So, I'm using GTK+/VLC to create a window with a video playback area and a "next" button.
It starts by playing the first video file and clicking next button will skip to the next media file, playing it. Everything working great so far.
My problem is, if I wait for MediaPlayerEndReached to be fired, button_Next() is executed but the video does not change.
Am I missing anything?
import sys
import gi
gi.require_version('Gtk', '3.0')
from gi.repository import Gtk
gi.require_version('GdkX11', '3.0')
from gi.repository import GdkX11
import vlc
import time
from os import listdir
from os.path import join
startingPath = './files/'
# ----------------------------------
class MediaWindow(Gtk.Window):
def __init__(self):
Gtk.Window.__init__(self, title="Media Player")
self.set_decorated(False) # removes titlebar
self.move(300,150)
self.connect("destroy", Gtk.main_quit)
self.currFldrIdx = 0
self.currFileIdx = 0
self.Fldrs = []
for fldrs in sorted(listdir(startingPath)):
self.Fldrs.append(join(startingPath,fldrs))
print self.Fldrs
self.num_Fldrs = len(self.Fldrs)
# vlc
self.vlcInstance = vlc.Instance('--no-xlib')
self.vlcPlayer = self.vlcInstance.media_player_new()
def setup_objects_and_events(self):
self.pause_nextImg = Gtk.Image.new_from_icon_name(
"gtk-media-forward",
Gtk.IconSize.MENU
)
# Buttons
self.button_Next = Gtk.Button()
self.button_Next.set_image(self.pause_nextImg)
self.button_Next.connect("clicked", self.on_button_NextImg)
# Area
self.draw_area = Gtk.DrawingArea()
self.draw_area.set_size_request(800,480)
self.draw_area.connect("realize",self._realized)
# Grid ------------------------------------
self.hbox1 = Gtk.Box()
self.hbox1.pack_start(self.draw_area, True, True, 0)
self.hbox2 = Gtk.Box()
self.hbox2.pack_start(self.button_Next, True, True, 0)
self.vbox = Gtk.Box(orientation=Gtk.Orientation.VERTICAL)
self.add(self.vbox)
self.vbox.pack_start(self.hbox1, True, True, 0)
self.vbox.pack_start(self.hbox2, False, True, 0)
def on_button_NextImg(self, widget):
print 'next!'
num_FldrFiles = len(listdir(self.Fldrs[self.currFldrIdx]))
self.currFileIdx = self.currFileIdx+1 if self.currFileIdx+1<num_FldrFiles else 0
fileToShow = join(self.Fldrs[self.currFldrIdx], sorted(listdir(self.Fldrs[self.currFldrIdx]))[self.currFileIdx])
print 'now showing' + fileToShow
self.vlcPlayer.set_xwindow(self.win_id)
self.vlcPlayer.set_mrl(fileToShow)
self.vlcPlayer.play()
def _realized(self, widget, data=None):
fileToShow = join(self.Fldrs[self.currFldrIdx], sorted(listdir(self.Fldrs[self.currFldrIdx]))[self.currFileIdx])
self.win_id = widget.get_window().get_xid()
self.vlcPlayer.set_xwindow(self.win_id)
self.vlcPlayer.set_mrl(fileToShow)
self.events = self.vlcPlayer.event_manager()
self.events.event_attach(vlc.EventType.MediaPlayerEndReached, self.EventManager)
self.vlcPlayer.play()
def EventManager(self, event):
if event.type == vlc.EventType.MediaPlayerEndReached:
print "Event reports - finished, playing next"
self.button_Next.clicked()
# ----------------------------------
if __name__ == '__main__':
# Create
win = MediaWindow()
# Setup
win.setup_objects_and_events()
win.show_all()
Gtk.main()
Your problem is described here:
the libvlc API is not reentrant within its callbacks https://forum.videolan.org/viewtopic.php?f=32&t=80305
and here: https://forum.videolan.org/viewtopic.php?t=82502
You should typically have a mainloop in your application (gobject.mainloop(), or Qt mainloop), so you should instead register a method to restart the player from there
This is bit mucked about with for the file names but your code now registers the GObject.idle_add() function that is required.
import sys
import gi
gi.require_version('Gtk', '3.0')
from gi.repository import Gtk, GObject
gi.require_version('GdkX11', '3.0')
from gi.repository import GdkX11
import vlc
import time
from os import listdir
from os.path import join
startingPath = './files/'
# ----------------------------------
class MediaWindow(Gtk.Window):
def __init__(self):
Gtk.Window.__init__(self, title="Media Player")
self.autoPlay = 0
self.set_decorated(False) # removes titlebar
self.move(300,150)
self.connect("destroy", Gtk.main_quit)
self.currFldrIdx = 0
self.currFileIdx = 0
self.Fldrs = ['/home/public/2005.mp3','/home/public/happy.mp3','/home/public/vp.mp3']
#for fldrs in sorted(listdir(startingPath)):
# self.Fldrs.append(join(startingPath,fldrs))
self.num_Fldrs = len(self.Fldrs) - 1
# vlc
self.vlcInstance = vlc.Instance('--no-xlib')
self.vlcPlayer = self.vlcInstance.media_player_new()
def setup_objects_and_events(self):
self.pause_nextImg = Gtk.Image.new_from_icon_name(
"gtk-media-forward",
Gtk.IconSize.MENU
)
# Buttons
self.button_Next = Gtk.Button()
self.button_Next.set_image(self.pause_nextImg)
self.button_Next.connect("clicked", self.on_button_NextImg)
# Area
self.draw_area = Gtk.DrawingArea()
self.draw_area.set_size_request(800,480)
self.draw_area.connect("realize",self._realized)
# Grid ------------------------------------
self.hbox1 = Gtk.Box()
self.hbox1.pack_start(self.draw_area, True, True, 0)
self.hbox2 = Gtk.Box()
self.hbox2.pack_start(self.button_Next, True, True, 0)
self.vbox = Gtk.Box(orientation=Gtk.Orientation.VERTICAL)
self.add(self.vbox)
self.vbox.pack_start(self.hbox1, True, True, 0)
self.vbox.pack_start(self.hbox2, False, True, 0)
def on_button_NextImg(self, widget=None):
self.currFileIdx += 1
if self.currFileIdx > self.num_Fldrs:
self.currFileIdx = 0
fileToShow = self.Fldrs[self.currFileIdx]
media = self.vlcInstance.media_new_path(fileToShow)
self.vlcPlayer.set_media(media)
if self.vlcPlayer.play() == -1:
print ("error playing",fileToShow)
else:
print("now playing",fileToShow)
def _realized(self, widget, data=None):
fileToShow = self.Fldrs[self.currFldrIdx]
self.win_id = widget.get_window().get_xid()
self.vlcPlayer.set_xwindow(self.win_id)
self.vlcPlayer.set_mrl(fileToShow)
self.events = self.vlcPlayer.event_manager()
self.events.event_attach(vlc.EventType.MediaPlayerEndReached, self.EventManager)
self.vlcPlayer.play()
def EventManager(self, event):
if event.type == vlc.EventType.MediaPlayerEndReached:
GObject.idle_add(self.on_button_NextImg)
# ----------------------------------
if __name__ == '__main__':
# Create
win = MediaWindow()
# Setup
win.setup_objects_and_events()
win.show_all()
Gtk.main()