Python VLC Bindings Event Example

[JeffHoogland]

I'm using the VLC python bindings found here -> http://wiki.videolan.org/Python_bindings

I've also been reading over the excellent API documentation found here -> http://liris.cnrs.fr/advene//download/p ... types/doc/

The thing that is currently escaping me though - how do I have an event fire when a song ends? I'm assuming it has to do with EventType.MediaPlayerEndReached - but could anyone out there provide a small example on how to utilize this event? The proper syntax escapes me.

~Jeff

[JeffHoogland]

For reference a small bit of code I am trying that is failing:

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>>> mymedia = MediaList() >>> mymedia.add_media("/path/to/mediafile1") 0 >>> mymedia.add_media("/path/to/mediafile2") 0 >>> player = MediaListPlayer() >>> player.set_media_list(mymedia) >>> pevent = player.event_manager() >>> def event_cb( ev ): print "Hey look an event..." >>> pevent.event_attach(EventType().MediaPlayerMediaChanged, event_cb) -1

When I tell my player to play the media comes up just fine - but the event doesn't fire when I change tracks. I'm assuming it has to do with the returning -1 from the event_attach - what am I doing wrong?

~Jeff

[geoffs]

You're right that the -1 returned by event_attach is a problem. That's telling you that object doesn't send that event. In the version of libvlc I have, MediaListPlayer only sends EventType.MediaListPlayerNextItemSet. Try using that event.

If that doesn't do what you need, or you also want to listen for some of the MediaPlayer events, you can create a MediaPlayer, set that inside the MediaListPlayer and listen for events on the MediaPlayer as well. Something like this:

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from vlc import * mlp = MediaListPlayer() mp = MediaPlayer() mlp.set_media_player(mp) def cb(event): print "cb:", event.type, event.u mlp_em = mlp.event_manager() mlp_em.event_attach(EventType.MediaListPlayerNextItemSet, cb) mp_em = mp.event_manager() mp_em.event_attach(EventType.MediaPlayerEndReached, cb) mp_em.event_attach(EventType.MediaPlayerMediaChanged, cb) ml = MediaList() ml.add_media("/path/to/mediafile1") ml.add_media("/path/to/mediafile2") mlp.set_media_list(ml) mlp.play()

You probably don't need all 3 of those events to do what you want. This is just an example.

Once you're receiving events, look at the event.u field which is an EventUnion to get the data from the event that you want. You may have to dig around a bit in the libvlc code to figure out what data is sent by which event. I'm not sure if that's documented anywhere.

[JeffHoogland]

Thanks a lot for the example! I actually got it working yesterday (finally!) by looking at the event attach example in the vlc.py

For any who care I am using the VLC libs with an application I am working on -> http://jeffhoogland.blogspot.com/2013/0 ... lient.html

~Jeff

[panic82]

Thanks Jeff and Geoff. Jeff your example code has been very helpful and Geoff yours has solved an issue I was having related to events with the MediaListPlayer. In case anyone is curious:

Previously I only had an instance of vlc_player but after wrapping the instance of MediaPlayer with it, I was able to attach to events on MediaPlayer:

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main_player = vlc_instance.media_player_new() vlc_player = vlc_instance.media_list_player_new() vlc_player.set_media_player(main_player) vlc_events = main_player.event_manager() #print("State:" + str(vlc_player.get_state())) def vlc_action_occurred(event): print('BING BONG **************************************') return def vlc_time_changed(self, player): print print 'FPS =', player.get_fps() print 'time =', player.get_time(), '(ms)' print 'FRAME =', .001 * player.get_time() * player.get_fps() return vlc_events.event_attach(vlc.EventType.MediaPlayerMediaChanged, vlc_action_occurred) vlc_events.event_attach(vlc.EventType.MediaPlayerTimeChanged, vlc_time_changed, main_player) vlc_events.event_attach(vlc.EventType.MediaPlayerPlaying, vlc_action_occurred) vlc_events.event_attach(vlc.EventType.MediaPlayerBuffering, vlc_action_occurred) media_list = vlc_instance.media_list_new() for item in screen: media_item = vlc_instance.media_new(item['url']) media_list.add_media(media_item) item['vlc_index'] = media_list.index_of_item(media_item) print(item['vlc_index']) vlc_player.set_media_list(media_list)

Calling vlc_player stop and start now cause events to trigger!

[kartik]

Hi all, I am using the vlc instance to play a list of songs in python as follows

instance = vlc.Instance()
player = instance.media_list_player_new()
media_list = instance.media_list_new(list_of_song)
player.set_media_list(media_list)

All songs are played one by one until the end of the song list. But I am unable to identify the end of a song and start of the next. Please Help to identify this.