diff --git a/ox/file.py b/ox/file.py
index d007f35..cb8cc35 100644
--- a/ox/file.py
+++ b/ox/file.py
@@ -260,6 +260,7 @@ def ffprobe(filename):
                         }.get(key, key)] = fix_value(key, s[key])
                 if 'avg_frame_rate' in s and stream.get('framerate') == "90000:1":
                     stream['framerate'] = fix_value('r_frame_rate', s['avg_frame_rate'])
+                    stream['force_framerate'] = True
                 info[s['codec_type']].append(stream)
             elif s.get('codec_type') == 'subtitle':
                 info['subtitles'] = info.get('subtitles', [])