https://www.jianshu.com/p/868e8ee65a95
https://www.jianshu.com/p/b8782cc09e52
附：视频时间戳定义理解 https://stackoverflow.com/questions/4001755/trying-to-understand-cmtime-and-cmtimemake
本文共 226 字，大约阅读时间需要 1 分钟。
https://www.jianshu.com/p/868e8ee65a95
https://www.jianshu.com/p/b8782cc09e52
附：视频时间戳定义理解 https://stackoverflow.com/questions/4001755/trying-to-understand-cmtime-and-cmtimemake
转载于:https://www.cnblogs.com/drbbq/p/11051130.html