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-rw-r--r--youtube_dl/postprocessor/ffmpeg.py5
1 files changed, 4 insertions, 1 deletions
diff --git a/youtube_dl/postprocessor/ffmpeg.py b/youtube_dl/postprocessor/ffmpeg.py
index 5f7298345..9f76c9d4e 100644
--- a/youtube_dl/postprocessor/ffmpeg.py
+++ b/youtube_dl/postprocessor/ffmpeg.py
@@ -231,7 +231,10 @@ class FFmpegPostProcessor(PostProcessor):
         stdout, stderr = p.communicate()
         if p.returncode != 0:
             stderr = stderr.decode('utf-8', 'replace')
-            msg = stderr.strip().split('\n')[-1]
+            msgs = stderr.strip().split('\n')
+            msg = msgs[-1]
+            if self._downloader.params.get('verbose', False):
+                self._downloader.to_screen('[debug] ' + '\n'.join(msgs[:-1]))
             raise FFmpegPostProcessorError(msg)
         self.try_utime(out_path, oldest_mtime, oldest_mtime)