Strange yeast/fermentation

[Bors]

Hey! This batch is in fermentation for 4 weeks and my OG was 1.064 and when I measured the gravity last it was 1.03 and it is not dropping down. So I repitched half a week ago and still not going below 1.03. The surface of the beer looks quite strange, I've never seen like this before. Is this normal? http://imgur.com/5BSy4EX

 

[Ozarks Mountain Brewery]

first smell it, if its infected which it looks like to me you'll know by the smell, sometimes long fermentations develop strange films on top so I cant be sure

 

[Bors]

Well, there is nothing bad with its smell or taste, so I guess it's just looking weird

 

[EbonHawk]

Link doesn't work for me. It just says "URL signature expired"...

 

[UgliestLemming]

I'm on the side of unintentional microbe infusion. It may still be fine though since you don't know what microbe it may be.

This post is good for a little more info.

 

[Bors]

I'm sorry, I changed the URL. I bottled it two days ago and now I can see the same infection on the surface in the bottle too.
Should I be prepared for some bottle explosion? :shock:
Thanks for the link btw. I could compare it to Lactobacillus infection, however it didn't have that big bubbles. Maybe because it appeared at the end of the fermentation and it didn't produce much gas.