docs: private static @Nullable Pair<Integer, Integer> getVP8Dimension(final InputStream is)
        throws IOException {
      // We need to skip 7 bytes
      is.skip(7);
      // And then check the signature
      final short sign1 = getShort(is);
      final short sign2 = getShort(is);
      final short sign3 = getShort(is);
      if (sign1 != 0x9D || sign2 != 0x01 || sign3 != 0x2A) {
        // Signature error
        return null;
      }
      // We read the dimensions
      return new Pair<>(get2BytesAsInt(is), get2BytesAsInt(is));
    }