Add internal entry or tag to SRT files with details

[Scavy]

Would it be possible to add a entry or a tag inside SRT files with details about the subtitles?
Like add info about video/moviename and edition, subtitle language, video/subtitle runtime, framerate and type.

It could be on the last line as a very last runtime entry - so it isn't shown during the viewing of the video.
It should be within standards, so nothing special.

This could be optional.. like a checkbox.

If all subtitle editor programs could agree on a relatively common way to format this, it would would be great help for handling subtitles in general.