diff --git a/youtube_dl/__init__.py b/youtube_dl/__init__.py
index 06bdfb689..7d3d6365f 100644
--- a/youtube_dl/__init__.py
+++ b/youtube_dl/__init__.py
@@ -282,6 +282,7 @@ def _real_main(argv=None):
         postprocessors.append({
             'key': 'FFmpegSubtitlesConvertor',
             'format': opts.convertsubtitles,
+            'ttml_convert_style': opts.ttmlconvertstyle,
         })
     if opts.embedsubtitles:
         postprocessors.append({
diff --git a/youtube_dl/options.py b/youtube_dl/options.py
index 61705d1f0..f896f7c48 100644
--- a/youtube_dl/options.py
+++ b/youtube_dl/options.py
@@ -870,6 +870,10 @@ def parseOpts(overrideArguments=None):
         '--convert-subs', '--convert-subtitles',
         metavar='FORMAT', dest='convertsubtitles', default=None,
         help='Convert the subtitles to other format (currently supported: srt|ass|vtt|lrc)')
+    postproc.add_option(
+        '--ttml-convert-no-style',
+        action='store_false', dest='ttmlconvertstyle', default=True,
+        help='Discard all style information when converting subtitles from ttml/dfxp')
 
     parser.add_option_group(general)
     parser.add_option_group(network)
diff --git a/youtube_dl/postprocessor/ffmpeg.py b/youtube_dl/postprocessor/ffmpeg.py
index 214825aa9..a139554be 100644
--- a/youtube_dl/postprocessor/ffmpeg.py
+++ b/youtube_dl/postprocessor/ffmpeg.py
@@ -591,9 +591,10 @@ class FFmpegFixupM3u8PP(FFmpegPostProcessor):
 
 
 class FFmpegSubtitlesConvertorPP(FFmpegPostProcessor):
-    def __init__(self, downloader=None, format=None):
+    def __init__(self, downloader=None, format=None, ttml_convert_style=True):
         super(FFmpegSubtitlesConvertorPP, self).__init__(downloader)
         self.format = format
+        self.ttml_convert_style = ttml_convert_style
 
     def run(self, info):
         subs = info.get('requested_subtitles')
@@ -626,7 +627,7 @@ class FFmpegSubtitlesConvertorPP(FFmpegPostProcessor):
                 srt_file = subtitles_filename(filename, lang, 'srt', info.get('ext'))
 
                 with open(dfxp_file, 'rb') as f:
-                    srt_data = dfxp2srt(f.read())
+                    srt_data = dfxp2srt(f.read(), self.ttml_convert_style)
 
                 with open(srt_file, 'w', encoding='utf-8') as f:
                     f.write(srt_data)
diff --git a/youtube_dl/utils.py b/youtube_dl/utils.py
index ac1e78002..377a60957 100644
--- a/youtube_dl/utils.py
+++ b/youtube_dl/utils.py
@@ -4902,7 +4902,7 @@ def srt_subtitles_timecode(seconds):
     return '%02d:%02d:%02d,%03d' % (seconds / 3600, (seconds % 3600) / 60, seconds % 60, (seconds % 1) * 1000)
 
 
-def dfxp2srt(dfxp_data):
+def dfxp2srt(dfxp_data, convert_style=True):
     '''
     @param dfxp_data A bytes-like object containing DFXP data
     @returns A unicode object containing converted SRT data
@@ -4944,7 +4944,7 @@ def dfxp2srt(dfxp_data):
         def start(self, tag, attrib):
             if tag in (_x('ttml:br'), 'br'):
                 self._out += '\n'
-            else:
+            elif convert_style:
                 unclosed_elements = []
                 style = {}
                 element_style_id = attrib.get('style')
@@ -4987,7 +4987,7 @@ def dfxp2srt(dfxp_data):
                 self._unclosed_elements.append(unclosed_elements)
 
         def end(self, tag):
-            if tag not in (_x('ttml:br'), 'br'):
+            if convert_style and tag not in (_x('ttml:br'), 'br'):
                 unclosed_elements = self._unclosed_elements.pop()
                 for element in reversed(unclosed_elements):
                     self._out += '</%s>' % element