mediainfo: add page (#1646)

pages/common/mediainfo.md

@@ -0,0 +1,15 @@
+# mediainfo
+
+> Display metadata from video and audio files.
+
+- Display metadata for a given file in the console:
+
+`mediainfo {{file}}`
+
+- Store the output to a given file along with displaying in the console:
+
+`mediainfo --Logfile={{out.txt}} {{file}}`
+
+- Display the list of metadata attributes that can be extracted:
+
+`mediainfo --Info-Parameters`