для этого нужно знать как работает этот самый mp3split. двухминутного чтения хелпа хватило бы для того чтобы найти параметры -o и -d
-o FORMAT
Output format. FORMAT is a string that will be used as output directory and/or filename. If FORMAT contains the DIRCHAR character ('\' on windows and '/' on other systems), directories will be created for each DIRCHAR if they don't exist and the output files will be created in the corresponding directory. If the -d option is not specified, the output directory is the concatenation of the input file directory and the extracted path from FORMAT. If the -d option is also specified, the output directory will be the concatenation between the -d option value and the extracted path from the -o FORMAT (characters up to the last DIRCHAR). Invalid filename characters from the tags are transformed to '_'.
It can contain name variables, that must begin with @ char and that can be:
@A: performer if found, otherwise artist
@a: artist name
@p: performer of each song (only with .cue)
@b: album title
@g: genre
@t: song title*
@n: track number identifier* (not the real ID3 track number)**
@N: track tag number**
@l: track number identifier as lowercase letter* (not the real ID3 track number)**
@L: track tag number as lowercase letter**
@u: track number identifier as uppercase letter* (not the real ID3 track number)**
@U: track tag number as uppercase letter**
@f: input filename (without extension)
@m, @s or @h: the number of minutes, seconds or hundreths of seconds of the start splitpoint**
@M, @S or @H: the number of minutes, seconds or hundreths of seconds of the end splitpoint**
(**) One digit may follow defining the number of digits to output.
If the digit is 0, then a special rule is applied when the pattern value is equal to 0:
- the pattern is discarded
- all characters like : _ . and -. preceding it are discarded
- all characters following it are discarded up to the next @ or a separator like : _ . and -
This rule is useful for discarding the last part of the time when equal to 0. For example @m_@s_@h0hundreths__@M_@S will only output @m_@s__@M_@S if the hundreths of seconds are 0.
When split files are more than one, at least one of @t, @n, @N, @l, @L, @u or @U (*) must be present to avoid ambiguous names. You can put any prefix, separator, suffix in the string, for more elegance. To make easy the use spaces in output filename without interfering with line parameters, you can use the char '+' that will be automatically replaced with a space. Valid examples are:
@n_@a_@b_@t
@a+-+@n+-+@t (default if using -c and -o is not specified)
@a/@b/@t_@n (will create the directories '<artist>' and '<artist>/<album>')
@f_@n+@m:@s+@M:@S
-d NAME
Output directory. To put all output files in the directory named NAME. If directory does not exists, it will be created. The -o option can also be used to output files into a directory.
как результат конечный батник (хотя какой там батник если ванлайном все делается) может выглядеть приблизительно так:
forfiles /P folder\ /m "*.mp3" /c "mp3split -c file.cue @path -d folder2\"
все это весьма приблизительно, да непонятно зачем, там же гуи есть, и морочиться ради одного файла даже не понимаю зачем.