[vlc] JVLC event support

[Keith Kyzivat]

I've currently put more event support additions on the back burner, however
I do have some finished event support that I've been using (and works good)
that should probably be pushed up to VLC folks -- That support is event
support for the MediaDescriptor object.  When I get a chance, I'll supply a
patch and send it to the list here.
Right now I've just been working on being able to build latest VLC code for
windows using cross-compiler.  See my notes on the
talk<http://wiki.videolan.org/Talk:Win32Compile>page of the
Win32Compile <http://wiki.videolan.org/Win32Compile> article in the wiki if
you're interested.

On Thu, Oct 9, 2008 at 3:45 AM, Javier Gálvez Guerrero <
javier.galvez.guerrero at gmail.com> wrote:

> Any feedback for these JVLC events support? I've been playing with media
> player's events and they seem the root of all playlists problems, aren't
> they? It seems a matter of "connection" between libvlc and JNA used in JVLC,
> but I'm not sure about it as I am not a guru programmer =).
>
> Any foreseen future work on this?
>
> Regards,
> Javi
>
> 2008/9/12 Keith Kyzivat <kkyzivat at tripleplayint.com>
>
>> This is primarily for Littlejohn, however I want to keep this on-list so
>> everyone can see.
>>
>> I've been using JVLC for java-based video playback with overlay (doing
>> actual rendering in java -- i.e. no hardware rendering),
>> however due to some fundamentals of Mpeg2 transport streams, I have now
>> had to use jvlc/vlc to change the encapsulation
>> format of videos from transport streams to program streams.
>>
>> I do have a set of classes and a unit test put together that converts a
>> video to the Mpeg2 Program Stream encapsulation format now, providing
>> feedback and cancellation using a swing ProgressMonitor, however I have
>> issues when reaching the end of the conversion.  Specifically, I never
>> receive a media player "endReached" event.  I've tried a number of things I
>> could do that xtophe on the IRC channel suggested, however none of the ones
>> I've tried have worked properly.
>>
>> Here are the suggestions I've received from xtophe:
>>
>> Ones I've tried, but have failed to fix the problem:
>>
>>    - Try individual mrl option instead of global for sout specifier (":"
>>    instead of "--") (because '--sout' might keep the stream open for another
>>    item) -- TRIED, FAILED
>>    - Use the "--no-sout-keep" option -- TRIED, FAILED
>>
>>
>> Ones I have not tried yet, as I am not using MediaList/MediaListPlayer or
>> PlayList, since they have no event support.
>>
>>    - Add the "vlc://quit" mrl to the end of the playlist
>>    - Add the "vlc://nop" mrl to the end of the playlist
>>
>>
>> Since I'd like asynchronous playback with callbacks when the conversion is
>> finished, I'm interested to get event support added to MediaListPlayer, and
>> to complete the asynchronous play methods (for which there exists methods,
>> but it doesn't behave as the signature suggests right now, just ignoring the
>> boolean synchronous argument).  Adding event support to the other areas
>> would be nice as well -- MediaList and MediaDescriptor.
>>
>> I'm willing to put in some work to implement some of this, but I was
>> informed in the IRC channel that LittleJohn may have a partial
>> implementation of this work already.
>>
>> So, LittleJohn, I'm interested to hear if you have a partial
>> implementation or not -- as I don't want to implement something if one
>> already exists -- both to save work, and to not step on your toes.
>>
>> Oh and one more thing -- an outstanding question I had:
>>
>> Does a MediaListPlayer (whatever similar name the underlying c 'object'
>> is) emit the MediaPlayer series of events (MediaPlayerPlaying, ...
>> MediaPlayerStopped, etc) as well as the MediaList series of events
>> (MediaListPlayerPlayed, MediaListPlayerNextItemSet, MediaListPlayerStopped)?
>>
>>
>>
>> Thanks!
>>
>> --
>> Keith Kyzivat
>>
>> SIPez LLC.
>> SIP VoIP, IM and Presence Consulting
>> http://www.SIPez.com
>> tel: +1 (617) 273-4000
>>
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-- 
Keith Kyzivat

SIPez LLC.
SIP VoIP, IM and Presence Consulting
http://www.SIPez.com
tel: +1 (617) 273-4000
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