So I have an anet a8 which I want to use with octoprint. I’m eyeballing between the raspberry pi zero w and the pi 3. Which one would you suggest me? I want to reuse my old (and crappy) action cam from Rollei to stream the prints. Is it possible with an raspberry? Every input is appreciated!
Not sure about the action can, but if you want to stream through octo, go with the Pi 3. Been using it for around a year now and absolutely love it. Worked pretty much flawlessly the entire time. For the $20 or so more, I think it’s well worth it.
I managed to connect my Rollei with an OTA Adapter with my tablet. So wouldn’t it be possible to connect the cam with an raspberry?
I started with a pi 2 and now use a Pi B+ with ethernet both worked like a charm. I use a creative webcam and as the added bonus of octoprint you can set it up to record timelapse video as standard.
Go with the Pi3, the Pi Zero W’s WiFi causes significant CPU load when it is actually utilised (= webcam streaming, file uploads and downloads), causing print stuttering. At least in my tests.
I have doubts about that Rollei can since usually those action cams can’t output mjpg and individual jpeg snapshots and that’s what you’ll need for using it with OctoPrint. But YMMV.
If you want to use that camera, check the approved hardware page. There are some pretty inexpensive ones on the list.
Pi 3, unless you need a seem less integrated experience aka lots of wires finicking adapters etc. it’s just easier on a bigger board. 
@foosel question: if my wifi crashes will the printer stop? Can i print fron the sd card directly like I do it now?
It should
I recommend the bigger board not a zero for a number of reasons, unless you want the setup to look super seamless.
@Jonas_G
If my wifi crashes will the printer stop?
No, not unless it takes the whole system with it. OctoPrint streams the file to your printer on the server, it doesn’t need any network connection for that.
Can I print from the SD card directly like I do now?
Yes, but if you want to monitor the print progress through OctoPrint you’ll have to start it through OctoPrint (it also shows the files in your printer’s SD). And if you start an SD print outside of OctoPrint, do not connect to your printer from OctoPrint or any other host while it’s running - most controllers do reset on connect which would be fatal for your print, and there’s no way for OctoPrint to prevent this from happening.