Get BonkEnc from Download.com:

Or download the latest release here:

• Self extracting installer: BonkEnc-1.0.14.exe
• Plain Zip package: bonkenc-1.0.14-bin.zip

• Source code Zip package: bonkenc-1.0.14.zip
  
  (To compile BonkEnc from source code you need MinGW or MSVC 8.0 and smooth version 0.8.70.5.)