More details about errors

[JeromeMartinez]

For instance, a error about a truncated file is:

Error: undecodable Matroska segment end offset is bigger than file size, maybe due to truncated file. 

And currently more tools are needed for having the details e.g.:

$ mediainfo --Details=1 a.mkv | grep 0002C
0002C   Size:                                 543708 (0x00000000084BDC)
$ ls -l a.mkv
-rwxrwxrwx 1 jerome jerome 543760 May  3 17:22 a.mkv