@begingroup --> @defgroup, only the latter is correct Doxygen syntax.

Originally committed as revision 23990 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavcodec/rv40data.h

@@ -65,7 +65,7 @@ static const uint8_t rv40_luma_dc_quant[2][32] = {
 };
 
 /**
- * @begingroup loopfilter coefficients used by the RV40 loop filter
+ * @defgroup loopfilter coefficients used by the RV40 loop filter
  * @{
  */
 /**