Disable all subtitles (softsub) in .mkv, .mp4 files

Question

I have several Movies/Animes with many subtitles, and I want disable all (not remove) subtitles in a batch (.bat file); below current code:

for %%a in (*.mkv, *.mp4) do (
    REM disable subtitles
)

How could this be done?

Take a look here How to disable subtitles decoding in ffmpeg — Hackoo, Commented Nov 18, 2022 at 13:19
@Hackoo Your link gives a solution to remove the subtitles, but the OP explicitly said that it does not want to remove them, just disabling them (no subtitle with the "default" flag) — PierU, Commented Nov 18, 2022 at 13:34
@PierU did not find any that help, ffmpeg only remove subtitles — Ricardo, Commented Nov 18, 2022 at 14:23
It has to do with the -disposition and -infer_no_subs options. But in my experience it's quite tricky to use... When I'm at home I can retrieve the exact way to use them. — PierU, Commented Nov 18, 2022 at 15:09

PierU · Accepted Answer · 2022-11-18 20:37:57Z

In a recent past I found by trial and errors how to set/unset the default subtitle tracks on the output file.

Same default track as in the input file:

-default_mode infer_no_subs

No default track:

-default_mode infer_no_subs -disposition:s -default

or

-default_mode infer_no_subs -disposition:s none

Force a default track:

-default_mode infer_no_subs -disposition:s:2 default (sets the 3rd track as default)

Note: if no option at all is coded, the 1st track is always the default track

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