BOOST_REQUIRE_EQUAL (black._periods.size(), 1);
BOOST_CHECK (black._periods.front().from == DCPTime::from_frames(3, vfr));
BOOST_CHECK (black._periods.front().to == DCPTime::from_frames(7, vfr));
BOOST_REQUIRE_EQUAL (black._periods.size(), 1);
BOOST_CHECK (black._periods.front().from == DCPTime::from_frames(3, vfr));
BOOST_CHECK (black._periods.front().to == DCPTime::from_frames(7, vfr));