bugfixes
- issue parsing #EXTINF with extra space (#EXTINF: 4.000,) #1405
- Fix cue id generation in WebVTT parser #1407
- Fix error with dynamic ad-inseration causing codec / PMT/PID discontinuity - Safari #1409 #1331
- Duplicate subtitles are shown in captions menu if multiple manifest with subtitles are loaded #1413
- Fix/subtitles not displayed on IE11-Win8.1 #1416
- Fix webvtt-parser for Japanese and Korean captions #1418
improvement
- Assign alt audio tracks the codec of its group, filter unsupported alt audio tracks #1363
- Add captions OutputFilter #1411