> If you pass --genre multiple times, it will actually encode multiple GENRE tags in the file. Not sure how many players will properly handle such a thing, though (my prediction: not many, though I think VLC will concatenate them into a comma-separated list).My mistake, I didn't read the man page carefully enough, which does state this:> Set the genre comment field to genre. This option may be specified multiple times to tag a track with multiple overlapping genres.> "Paper Lights" from <http://magnatune.com/artists/albums/ehren-lines/> has been prominently featured at <http://www.opus-codec.org/examples/> and articles like <https://hacks.mozilla.org/2012/07/firefox-beta-15-supports-the-new-opus-audio-format/>,Great!> etc. Sadly, when I "Click to play a song" on the Magnatune page, though, it tries to use Flash (which I don't have installed).Apologies for this -- I'm using the soundmanager2 javascript library, and am tied to its behavior. I believe that if flash is not installed, it is supposed to use javascript-based playback, so something is odd. However, flash blockers cause problems, as well as older browsers that don't have html-based audio playback features. If you follow up with me via personal email, I'll be happy to try to debug the situation with you. I wasn't sure what bit rate was appropriate for "Very high quality" with opus, i.e. something that was "commonly indistinguishable from a WAV file". Any advice on that is appreciated. -john
On 13-09-19 11:26 PM, John Buckman wrote:> My mistake, I didn't read the man page carefully enough, which does state this: >> Set the genre comment field to genre. This option may be specified multiple times to tag a track with multiple overlapping genres.No mistake. It didn't say that until yesterday afternoon. :-)>> etc. Sadly, when I "Click to play a song" on the Magnatune page, though, it tries to use Flash (which I don't have installed).FWIW, this does seem to work for me on Firefox nightly (on linux, without flash). Much nicer than the old site design.> I wasn't sure what bit rate was appropriate for "Very high quality" with opus, i.e. something that was "commonly indistinguishable from a WAV file". Any advice on that is appreciated.That's a very hard question, as I'm sure you're aware. Of course any lossy compression is distinguishable from the original, and results depend a lot on the music genre. But in my rough experience: 64 kbps Opus is transparent for many samples with cheap headphones. 128 kbps Opus is transparent for almost any sample with good headphones. I'd probably use 192 kbps Opus for 'very high quality' and the default (96 kbps for coupled stereo) for 'high quality'. Do you plan to offer opus versions as individual songs for download or playlist use? -r
> I wasn't sure what bit rate was appropriate for "Very high quality" > with opus, i.e. something that was "commonly indistinguishable from a > WAV file". Any advice on that is appreciated.I would tend to recommend using around the same bitrate for Opus as you'd be using for Vorbis. Cheers, Jean-Marc
Flashblockers have recently gone to blocking audio and video tags by default as well. On Fri, Sep 20, 2013 at 2:26 AM, John Buckman <john at magnatune.com> wrote:>> If you pass --genre multiple times, it will actually encode multiple GENRE tags in the file. Not sure how many players will properly handle such a thing, though (my prediction: not many, though I think VLC will concatenate them into a comma-separated list). > > My mistake, I didn't read the man page carefully enough, which does state this: >> Set the genre comment field to genre. This option may be specified multiple times to tag a track with multiple overlapping genres. > >> "Paper Lights" from <http://magnatune.com/artists/albums/ehren-lines/> has been prominently featured at <http://www.opus-codec.org/examples/> and articles like <https://hacks.mozilla.org/2012/07/firefox-beta-15-supports-the-new-opus-audio-format/>, > > Great! > >> etc. Sadly, when I "Click to play a song" on the Magnatune page, though, it tries to use Flash (which I don't have installed). > > Apologies for this -- I'm using the soundmanager2 javascript library, and am tied to its behavior. > > I believe that if flash is not installed, it is supposed to use javascript-based playback, so something is odd. However, flash blockers cause problems, as well as older browsers that don't have html-based audio playback features. > > If you follow up with me via personal email, I'll be happy to try to debug the situation with you. > > I wasn't sure what bit rate was appropriate for "Very high quality" with opus, i.e. something that was "commonly indistinguishable from a WAV file". Any advice on that is appreciated. > > -john > > _______________________________________________ > opus mailing list > opus at xiph.org > http://lists.xiph.org/mailman/listinfo/opus
On Sep 20, 2013, at 1:19 PM, Jean-Marc Valin <jmvalin at jmvalin.ca> wrote:>> I wasn't sure what bit rate was appropriate for "Very high quality" >> with opus, i.e. something that was "commonly indistinguishable from a >> WAV file". Any advice on that is appreciated. > > I would tend to recommend using around the same bitrate for Opus as > you'd be using for Vorbis.Good suggestion, but it seems to me that the measurement systems between the different encoders are different. With oggenc, we're using a "-q 6" Whereas for opusenc we're using "--bitrate 128" It's not a serious problem, I can "just use my ears" to decide when the quality seems good enough. -john
> 64 kbps Opus is transparent for many samples with cheap headphones. > 128 kbps Opus is transparent for almost any sample with good headphones. > > I'd probably use 192 kbps Opus for 'very high quality' and the default > (96 kbps for coupled stereo) for 'high quality'.Thanks for those suggestions.> Do you plan to offer opus versions as individual songs for download or > playlist use?Yes, though currently I default to OGG when supported, and will move to using OPUS when it's supported, as the audio quality is even a bit better. Getting ZIP files of all our albums, with the right metadata, was a good 1st step, and a good way to debug whatever problems might arise (ie, my doing the metadata tagging incorrectly). As to playlists -- the way it'll work is that the "most open" audio format you support will be used by default, in this order: opus, ogg, mp3. -john