Add 'maximum subtitle duration' config option to override phrases dur…

…ation limit

config.json

@@ -12,5 +12,6 @@
 	"video encoding settings (webm)": "-c:v libvpx-vp9 -crf 30 -b:v 0 -c:a libopus -b:a 64k",
 	"audio encoding settings (mp3)": "-ac 1 -c:a libmp3lame -b:a 64k",
 	"join lines with": "<br>",
-	"join sentences with": "<br>"
+	"join sentences with": "<br>",
+	"maximum subtitle duration": 0
 }

movies2anki.py

@@ -381,6 +381,9 @@ def convert_into_sentences(en_subs, phrases_duration_limit, join_lines_that_end_
     else:
         sentence_duration_limit = 20
 
+    if config["maximum subtitle duration"] != 0:
+        sentence_duration_limit = config["maximum subtitle duration"]
+
     subs = []
     for sub in en_subs:
         sub_start = sub[0]
@@ -449,6 +452,9 @@ def join_questions(en_subs, ru_subs, is_gap_phrases, is_split_long_phrases, phra
     else:
         sentence_duration_limit = 20
 
+    if config["maximum subtitle duration"] != 0:
+        sentence_duration_limit = config["maximum subtitle duration"]
+
     subs2 = []
     for i, sub in enumerate(en_subs):
         sub_start = sub[0]