otherwise prefer avconv.
postprocessor_args: A list of additional command-line arguments for the
postprocessor.
+
+ The following options are used by the Youtube extractor:
+ youtube_include_dash_manifest: If True (default), DASH manifests and related
+ data will be downloaded and processed by extractor.
+ You can reduce network I/O by disabling it if you don't
+ care about DASH.
"""
_NUMERIC_FIELDS = set((