I have solved it. There are two problems in my program. 1. the texture should be released after each video frame display or glTexSubImage2D is used to update the texture.
2. must avoid share data conflict in multi-threading program. _______________________________________________ fltk-opengl mailing list fltk-opengl@easysw.com http://lists.easysw.com/mailman/listinfo/fltk-opengl