fame_close - flush remaining data and cleanup.
       #include <fame.h>
       int fame_close(fame_context_t *context);
       fame_close()  flushes remaining data and marks video sequence ending to
       buffer , then releases the context is  the  context  handle  previously
       returned by fame_open
       fame_close returns the number of bytes written to buffer.
       fame_open(3) fame_encode_frame(3)