Decoder mov_text [3GPP Timed Text subtitle]:
    General capabilities: none
MOV text decoder AVOptions:
  -width             <int>        .D...S.... Frame width, usually video width (from 0 to INT_MAX) (default 0)
  -height            <int>        .D...S.... Frame height, usually video height (from 0 to INT_MAX) (default 0)


