videoservice.py 文件源码

def findBackends() -> Munch:
        tools = Munch(ffmpeg=None, ffprobe=None, mediainfo=None)
        for backend in tools.keys():
            for exe in VideoService.config.binaries[os.name][backend]:
                binpath = QDir.toNativeSeparators('{0}/bin/{1}'.format(VideoService.getAppPath(), exe))
                if binpath is not None and os.path.isfile(binpath):
                    tools[backend] = binpath
                    break
                else:
                    binpath = find_executable(exe)
                    if binpath is not None and os.path.isfile(binpath):
                        tools[backend] = binpath
                        break
        if tools.ffmpeg is None:
            raise FFmpegNotFoundException('Could not locate any ffmpeg or libav executable on your operating system')
        return tools