参考了N个帖子，试了很多个代码，就是合并报错，ts，m3u8，和key都在，每次都提示
[in#0 @ 0000016ae81074c0] Error opening input: No such file or directory
Error opening input file index.m3u8.
Error opening input files: No such file or directory
没招了，求大佬指教