film->set_j2k_bandwidth (target_bits_per_second);
shared_ptr<ImageContent> content (new ImageContent(private_data / "prophet_frame.tiff"));
film->examine_and_add_content (content);
film->set_j2k_bandwidth (target_bits_per_second);
shared_ptr<ImageContent> content (new ImageContent(private_data / "prophet_frame.tiff"));
film->examine_and_add_content (content);