libavcodec/mpeg2_metadata_bsf.c:158: error: Uninitialized Value
  The value read from ext_d was never initialized.

libavcodec/mpeg2_metadata_bsf.c:158:9: 
156.         sh->frame_rate_code        = code;
157.         se->frame_rate_extension_n = ext_n - 1;
158.         se->frame_rate_extension_d = ext_d - 1;
             ^
159.     }
160. 
