Revision 81983bc0-c46f-43c8-ba9d-c7f5d94c21e0 - Code Golf Stack Exchange

# [Vyxal](https://github.com/Vyxal/Vyxal), 16 bytes
```
b8∆Zf⁰LbLẇvBꜝ‹İ∑
```
[Try it Online!](https://vyxal.pythonanywhere.com/#WyIiLCIiLCJiOOKIhlpm4oGwTGJM4bqHdkLqnJ3igLnEsOKIkSIsIiIsIlsxNzAsIDc2LCAxOSwgMTk1LCAzMl1cblwiIGFiY2RlZmdoaWprbG1ub3BxcnN0dXZ3eHl6XCIiXQ==)

```
b # Convert each from binary
 8∆Z # Pad each to length 8
 f # Flatten
 ẇ # Split into chunks of length... 
 ⁰LbL # Length of the encoder string, in binary
 vBꜝ‹ # Convert each from binary, remove 0s and decrement
 İ∑ # Index those into the encoder and sum
```