subtitles no transcoding

[sandyshells]

i tried to post an image but i couldnt, kept getting error of format not supported. I will type it.

Video
Title 1080p H264 SDR
Codec H264
AVC Yes
Profile Main
Level 40
Resolution 1920x1080
Aspect ratio 2.40:1
Anamorphic: no
Interlaced : no
Framerate 23.976025
Bitrate 7768 kbps
Bit depth 8 bit
Video range SDR
color space bt709
color transfer bt709
color primaries bt709
pixel format yuv420p
Ref frames 1
NAL 4


Audio
Title Surround-English-AAC-5.1-Default
Language Eng
Codec AAC
AVC No
Profile LC
Layout 5.1
Channels 6ch
Bitrate 320kbps
Sample rate 44100 Hz
Default Yes
forced No
External No


Subtitle
Title Dut -ASS
Language dut
Codec ASS
AVC No
Default No
Forced No
External No