[postprocessor/ffmpeg] Fix crash when ffprobe/avprobe are not installed (closes #5349)
'self.probe_basename' was None, so 'probe_executable' raised a KeyError exception
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					 1 changed files with 5 additions and 1 deletions
				
			
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			@ -116,6 +116,10 @@ class FFmpegPostProcessor(PostProcessor):
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    def executable(self):
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        return self._paths[self.basename]
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    @property
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    def probe_available(self):
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        return self.probe_basename is not None
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    @property
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    def probe_executable(self):
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        return self._paths[self.probe_basename]
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			@ -168,7 +172,7 @@ class FFmpegExtractAudioPP(FFmpegPostProcessor):
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    def get_audio_codec(self, path):
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        if not self.probe_executable:
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        if not self.probe_available:
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            raise PostProcessingError('ffprobe or avprobe not found. Please install one.')
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        try:
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            cmd = [
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