In the attached little demonstration program, MediaCtrl plays a music file when the player is created in the frame init but not when it’s created by a function. I don’t understand why it works one way but not the other; I’d be grateful if someone could explain it.
Patrick
playtest.py (721 Bytes)
Patrick Maher wrote:
In the attached little demonstration program, MediaCtrl plays a music
file when the player is created in the frame __init__ but not when
it's created by a function. I don't understand why it works one way
but not the other; I'd be grateful if someone could explain it.
wx.MediaCtrl is an asynchronous control. It loads the media in a
separate thread. The file has not yet been loaded by the time you call
Play. The solution is to catch the EVT_MEDIA_LOADED event, and do the
playing there:
def play(self,event):
self.player=wx.media.MediaCtrl(self.panel, -1, fn)
self.player.Bind(wx.media.EVT_MEDIA_LOADED,self.play1)
def play1(self,event):
self.player.Play()
--
Tim Roberts, timr@probo.com
Providenza & Boekelheide, Inc.
Tim, thank you for your response. I tried the code you suggested (modified file attached) but, unfortunately, it didn’t work for me—the file still doesn’t play. I also tried a few other ways of ensuring that the media loaded before player.Play() was invoked but they didn’t work either. So I still don’t understand what’s going wrong. The fact that there is no error message makes it harder to understand.
Patrick
playtest2.py (684 Bytes)
On further investigation, I found that the reason Tim’s code doesn’t work (on my computer, anyway) is that EVT_MEDIA_LOADED is never generated and so the play1 function is never activated. But I also found that Tim’s diagnosis of the source of the problem is correct: Play is called too soon when the command comes right after Load. So I’m now looking for a way to get the needed delay before calling play and would welcome suggestions.
Patrick
You can try this:
def play(self,event):
self.player=wx.media.MediaCtrl(self.panel, -1, "Ironic.wma")
wx.CallLater(1000, self.play1)
def play1(self,event=None):
self.player.Play()
This works for me on Windows. But you have a one second delay.
I saw this in the demo:
def __init__(self, ...):
...
self.mc = wx.media.MediaCtrl(self, style=wx.SIMPLE_BORDER)
...
self.Bind(wx.media.EVT_MEDIA_LOADED, self.OnMediaLoaded)
...
#self.DoLoadFile(os.path.abspath("data/testmovie.mpg"))
wx.CallAfter(self.DoLoadFile, os.path.abspath("data/
testmovie.mpg"))
...
def DoLoadFile(self, path):
...
if not self.mc.Load(path):
wx.MessageBox("Unable to load %s: Unsupported format?" %
path,
"ERROR",
wx.ICON_ERROR | wx.OK)
else:
...
def OnMediaLoaded(self, evt):
...
That's straight from the demo, you can try to put the CallAfter part
inside the button handler. (weird, but the code as is didn't work...)
On Dec 31, 6:17 pm, Patrick Maher <patr...@maher1.net> wrote:
On further investigation, I found that the reason Tim's code doesn't work
(on my computer, anyway) is that EVT_MEDIA_LOADED is never generated and so
the play1 function is never activated. But I also found that Tim's
diagnosis of the source of the problem is correct: Play is called too soon
when the command comes right after Load. So I'm now looking for a way to
get the needed delay before calling play and would welcome suggestions.Patrick
Thanks Jad, that works. It also works for me with the time at 100 (1/10 of a second) but not at 50 (1/20 of a second). A 1/10 of a second delay isn’t too bad, though of course there’s no guarantee that this will always be sufficient.
Patrick