>>1325342>mp4 converter>a good desktop app for me to use, please?ffmpeg
First extract the subtitles:
>ffmpeg -i animu.mkv subs.assWhere animu.mkv is your anime.
The subs may be in SSA or SRT format instead.
Use MKVToolNix to see what's inside the MKV.
Then encode the video:
>ffmpeg -i animu.mkv -vf ass=subs.ass -c:v h264 -crf 16 -c:a aac animu.mp4If the subs are SRT, use -vf subtitles=subs.srt instead.
If the audio is already encoded in aac, use -c:a copy instead, to avoid re-encoding it.
The resulting video may be rather large.
If it's too big for you, increase the crf value.
ffmpeg is a command-line tool.
If you want a GUI tool, you can use StaxRip or Handbrake.
I don't use those, so I don't know how well they work for burning subtitles.