#include <StringConstants.au3> ; to declare the Constants of StringRegExp
#include <Array.au3> ; UDF needed for _ArrayDisplay and _ArrayConcatenate
Local $sRegex = "(?<=, )[0-9]+(\.[0-9]+)?(?= fps)"
Local $sString = "8:9 DAR4:3], 23.98 fps" & @CRLF & _
"8:9 DAR4:3], 29.97 fps" & @CRLF & _
"8:9 DAR4:3], 25 fps" & @CRLF & _
"unrelated, 10 string" & @CRLF & _
"another, 28 fps string"
Local $aArray = StringRegExp($sString, $sRegex, $STR_REGEXPARRAYGLOBALFULLMATCH)
Local $aFullArray[0]
For $i = 0 To UBound($aArray) -1
_ArrayConcatenate($aFullArray, $aArray[$i])
Next
$aArray = $aFullArray
; Present the entire match result
_ArrayDisplay($aArray, "Result")
Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for AutoIt, please visit: https://www.autoitscript.com/autoit3/docs/functions/StringRegExp.htm