libavformat/rmdec.c:842: error: Uninitialized Value
  The value read from pos was never initialized.

libavformat/rmdec.c:842:17: 
840.                                       &seq, flags, timestamp);
841.             if((flags&2) && (seq&0x7F) == 1)
842.                 av_add_index_entry(st, pos, timestamp, 0, 0, AVINDEX_KEYFRAME);
                     ^
843.             if (res)
844.                 continue;
