ocaml-ffmpeg 1.1.8

1.1.8 (2023-07-01)

• Added asynchronous stream copy creation API.
• Added pkt_dts API for AVFrame.
• Raise exception when re-using a closed container.
• Move caml_remove_generational_global_root to ocaml finalizers
  to follow OCaml 5 memory model.
• Added Avutil.Frame.{duration, set_duration}
• Reset metadata before setting new value.
• Fix min/max filter option values for int and int64 type.
• Add flush API to avfilter.
• Add support for data streams.