Essential for non-Italian speakers. The "subtitle" mention in your query suggests a release that includes SRT or VobSub files, typically in English, French, or Spanish.
If you are cataloging this specific release, here are the typical technical details for a 720p BluRay encode of this film: 1280 x 720 (720p) Video Codec: x264 or H.264 subtitle Juliet.of.the.Spirits.1965.720p.BluRay...
It is often considered a "sister film" to 8½ , shifting the focus from a male creator’s ego to a woman’s spiritual and sexual liberation. Essential for non-Italian speakers
Won the Golden Globe for Best Foreign Language Film and received two Academy Award nominations for Best Costume Design and Best Art Direction. Won the Golden Globe for Best Foreign Language
While it's likely you're looking for information on as it relates to that specific BluRay release, I've put together a write-up that covers both the technical specs and the artistic context of the movie. Juliet of the Spirits (1965) – 720p BluRay Overview