* - "can-rate"
* - "can-rewind"
* - "can-record" (if a stream can be recorded while playing)
- * - "teletext-es" to get the index of spu track that is teletext -1 if no teletext)
+ * - "teletext-es" (list of id from the spu tracks (spu-es) that are teletext, the
+ * variable value being the one currently selected, -1 if no teletext)
* - "signal-quality"
* - "signal-strength"
* - "cache" (level of data cached [0 .. 1])