY="
/usr/overlays/encoding"
EOF
cd /usr/overlays/encoding
mkdir -p media-sound/fdk-aac-enc
wget -O media-sound/fdk-aac-enc/fdk-aac-enc-9999.ebuild http://gpo.zugaina.org/AJAX/Ebuild/2891246
sed -i 's/${PN}.git/fdkaac.git/' media-sound/fdk-aac-enc/fdk-aac-enc-9999.ebuild
repoman manifest
chown -R portage:portage .
eix-sync -u
exit
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Check the new ebuilds sections of the bugzilla in a couple days, I'll submit an ebuild for one of the point releases that upstream has made. Relying on a live ebuild (pulls the latest code from github) for software that you use on a regular basis is a bad idea. |
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Ant P.
Watchman
Joined: 18 Apr 2009
Posts: 6920
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| Posted: Sat Nov 01, 2014 5:55 pm Post subject: |
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| Add USE=fdk and emerge ffmpeg. |
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Ottre
Tux's lil' helper
Joined: 23 Dec 2012
Posts: 129
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| Posted: Sat Nov 01, 2014 7:00 pm Post subject: |
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| Ant P. wrote: | | Add USE=fdk and emerge ffmpeg. |
That's an option, but it doesn't have as many features as fdk-aac-enc. |
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Ant P.
Watchman
Joined: 18 Apr 2009
Posts: 6920
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| Posted: Sat Nov 01, 2014 7:19 pm Post subject: |
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| Can you explain what's missing, specifically? Am actually curious because I use that combination for streaming/transcoding regularly. |
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Ottre
Tux's lil' helper
Joined: 23 Dec 2012
Posts: 129
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| Posted: Sat Nov 01, 2014 8:11 pm Post subject: |
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| Better iTunes compatibility, better command-line options, mkvmerge doesn't recognise the aac encoder and auto-adjust the audio for you. When I'm encoding a video, I like to manually adjust the audio delay to lipsync for animated content and lipsync + 80ms for film. Using ffmpeg, you have to strip headers to avoid that "feature" of mkvmerge. |
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felixculpa
n00b
Joined: 11 Oct 2014
Posts: 12
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| Posted: Sat Nov 01, 2014 11:12 pm Post subject: |
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| Thanks for the replies. Yes fdk-aac-enc is nice because of it's itunes compatibility and there is just more widespread support for aac than vorbis. I prefer vorbis but unless I want to play music only on my laptop or on a "rockbox"'d DAP I don't have much choice. Though if I wanted to encode ogg vorbis, Is aotuv built into one of the packages like libvorbis? If not that is fine too, I can stick with the fdk-aac-enc ebuild. |
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Ottre
Tux's lil' helper
Joined: 23 Dec 2012
Posts: 129
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| Posted: Sun Nov 02, 2014 12:34 am Post subject: |
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You can search for what package provides a binary using the e-file command, eg "e-file aotuv".
aotuv is not in the db. I don't mind writing an ebuild for it, too, check back here in a couple days. |
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