Delete subtiltes from an MKV with FFMPEG

Question

Can anonye tell me a way to delete all subtiles except from a number of specified languages from a MKV with FFMPEG, preferrably in way that this could be done sequentially from mutltiple files ?

Answer 1

Use the -map option. Example:

ffmpeg -i input.mkv -map 0 -map -0:s -map 0:s:m:language:fra -c copy output.mkv

• -map 0 Select all streams from input 0 (which is input.mkv in this example).
• -map -0:s Negative mapping that omits all subtitle streams from input 0.
• -map 0:s:m:language:fra means input 0:subtitles:metadata:language:french which selects all subtitles streams with French language metadata.
• -c copy Enables stream copy mode to only re-mux and not re-encoding.

As for sequential usage the answer depends on your OS. See How do you convert an entire directory with ffmpeg? for many examples.