qt视频显示程序，多线程、通过paintEvent画在lcd上，速度较快。-qt video display program, multi-threaded, painted by paintEvent lcd on, faster.

音乐播放器，能显示歌词，自己学习哈！我都学习了很久才明白的！-Music player, can display lyrics, their own learning Ha! I learned a long time came to understand it!