Ujjal Sarkar

will you please add title and subtitle in the key file! _subtitle ext like srt,ttml2,vtt,xml etc.._ Keys.json example ``` [ { "mpd_url": "https://ww-a.akamaihd.net/16e8/f4c4/4f83-932b-1f83a8163942/f976ab26-d37a-4fe2-94df-6baa908ae4d8.mpd" }, { "kid": "b770d5b44b6b594daf9858b5aae9aa5f", "hex_key": "b0cb44d2d31cf04bbc73db71e9865f6f" },...