subtitle metadata not properly set

[rayures]

converting a mkv to mp4 for chromecast compatibility with v1.9.6.1-alpha

"Axiom.FFmpeg\ffmpeg\bin\ffmpeg.exe" -y -i "video.mkv" -i "subtitle sync.en.srt" -i "NL audio_SUBTITLE_Stream_3.srt" -c:v copy -map 0:v:0? -c:a aac -b:a 400k -map 0:a? -c:s mov_text -map 1:s? -map 2:s? -disposition:s:1 default -metadata:s:s:0 title="English" -metadata:s:s:0 language="en" -metadata:s:s:1 title="Nederlands" -metadata:s:s:1 language="nl" -map_chapters 0 -map_metadata:s:v 0 -map_metadata:s:a 0 -f mp4 -threads 0 "video.mp4"

result is undefined audio and video metadata.

ie:
MPC-BE

Jellyfin:

Mediainfo does report de data:

is this a bug or a limitation of mp4 (no srt) or MOV-text?

[MattMcManis]

I'm not sure why it's not working with srt mov_text. It works with mkv ssa.

I will do some research and find out what the correct commands are.

[MattMcManis]

Until then I suggest using MKVToolNix to do subtitle metadata.