film->examine_and_add_content (s);
BOOST_REQUIRE (!wait_for_jobs ());
s->only_text()->set_colour (dcp::Colour (255, 255, 0));
film->examine_and_add_content (s);
BOOST_REQUIRE (!wait_for_jobs ());
s->only_text()->set_colour (dcp::Colour (255, 255, 0));