【发布时间】：2011-08-19 11:02:03
【问题描述】：
我需要让不同尺寸的视频都以相同的尺寸显示，等等 600*400 像素。 我正在使用在某处找到的代码，但问题是当我打开例如 720p 视频文件时，视频将以原始大小显示。
那么有没有可能使用 mediactrl 调整视频大小？
如果不是，那么在 wxpython 中嵌入 videoplayback 并带有调整大小选项的最有效方法是什么？
我在 OSX Lion、MacPython 2.7.2、wxpython 2.8 上以 32 位模式运行
import wx
import wx.media
import os
class Panel1(wx.Panel):
def __init__(self, parent, id):
#self.log = log
wx.Panel.__init__(self, parent, -1, style=wx.TAB_TRAVERSAL|wx.CLIP_CHILDREN)
# Create some controls
try:
self.mc = wx.media.MediaCtrl(self, style=wx.SIMPLE_BORDER)
except NotImplementedError:
self.Destroy()
raise
loadButton = wx.Button(self, -1, "Load File")
self.Bind(wx.EVT_BUTTON, self.onLoadFile, loadButton)
playButton = wx.Button(self, -1, "Play")
self.Bind(wx.EVT_BUTTON, self.onPlay, playButton)
pauseButton = wx.Button(self, -1, "Pause")
self.Bind(wx.EVT_BUTTON, self.onPause, pauseButton)
stopButton = wx.Button(self, -1, "Stop")
self.Bind(wx.EVT_BUTTON, self.onStop, stopButton)
slider = wx.Slider(self, -1, 0, 0, 0, size=wx.Size(300, -1))
self.slider = slider
self.Bind(wx.EVT_SLIDER, self.onSeek, slider)
self.st_file = wx.StaticText(self, -1, "Open video file", size=(200,-1))
self.st_size = wx.StaticText(self, -1, size=(100,-1))
self.st_len = wx.StaticText(self, -1, size=(100,-1))
self.st_pos = wx.StaticText(self, -1, size=(100,-1))
# setup the button/label layout using a sizer
sizer = wx.GridBagSizer(5,5)
sizer.Add(loadButton, (1,1))
sizer.Add(playButton, (2,1))
sizer.Add(pauseButton, (3,1))
sizer.Add(stopButton, (4,1))
sizer.Add(self.st_file, (1, 2))
sizer.Add(self.st_size, (2, 2))
sizer.Add(self.st_len, (3, 2))
sizer.Add(self.st_pos, (4, 2))
sizer.Add(self.mc, (5,1), span=(5,1)) # for .avi .mpg video files
self.SetSizer(sizer)
self.timer = wx.Timer(self)
self.Bind(wx.EVT_TIMER, self.onTimer)
self.timer.Start(100)
def onLoadFile(self, evt):
dlg = wx.FileDialog(self, message="Choose a media file",
defaultDir=os.getcwd(), defaultFile="",
style=wx.OPEN | wx.CHANGE_DIR )
if dlg.ShowModal() == wx.ID_OK:
path = dlg.GetPath()
self.doLoadFile(path)
dlg.Destroy()
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:
folder, filename = os.path.split(path)
self.st_file.SetLabel('%s' % filename)
self.mc.SetBestFittingSize()
self.GetSizer().Layout()
self.slider.SetRange(0, self.mc.Length())
self.mc.Play()#ITS TO PROBLEM, WHY IT DOESNT PLAY HERE?#
def onPlay(self, evt):
self.mc.Play()
def onPause(self, evt):
self.mc.Pause()
def onStop(self, evt):
self.mc.Stop()
def onSeek(self, evt):
offset = self.slider.GetValue()
self.mc.Seek(offset)
def onTimer(self, evt):
offset = self.mc.Tell()
self.slider.SetValue(offset)
self.st_size.SetLabel('size: %s ms' % self.mc.Length())
self.st_len.SetLabel('( %d seconds )' % (self.mc.Length()/1000))
self.st_pos.SetLabel('position: %d ms' % offset)
app = wx.PySimpleApp()
# create a window/frame, no parent, -1 is default ID
frame = wx.Frame(None, -1, "play audio and video files", size = (600, 350))
# call the derived class
Panel1(frame, -1)
frame.Show(1)
app.MainLoop()
【问题讨论】：