Using VideoLAN client as an embedded component
sam at zoy.org
Thu Jun 27 23:58:25 CEST 2002
On Thu, Jun 27, 2002, Rajas Sambhare wrote:
> 1. How feasible will it be to use VideoLAN as an embedded component?
Pretty easy real soon now. The 0.5.x versions of the VideoLAN client
(currently only in CVS) will provide a library with a simple API for
embedding. I'm currently working on a Mozilla plugin  which does
> I don't really know VideoLAN very well to be able to make such an
> analysis. The features we need are:
> a. Start, stop, pause, seek (the pause and seek are crucial for
There are hooks for this. The current player might not please you
terribly because there is a little delay (due to buffering issues)
before the movie really pauses or seeks, but I think this can be worked
> b. MPEG1, MPEG2 support, VideoLAN seems to have this.
Yes. No problem here.
> c. Audio extraction for the waveform display.
This will require some work. vlc already has a simple plugin which
displays a waveform  but it's really a quick hack.
> d. Resizable video, including full screen playback.
No problem here, vlc does arbitrary scaling and full screen.
> 2. Currently the embedding approach we seem to be thinking of is simply
> to write a higher level wrapper API which encapsulates the video
> component. Any suggestions?
Seems reasonable to me. The libvlc API currently looks like this:
* vlc_create, vlc_init, vlc_close, vlc_destroy for system stuff
* vlc_add_target, vlc_run, vlc_stop for playback
I am currently adding stop, pause, play controls to this API for
an eye on the CVS checkins if you want to see how it evolves.
> 3. Finally how well will VideoLAN integrate with wxPython (and
I'm afraid I cannot answer you right now. vlc is completely interface
agnostic, so wxWindows shouldn't be a problem. And I don't expect any
big issues with writing a wxPython wrapper for the forthcoming libvlc.
But you never know ... vlc makes extensive use of threads, which
might cause unexpected problems if wxWindows for instance isn't thread
safe. I got a lot of problems with Motif.
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