, video_server_url.c_str()
, (video_server_url.length()>0 && video_server_url.at(video_server_url.length()-1) == '/')?"":"/"
, (long long) (video_duration * seek_slider.get_value() / 1000.0)
, clip_width, clip_height, u.c_str());
, video_server_url.c_str()
, (video_server_url.length()>0 && video_server_url.at(video_server_url.length()-1) == '/')?"":"/"
, (long long) (video_duration * seek_slider.get_value() / 1000.0)
, clip_width, clip_height, u.c_str());