Attempt to fix encoding problems with caption conversion (#92, #98, #97)

vtt_to_srt.py

@@ -9,7 +9,7 @@ def convert(directory, filename):
     index = 0
     vtt_filepath = os.path.join(directory, filename + ".vtt")
     srt_filepath = os.path.join(directory, filename + ".srt")
-    srt = open(srt_filepath, mode="w", errors="ignore")
+    srt = open(srt_filepath, mode='w', encoding='utf8', errors='ignore')
 
     for caption in WebVTT().read(vtt_filepath):
         index += 1
@@ -17,4 +17,4 @@ def convert(directory, filename):
         end = SubRipTime(0, 0, caption.end_in_seconds)
         srt.write(
             SubRipItem(index, start, end, html.unescape(
-                caption.text)).__str__() + "\n")
+                caption.text)).__str__() + "\n")