> change the byte stream under your feet on seeking.
> yet. I don't want to add unused things.
> them in mpeg.c and mpegts.c by just calling ff_read_frame_flush().
> on formats which don't support this?
> Or maybe a flag?
> TODO: add entry to APIchanges, bump minor version.
> + * avio_flush(s->pb) before calling this function.