EBML_ID_EBMLMAXIDLENGTH  255 libavformat/matroskadec.c     { EBML_ID_EBMLMAXIDLENGTH,        EBML_UINT, 0, offsetof(Ebml,id_length), {.u=4} },
EBML_ID_EBMLMAXIDLENGTH  636 libavformat/matroskaenc.c     put_ebml_uint   (pb, EBML_ID_EBMLMAXIDLENGTH    ,           4);