avKode - Phonon backend for FFmpeg

[Vlad C.]

Hi Allan,

Thank you for answering my questions. It looks like
you have avKode thoroughly planned out, and I hope it
turns out well.

Vlad


--- Allan Sandfeld Jensen <kde at carewolf.com> wrote:

> On Friday 26 May 2006 21:23, Vlad C. wrote:
> > Here are my questions:
> >
> > 1) Can FFmpeg reliably detect and play all the
> video
> > and audio formats that Xine-lib can (Windows
> media,
> > Quicktime, Real Player, DVD+menu, Audio CD, DivX,
> AAC,
> > AVI, Ogg, Dirac, DVB, etc)? If not, FFmpeg won't
> by
> > itself meet the needs of real-life users.
> >
> I don't really know yet. It meets the requirements
> of MPlayer.
> 
> > 2) Will avKode be simple a glue between FFmpeg and
> > Phonon or will it also be a backend for other
> > libraries like libMAD, libmpeg2, liba52, FAAD2,
> ogle,
> > mpc, and xiph?
> >
> Glue. The rest is not really needed as it is already
> included in FFMPEG.
> 
> > 3) Why don't KDE apps (amaroK, Kaffeine, KMplayer,
> > Codeine, etc) already use FFmpeg directly as a
> > backend? My guess is that's because FFmpeg doesn't
> do
> > everything users need.
> >
> Because it has an unstable and incomplete API. The
> FFMPEG developers are more 
> interested in making cool new decoders and encoders
> than making a stable and 
> usefull interface. One of the projects they proposed
> for SoC was a redesign 
> of libavformat to make it more usefull, basically
> avKode is such a redesign 
> just in a different programming language.
> 
> > 4) Does FFmpeg output sound via ALSA or will it
> need a
> > sound server? If so, how hard will it be to port
> it to
> > Windows, which is the plan for KDE4?
> >
> FFMPEG has poor audio-output. I will improve it
> using technology from aKode. 
> Windows capabilities are irrelevant as Phonon should
> use a DirectX backend on 
> Windows.
> 
> > Xine-lib does everything FFmpeg does (and more!)
> > because Xine-lib combines FFmpeg and the other
> > libraries mentioned above. Furthermore, Xine-lib
> takes
> > care of outputting sound to ALSA. Lastly, Xine-lib
> has
> > a dedicated core of developers who will make sure
> it
> > gets updated. All KDE devs have to do is keep
> Phonon
> > in sync with Xine-lib's API.
> >
> Is that all we have to do? ;) 
> 
> > My goal in sending this email is to encourage you
> to
> > avoid duplicating work. Good luck any way you
> choose
> > to do it!
> >
> I am glad you for you feedback. Please note though I
> consider the project a 
> bit of an experiment. It might end up as not so good
> idea. This is why the 
> SoC project also emphasizes sub-projects (KIO) which
> would also be needed by 
> a Phonon-xine or any other backend. 
> 
> I do not plan to duplicate much work besides what I
> think I can do better, and 
> I am mostly interested in improving the KDE side of
> things.
> 
> 
> `Allan
> 
> _______________________________________________
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> kde-multimedia at kde.org
> https://mail.kde.org/mailman/listinfo/kde-multimedia
> 


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