diff --git a/mediainfo.go b/mediainfo.go
index 86a810c..916a884 100644
--- a/mediainfo.go
+++ b/mediainfo.go
@@ -46,7 +46,9 @@ const (
 )
 
 func init() {
-    C.setlocale(C.LC_CTYPE, C.CString(""))
+    str := C.CString("")
+    defer C.free(unsafe.Pointer(str))
+    C.setlocale(C.LC_CTYPE, str)
     C.MediaInfoDLL_Load()
 }
 
@@ -69,6 +71,10 @@ func (file *File) Get(streamKind StreamKind, streamNumber int, parameter string,
     return C.GoString(C.Get(file.handle, C.MediaInfo_stream_C(streamKind), C.size_t(streamNumber), cParameter, C.MediaInfo_info_C(infoKind), C.MediaInfo_info_C(0)))
 }
 
+func (file *File) GetI(streamKind StreamKind, streamNumber int, parameter int, infoKind InfoKind) string {
+    return C.GoString(C.GetI(file.handle, C.MediaInfo_stream_C(streamKind), C.size_t(streamNumber), C.size_t(parameter), C.MediaInfo_info_C(infoKind)))
+}
+
 func (file *File) Parameter(streamKind StreamKind, streamNumber int, parameter string) string {
     return file.Get(streamKind, streamNumber, parameter, InfoText)
 }
diff --git a/mediainfo.h b/mediainfo.h
index a98e046..f2560f9 100644
--- a/mediainfo.h
+++ b/mediainfo.h
@@ -50,6 +50,11 @@ const char *Get(void *handle, MediaInfo_stream_C streamKind, size_t StreamNumber
     return toChar(MediaInfo_Get(handle, streamKind, StreamNumber, toWchar(Parameter), KindOfInfo, KindOfSearch));
 }
 
+const char *GetI(void *handle, MediaInfo_stream_C streamKind, size_t StreamNumber, unsigned long Parameter, MediaInfo_info_C KindOfInfo)
+{
+    return toChar(MediaInfo_GetI(handle, streamKind, StreamNumber, Parameter, KindOfInfo));
+}
+
 const char *Option(void *handle, char *Parameter, char *Value)
 {
     return toChar(MediaInfo_Option(handle, toWchar(Parameter), toWchar(Value)));
diff --git a/shell.nix b/shell.nix
new file mode 100644
index 0000000..baa2e35
--- /dev/null
+++ b/shell.nix
@@ -0,0 +1,8 @@
+{pkgs ? import <nixpkgs> {}}:
+pkgs.mkShell {
+  packages = with pkgs; [
+    go
+    mediainfo
+    libmediainfo
+  ];
+}