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Thread: Amarok 2.8 Plays Opus Audio, ASX Playlists

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  1. #1
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    Default Amarok 2.8 Plays Opus Audio, ASX Playlists

    Phoronix: Amarok 2.8 Plays Opus Audio, ASX Playlists

    Joining in on the KDE 4.11 release fun this week is the Amarok 2.8 multimedia player release...

    http://www.phoronix.com/vr.php?view=MTQzODY

  2. #2
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    Default I already have a music player that plays .opus, still its good news :)

    Rhythmbox already plays .opus. Amarok is beginning to support it as well is also good news...

  3. #3
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    Quote Originally Posted by powdigsig View Post
    Rhythmbox already plays .opus. Amarok is beginning to support it as well is also good news...
    Amarok could play opus files since ages (when the used phonon backend was compiled with opus support). Only new is: you can now convert other files into opus files & you can now tag opus files

  4. #4
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    It also have visualisations now

    So, how does OPUS compare to OGG?

  5. #5
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    Not bad. I'll have to fix MIDI support in it at some point, once I get around to it.

    Still waiting for that phonon-gstreamer GStreamer 1.0 support, though. That should fix the annoying pause issue with OGGs and MIDIs. Hopefully it will make it into phonon-gstreamer 4.6.4.

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    Quote Originally Posted by Redi44 View Post
    It also have visualisations now

    So, how does OPUS compare to OGG?
    Ogg is a container format at Opus an audio codec with a quite wide use case (low bit rate, high bit rate, speech, music, for lossy connections, for lossless connections, ...). So you could compare it against Ogg Vorbis, but then you have to define the usecase. For example Ogg Vorbis will be a lot worse on low bit rate speech. Or you could compare it against (Ogg) Speex. But speex would be bad for high bitrate music.

    An old test (which includes Ogg Vorbis) for "medioker" bitrate music can be found here: http://listening-tests.hydrogenaudio...c/results.html

    Some more tests can be found at http://www.opus-codec.org/comparison/GoogleTest1.pdf and http://www.opus-codec.org/comparison/GoogleTest2.pdf and http://research.nokia.com/files/publ...Opus_Codec.pdf


    To make it short: it is an extreme amazing codec and the opponents have to go to therapy for years after these tests.

  7. #7
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    Quote Originally Posted by Redi44 View Post
    It also have visualisations now

    So, how does OPUS compare to OGG?
    Opus is a codec, Ogg a container. Opus usually can be found in an Ogg container.

  8. #8
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    Quote Originally Posted by Redi44 View Post
    So, how does OPUS compare to OGG?
    (I assume you're talking about Vorbis, which most people refer to as "Ogg", since that's the file extension that Ogg Vorbis files traditionally have.)

    Since listening tests that compare Opus with Vorbis are always done at low bitrates (64kbps and lower), it is safe to assume that Opus doesn't compete with Vorbis at higher bitrates. Usually you encode your music (or other audio) with Vorbis at something higher than q0 (which ends up being around 64kbps.) Like q4 (~128kbps) or q6 "to be sure" (~192kbps).

    So for ripping your CDs, it would appear that Vorbis is the way to go. I imagine that for streaming though, Opus will be very attractive in the future due to its IETF standardization and excellent low-bitrate performance.

  9. #9
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    Quote Originally Posted by RealNC View Post
    Since listening tests that compare Opus with Vorbis are always done at low bitrates (64kbps and lower), it is safe to assume that Opus doesn't compete with Vorbis at higher bitrates.
    I don't think that is a safe assumption at all. Codecs intended for accurate reproduction tend to be fairly similar at high bitrates, especially recent ones, so it is harder to tease out the differences. Lower bitrates are, therefore, easier to test and more useful for determining which codec is best for cases where your choice of codec actually matters.
    Last edited by TheBlackCat; 08-18-2013 at 06:50 AM.

  10. #10
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    Quote Originally Posted by powdigsig View Post
    Rhythmbox already plays .opus. Amarok is beginning to support it as well is also good news...
    Except Rhythmbox is terrible mess from an UI standpoint.

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