Remove unused imports

[youtube-dl] / youtube_dl / postprocessor / ffmpeg.py

diff --git a/youtube_dl/postprocessor/ffmpeg.py b/youtube_dl/postprocessor/ffmpeg.py
index 4b93556af7604faf44dd95e28417ce4f89a8799f..083c79592b54f069cc25512017260f10882fb76b 100644 (file)
--- a/youtube_dl/postprocessor/ffmpeg.py
+++ b/youtube_dl/postprocessor/ffmpeg.py
@@ -8,7 +8,6 @@ import time
 from .common import AudioConversionError, PostProcessor
 
 from ..utils import (
-    check_executable,
     compat_subprocess_get_DEVNULL,
     encodeArgument,
     encodeFilename,
@@ -75,6 +74,17 @@ class FFmpegPostProcessor(PostProcessor):
                 return p
         return None
 
+    @property
+    def _probe_executable(self):
+        if self._downloader.params.get('prefer_ffmpeg', False):
+            prefs = ('ffprobe', 'avprobe')
+        else:
+            prefs = ('avprobe', 'ffprobe')
+        for p in prefs:
+            if self._versions[p]:
+                return p
+        return None
+
     def _uses_avconv(self):
         return self._executable == 'avconv'
 
@@ -120,11 +130,12 @@ class FFmpegExtractAudioPP(FFmpegPostProcessor):
         self._nopostoverwrites = nopostoverwrites
 
     def get_audio_codec(self, path):
-        if not self._exes['ffprobe'] and not self._exes['avprobe']:
+
+        if not self._probe_executable:
             raise PostProcessingError(u'ffprobe or avprobe not found. Please install one.')
         try:
             cmd = [
-                self._exes['avprobe'] or self._exes['ffprobe'],
+                self._probe_executable,
                 '-show_streams',
                 encodeFilename(self._ffmpeg_filename_argument(path), True)]
             handle = subprocess.Popen(cmd, stderr=compat_subprocess_get_DEVNULL(), stdout=subprocess.PIPE)