Fix audio/webm files

Author: kiskoza

lib/marcel/tables.rb

@@ -2162,7 +2162,8 @@ module Marcel
     ['audio/mp4', [[4, 'ftypM4A '], [4, 'ftypM4B '], [4, 'ftypF4A '], [4, 'ftypF4B ']]],
     ['video/quicktime', [[4, "moov\000"], [4, "mdat\000"], [4, "free\000"], [4, "skip\000"], [4, "pnot\000"], [4, 'ftyp'], [0, "\000\000\000\bwide"]]],
     ['video/mpeg', [[0, "\000\000\001\263"], [0, "\000\000\001\272"]]],
-    ['video/webm', [[0, "\032E\337\243", [[4..4096, "B\202", [[4..4096, 'webm']]]]]]],
+    ['video/webm', [[0, "\032E\337\243", [[4..4096, "B\202", [[4..4096, 'webm', [[4..4096, 'V_VP8'], [4..4096, 'V_VP9']]]]]]]]],
+    ['audio/webm', [[0, "\032E\337\243", [[4..4096, "B\202", [[4..4096, 'webm', [[4..4096, 'A_VORBIS'], [4..4096, 'A_OPUS']]]]]]]]],
     ['video/x-matroska', [[0, "\032E\337\243\223B\202\210matroska"]]],
     ['video/x-flv', [[0, 'FLV']]],
     ['audio/mpeg', [[0, "\377\362"], [0, "\377\363"], [0, "\377\364"], [0, "\377\365"], [0, "\377\366"], [0, "\377\367"], [0, "\377\372"], [0, "\377\373"], [0, "\377\374"], [0, "\377\375"], [0, "\377\377"], [0, 'ID3']]],