It's kind of hard to see...it might be the beginning of a pellicle, but it's hard to say for sure. It won't make you sick, so try a sample and see how it tastes. Even if it is an infection, that doesn't mean it's an automatic dumper.
I was looking at the growth in the near end of the pic. See that broken ice pack stuff? Looks like the lacto infection I had recently,the first stage. It then turns to a grainy white film with slimy bubbles on it. After that,the bubbles start looking furry & get this sky blur fuzzy dot in the middle.