The 2023 Blu-ray is compared to this DVD HERE

This is a serviceable DVD transfer, no more. The image is soft and grainy, and can get very murky with loss of detail in the night scenes. A constant vertical banding effect is a distraction in the dark portions of the image (see the final capture below). A further problem is the pronounced edge enhancement haloing that occasionally shows up along high contrast borders. Look, for example, at Romy Schneider's back and Trintignant's sleeve in the second screen capture. Speckles, dirt and scratches on the print are also apparent.

The aspect ratio is 4:3, slightly letterboxed to about 1.4:1. I suspect the image has been cropped left and right, as indicated by the tight framing of the opening credits and certain shots.

Audio is as good as one can expect from a film of this vintage, crisp and with only a slight background hiss. It is easy to tell that most of the dialogue has been post-synchronized. The optional English subtitles are clear and well-translated.

The extras on the disc are a gallery of production stills, some cast bios and a "trailer reel". The latter has nothing to do with this film, being a compilation of brief clips from other C'Est La Vie titles. The box insert (described on the case as a "colour booklet") is a foldout sheet with a bio of Jean-Louis Trintignant and a chapter menu.

Not a great effort by C'Est La Vie. However, since I like this film so much, and since there is no other DVD, and probably won't be any time soon, I find myself recommending this release in spite of its flaws.