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-rw-r--r--youtube_dl/downloader/external.py5
1 files changed, 4 insertions, 1 deletions
diff --git a/youtube_dl/downloader/external.py b/youtube_dl/downloader/external.py
index 5d3e5d8d3..138f353ef 100644
--- a/youtube_dl/downloader/external.py
+++ b/youtube_dl/downloader/external.py
@@ -17,6 +17,7 @@ from ..utils import (
encodeArgument,
handle_youtubedl_headers,
check_executable,
+ is_outdated_version,
)
@@ -264,7 +265,9 @@ class FFmpegFD(ExternalFD):
if self.params.get('hls_use_mpegts', False) or tmpfilename == '-':
args += ['-f', 'mpegts']
else:
- args += ['-f', 'mp4', '-bsf:a', 'aac_adtstoasc']
+ args += ['-f', 'mp4']
+ if (ffpp.basename == 'ffmpeg' and is_outdated_version(ffpp._versions['ffmpeg'], '3.2')) and (not info_dict.get('acodec') or info_dict['acodec'].split('.')[0] in ('aac', 'mp4a')):
+ args += ['-bsf:a', 'aac_adtstoasc']
elif protocol == 'rtmp':
args += ['-f', 'flv']
else: