def setOutputFormat(self, format, outDir, params):
"""
Set output format.
:param format: format to set
:type format: string
:param outDir: base output directory for output files
:type outDir: string
:param params: format parameters
:type params: dict
:return: True if ok, False if format does not exists.
"""
tmp = ((c_char_p * 2) * (len(params) + 1))()
tmp[:-1] = [(c_char_p * 2)(c_char_p(k), c_char_p(v))
for k, v in params.iteritems()]
return yc.audiofileprocessor_setOutputFormat(self.ptr, format, outDir,
tmp) and True or False
