Re: [GMG-Devel] HTML5 Visualizer

[Deb Nicholson]

Joar, 
I'm also happy to help you get a post together, if a second pair of eyes or help editing would make it less time-consuming. 
Cheers, 
Deb

On Tue, May 1, 2012 at 9:19 PM, Christopher Allan Webber <address@hidden> wrote:

If you have interest in writing such a blogpost, you could write it
directly for the mediagoblin-website repository.  I'd love to have a
team blogpost entry from you about this!  (If you can find time of
course.)

Joar Wandborg <address@hidden> writes:

> Dependency-wise it would be easier to build it client-side since we depend
> on scikits.audiolab to extract the audio data. scikits.audiolab isn't
> packaged for Debian/Ubuntu, and you need the libsnd1-dev package and some
> magic for it to work.
>
> As for a blog post, I do not feel like the player nor the spectrogram code
> is perfect, the audioprocessing.py script
> looks like it was written for the CLI and it does not conform to
> the guidelines described in PEP-8.
>
> We definitively have a good starting point though. The main problem is time,
>

> Persistent hackers with time to spare might find any relevant information in
>
> - https://github.com/jwandborg/mediagoblin/tree/master/mediagoblin/media_types/audio
> - https://github.com/jwandborg/mediagoblin/blob/master/extlib/freesound/audioprocessing.py
> - https://github.com/jwandborg/mediagoblin/blob/master/mediagoblin/templates/mediagoblin/media_displays/audio.html
> - https://github.com/jwandborg/mediagoblin/blob/master/mediagoblin/static/js/audio.js
>
> and as of you reading this email it will be published on the web and
> eventually searchable from the major search engines.
>
> If I get by a bucket of time cheaply or have my priorities thrown about I
> may consider writing a longer and pedgagogically structured post.
>
> Best,
> Joar
>
> On Tue, May 01, 2012 at 05:26:08PM -0700, Rich Jones wrote:
>> Aaaaahhh, okay, if you're just generating it server-side and you have the
>> capacity to do it, that's just as fine as doing it client-side as long as
>> it's Free.
>>
>> This stuff is really interesting to a lot of web-devs right now, you should
>> do a blog post where you annotate how you did this!
>>
>> Well done and good luck,
>>
>> R
>>
>> On Tue, May 1, 2012 at 5:06 PM, Joar Wandborg <address@hidden> wrote:
>>
>> > Whoa, I meant "Hello Rich" :)
>> >
>> > I have this weird keyboard <https://gobblin.se/u/joar/m/mitigating-rsi/> that
>> > I still have to come to terms with.
>> >
>> >
>> > On Wed, May 2, 2012 at 2:04 AM, Joar Wandborg <address@hidden> wrote:
>> >
>> >> Hell Rich,
>> >>
>> >> first off, we do not use any functionality from SoundCloud, but I will
>> >> take it
>> >> as a compliment that you thought so :)
>> >>
>> >> To generate the thumbnails we rely on
>> >>
>> >> https://github.com/jwandborg/mediagoblin/blob/master/extlib/freesound/audioprocessing.py
>> >> which is a script originally authored by a Bram de Jong. I found the
>> >> script
>> >> in the source code of freesound.org and built an audio thumbnailer around
>> >> it
>> >> (
>> >> https://github.com/jwandborg/mediagoblin/blob/master/mediagoblin/media_types/audio/transcoders.py#L64
>> >> ).
>> >>
>> >> A refractor/rewrite of the audioprocessing code has been initiated, but
>> >> other things have come to be prioritized over it. I have some work done
>> >> in a
>> >> local branch which I may share if requested.
>> >>
>> >> As for the link
>> >> (http://gun.io/blog/client-side-_javascript_-audio-waveform-visualizer/) it
>> >> only works in Chrome and not in Firefox Nightly 15.0a1 (2012-04-25) nor
>> >> Iceweasel 11, the problem seems to be the webkitAudioContext not being
>> >> present.
>> >>
>> >> I like the philosophy of rendering it client-side and I have been looking
>> >> into generating the spectrogram client-side although I found the main
>> >> obstacle to be that not all browsers provide an API method to access the
>> >> raw audio data. Thus I resorted to server-side processing.
>> >>
>> >> /Joar
>> >>
>> >> On Tue, May 01, 2012 at 04:31:19PM -0700, Rich Jones wrote:
>> >> > Oh, and you can try it out here:
>> >> > http://gun.io/blog/client-side-_javascript_-audio-waveform-visualizer/
>> >> >
>> >> > It only worked 100% in Chrome last time I tried it, but I think it might
>> >> > work in the most recent FF.
>> >> >
>> >> > R
>> >> >
>> >> > On Tue, May 1, 2012 at 4:29 PM, Rich Jones <address@hidden> wrote:
>> >> >
>> >> > > Saw in the screenshots of the new release you're using Soundcloud to
>> >> > > visualize your tracks.
>> >> > >
>> >> > > If you're interested, I've got a pure-JS client-solution solution
>> >> that may
>> >> > > suite your needs better (and provide a more Free alternative)
>> >> > >
>> >> > > Check it out: https://github.com/Gunio/browser-waveform
>> >> > >
>> >> > > -R
>> >> > >
>> >>
>> >> > _______________________________________________
>> >> > devel mailing list
>> >> > address@hidden
>> >> > http://lists.mediagoblin.org/listinfo/devel
>> >>
>> >>
>> >
>> >
>> > --
>> > Joar Wandborg
>> > wandborg.se
>> >
>> >
>> > _______________________________________________
>> > devel mailing list
>> > address@hidden
>> > http://lists.mediagoblin.org/listinfo/devel
>> >
>> >
>
>> _______________________________________________
>> devel mailing list
>> address@hidden
>> http://lists.mediagoblin.org/listinfo/devel
>
> _______________________________________________
> devel mailing list
> address@hidden
> http://lists.mediagoblin.org/listinfo/devel
_______________________________________________
devel mailing list
address@hidden
http://lists.mediagoblin.org/listinfo/devel