apparently the -n option is available only in ffmpeg

diff --git a/youtube_dl/PostProcessor.py b/youtube_dl/PostProcessor.py
index e0b071a9c84fe5c688d746900a302046cac6b1a6..6da24f986f855cded32a76a2fc60d3d420c8fdb2 100644 (file)
--- a/youtube_dl/PostProcessor.py
+++ b/youtube_dl/PostProcessor.py
@@ -108,7 +108,7 @@ class FFmpegExtractAudioPP(PostProcessor):
             acodec_opts = []
         else:
             acodec_opts = ['-acodec', codec]
-        if self._nopostoverwrites:
+        if self._nopostoverwrites and self._exes['ffmpeg']:
             overwrite_opts = '-n'
         else:
             overwrite_opts = '-y'