Add back words-in-cue support (#342)

Closes https://github.com/rany2/edge-tts/issues/335
Closes https://github.com/rany2/edge-tts/issues/336

Signed-off-by: rany <rany2@riseup.net>

src/edge_tts/util.py

@@ -75,6 +75,9 @@ async def _run_tts(args: UtilArgs) -> None:
             elif chunk["type"] == "WordBoundary":
                 submaker.feed(chunk)
 
+        if args.words_in_cue > 0:
+            submaker.merge_cues(args.words_in_cue)
+
         if sub_file is not None:
             sub_file.write(submaker.get_srt())
     finally:
@@ -107,6 +110,12 @@ async def amain() -> None:
     parser.add_argument("--rate", help="set TTS rate. Default +0%%.", default="+0%")
     parser.add_argument("--volume", help="set TTS volume. Default +0%%.", default="+0%")
     parser.add_argument("--pitch", help="set TTS pitch. Default +0Hz.", default="+0Hz")
+    parser.add_argument(
+        "--words-in-cue",
+        help="number of words in a subtitle cue. Default: 10.",
+        default=10,
+        type=int,
+    )
     parser.add_argument(
         "--write-media", help="send media output to file instead of stdout"
     )