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@@ -880,6 +880,8 @@ def video_with_voices(user_or_session, friendly_token=None, voicesUid=None):
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# will not be included in the output file.
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# The video stream is still copied over using -c:v copy,
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# and the combined audio track is created using the amix filter as before.
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+ # Note that if the input video file has multiple audio tracks,
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+ # the -an option will remove all audio tracks from the output file.
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cmd.append("-an")
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cmd.append(result_file_name)
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