ffmpeg: how increase segment count in m3u8 file?

I try to convert a *.mkv file to HLS(m3u8) file with this code in ffmpeg :

ffmpeg -i foo.mkv -acodec libfdk_aac -vcodec libx264 -s 800x600 -f segment blah.m3u8

when converting finish i see that only 5 name of segment exist in m3u8 file, a sample is :

#EXTM3U
#EXT-X-VERSION:3
#EXT-X-TARGETDURATION:10
#EXT-X-MEDIA-SEQUENCE:69
#EXTINF:1.400000,
169.ts
#EXTINF:10.000000,
170.ts
#EXTINF:5.240000,
171.ts
#EXTINF:10.000000,
172.ts
#EXTINF:1.920000,
173.ts
#EXT-X-ENDLIST

and vlc could not play it ,anyone know that how i can make a m3u8 file with all converted segment? tnx