how to disabled auto level?

[mudoo]

i want use lowest level and set startfromlevel=0 seekfromlevel=0, but it auto switch highest level always. how can i disabled that??

playlist like this:

#EXTM3U
#EXT-X-STREAM-INF:PROGRAM-ID=1,BANDWIDTH=800,RESOLUTION=854x480
5bfde926-23e4-8a59-47a3-7ae535d8e5e0_md.m3u8
#EXT-X-STREAM-INF:PROGRAM-ID=1,BANDWIDTH=500,RESOLUTION=640x360
5bfde926-23e4-8a59-47a3-7ae535d8e5e0_ld.m3u8
#EXT-X-ENDLIST

sorry. poor english.