gf_media_avc_change_par  268 include/gpac/internal/media_dev.h GF_Err gf_media_avc_change_par(GF_AVCConfig *avcc, s32 ar_n, s32 ar_d);
gf_media_avc_change_par   50 src/media_tools/isom_tools.c 		gf_media_avc_change_par(avcc, ar_num, ar_den);