Add language/title in track selection

[moi15moi]

This PR is a draft because i'm waiting for FFMS/ffms2#467 to be merged.
Note that ffmpeg doesn't expose the BCP language of mkv file (see: https://code.ffmpeg.org/FFmpeg/FFmpeg/issues/21257). There might be a day a new field named language_bcp.

Before

Video track

Audio track

Now

Video track

Audio track

[arch1t3cht]

I know it's still a draft, but if the upstream PR is merged this will still need an ifdef for the ffms2 version - this is also why the CI fails on Linux.

[moi15moi]

@arch1t3cht Currently, this PR use this syntax Track ##: codec - [language] - Title

Do you believe I should add the channel count as requested in arch1t3cht#171

[moi15moi]

The ffms2 PR have been merged, so this PR is now ready.

[arch1t3cht]

Thanks!

[moi15moi]

@arch1t3cht Currently, this PR use this syntax Track ##: codec - [language] - Title

Do you believe I should add the channel count as requested in arch1t3cht#171

I guess that means no.

[arch1t3cht]

It's not like I'm against including the channel count, but this PR seemed fine to me as is and was already delayed long enough due to the 3.5 freeze so I merged it as is for now. The format can always be extended later.