Strobing on my film

[Robert Kowalski]

So i recently processed about 18 minutes worth of 100D Ektachrome I shot on my Canon 814 AZ. I was using the internal light meter. Here is what I noticed. The early shots I got were perfectly exposed, but there was a bit of strobing. As the battery was dying (which I failed to switch out or even pay attention to because of the separate Wein Cells I was using!), it became chronically under-exposed and there is a ton of strobing.

 

Question: Is the strobing something regarding the film speed and its route through the camera, or is it because of the exposure meter being wonky? I will post some footage later on youtube for examination.