Qt+FFmpeg+SDL2播放进度显示及定位播放
参考链接：
https://avmedia.0voice.com/?id=59815
https://www.cnblogs.com/xdao/archive/2013/06/13/ffmpeg_tutor07.html
https://blog.csdn.net/qq_38204686/article/details/139888438
https://blog.csdn.net/qq_38694388/article/details/120684650
https://blog.csdn.net/qq_38694388/article/details/120732736
https://linuxcpp.0voice.com/?id=208553
https://blog.csdn.net/weixin_38890593/article/details/98958827
https://avmedia.0voice.com/?id=59800
https://blog.csdn.net/weixin_38890593/article/details/98875369
https://www.cnblogs.com/breakpointlab/p/15807316.html