[ffmpeg] Improve version check and call it from hls (Fixes #4377)

1 files changed, 3 insertions, 3 deletions

diff --git a/youtube_dl/postprocessor/ffmpeg.py b/youtube_dl/postprocessor/ffmpeg.py
index 9303b8378..965ded4c1 100644
--- a/youtube_dl/postprocessor/ffmpeg.py
+++ b/youtube_dl/postprocessor/ffmpeg.py
@@ -37,11 +37,11 @@ class FFmpegPostProcessor(PostProcessor):
         if not self._executable:
             raise FFmpegPostProcessorError('ffmpeg or avconv not found. Please install one.')
 
-        REQUIRED_VERSION = '1.0'
+        required_version = '10-0' if self._uses_avconv() else '1.0'
         if is_outdated_version(
-                self._versions[self._executable], REQUIRED_VERSION):
+                self._versions[self._executable], required_version):
             warning = 'Your copy of %s is outdated, update %s to version %s or newer if you encounter any errors.' % (
-                self._executable, self._executable, REQUIRED_VERSION)
+                self._executable, self._executable, required_version)
             if self._downloader:
                 self._downloader.report_warning(warning)