[FFmpeg-user] info options map

[Michele Salerno]

I want to do a script to automate the conversion.
If I use:
-map 0: v -map 0: m: language: ita

If it is not present the Italian language tells me:
Stream map '0: m: language: ita' matches no streams.
To ignore this, add a trailing '?' to the map.

If there are other languages (English, German, French etc) I want to
cancel to leave only the Italian language.
If the Italian language does not exist, leave the English language.

how can I do?
Thanks.

Michele Salerno