我编写了一个使用 ffmpeg 转换媒体文件（.wav、.avi、.mp3 等）的应用程序。它仅适用于没有空格的文件名。当遇到带有空格的文件名时，应用程序会立即关闭。有人能告诉我我用来调用 ffmpeg 的字符串是否正确，还是需要转义一些字符？下面是代码片段：
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#Select Media
os.chdir("c:\\d-Converter\\ffmpeg\\bin")
wrkdir = os.getcwd()
filelist = os.listdir(wrkdir)
self.formats1 = []
for filename in filelist:
(head, filename) = os.path.split(filename)
if filename.endswith(".avi") or filename.endswith(".mp4") or filename.endswith(".flv") or filename.endswith(".mov") or filename.endswith(".mpeg4") or filename.endswith(".mpeg") or filename.endswith(".mpg2") or filename.endswith(".wav") or filename.endswith(".mp3"):
self.formats1.append(filename)
self.format_combo1=wx.ComboBox(panel, size=(140, -1),value='Select Media', choices=self.formats1, style=wx.CB_DROPDOWN, pos=(300,50))
self.Bind(wx.EVT_COMBOBOX, self.fileFormats, self.format_combo1)
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def fileFormats(self, e):
myFormats = {'audio': ('Select Format','.mp3', '.ogg', '.wav', '.wma'), 'video': ('Select Format','.flv','.mpg', '.mp4', '.mpeg')}
bad_file = ['Media not supported']
myFile = self.format_combo1.GetValue()
f_exten = (x for x in myFormats['audio'] + myFormats['video'] if myFile.endswith(x))
extension = f_exten.next()
if extension in myFormats['audio']:
self.format_combo2.SetItems(myFormats['audio'])
elif extension in myFormats['video']:
self.format_combo2.SetItems(myFormats['video'])
else:
self.format_combo2.SetItems(bad_file)
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def convertButton(self, e):
unit1 = self.format_combo1.GetValue()
if unit1:
unit1 = self.repl_Wspace(unit1)
#Media Formats
unit2 = self.format_combo2.GetValue()
unit3 = self.format_combo3.GetValue()
unit4 = None
unit5 = self.format_combo5.GetValue()
bitRate = self.format_combo6.GetValue()
unit6 = bitRate
if unit3 == '-qmax':
unit4 = self.format_combo4.GetValue()
else:
pass
os.chdir("c:\\d-Converter\\ffmpeg\\bin")
wrkdir = os.getcwd()
newfile = unit1
stripped = newfile.strip('mpeg3aviovfl4w2c.') #Strips the extension from the original file name
progname='c:\\d-Converter\\ffmpeg\\bin\\ffmpeg.exe' + ' -i '
preset1_a='-vn -ar 44100 -ac 2 -ab'
preset1_b='-f mp3 '
preset_mp3='.mp3'
chck_unit1 = self.my_endswith(unit1)
while True:
if unit5 == 'video to mp3':
if unit6 == 'k/bs' or unit6 == '':
amsg = wx.MessageDialog(None, 'You must select a bit rate.', 'Media Converter', wx.ICON_INFORMATION)
amsg.ShowModal()
amsg.Destroy()
break
elif unit5 == 'video to mp3' and unit6 != 'k/bs' or unit6 != '':
self.button.Disable()
self.button2.Enable()
self.format_combo1.Disable()
self.format_combo2.Disable()
self.format_combo3.Disable()
self.format_combo4.Disable()
self.format_combo5.Disable()
self.format_combo6.Disable()
startWorker(self.LongTaskDone, self.LongTask3, wargs=(progname, wrkdir, unit1, preset1_a, unit6, preset1_b, stripped, preset_mp3))
break
elif unit1 != unit1.endswith(".mpg") or unit1.endswith(".mpeg") or unit1.endswith(".avi") or unit1.endswith(".mp4") or unit1.endswith(".flv"):
bmsg = wx.MessageDialog(None, 'You must select a valid format to convert to .mp3.', 'Media Converter', wx.ICON_INFORMATION)
bmsg.ShowModal()
bmsg.Destroy()
break
else:
pass
if unit1 == 'Select Media' or unit1 == '':
amsg = wx.MessageDialog(None, 'You must select a media file!', 'Media Converter', wx.ICON_INFORMATION)
amsg.ShowModal()
amsg.Destroy()
break
elif unit2 == 'Select Format' or unit2 == '' or unit2 == chck_unit1:
amsg = wx.MessageDialog(None, 'You must select a valid format', 'Media Converter', wx.ICON_INFORMATION)
amsg.ShowModal()
amsg.Destroy()
break
elif unit3 == 'Select Quality' or unit3 == '':
amsg = wx.MessageDialog(None, 'You must select quality', 'Media Converter', wx.ICON_INFORMATION)
amsg.ShowModal()
amsg.Destroy()
break
elif unit3 != 'Select Quality' or unit3 != '':
self.format_combo5.Disable()
if unit3 == '-qmax':
if unit4 == '0' or unit4 == '':
amsg = wx.MessageDialog(None, 'You must select number between 1-8.', 'Media Converter', wx.ICON_INFORMATION)
amsg.ShowModal()
amsg.Destroy()
break
else:
self.button.Disable()
self.button2.Enable()
self.format_combo1.Disable()
self.format_combo2.Disable()
self.format_combo3.Disable()
self.format_combo4.Disable()
self.format_combo5.Disable()
startWorker(self.LongTaskDone, self.LongTask2, wargs=(progname,wrkdir,unit1,unit3,unit4,stripped,unit2))
break
elif unit3 == '-sameq':
self.button.Disable()
self.button2.Enable()
self.format_combo1.Disable()
self.format_combo2.Disable()
self.format_combo3.Disable()
self.format_combo4.Disable()
self.format_combo5.Disable()
startWorker(self.LongTaskDone, self.LongTask, wargs=(progname,wrkdir,unit1,unit3,stripped,unit2))
break
def LongTask(self, progname, wrkdir, unit1, unit3, stripped, unit2):
convert_file1 = progname + wrkdir + '\\' + unit1 + ' ' + unit3 + ' ' + stripped + unit2
self.statusbar.SetStatusText("Converting: " + unit1 + "...")
os.system(convert_file1)
print convert_file1
def LongTask2(self, progname, wrkdir, unit1, unit3, unit4, stripped, unit2):
convert_file2 = progname + wrkdir + '\\' + unit1 + ' ' + unit3 + ' ' + unit4 + ' ' + stripped + unit2
self.statusbar.SetStatusText("Converting: " + unit1 + "...")
os.system(convert_file2)
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