Hi EddieB,
Welcome to Sony's Community Site!
Thanks for your post. As far as I'm concerned, BNP file format is a "proprietary" binary format and probably used for internal purposes only. If you're using a Sony camcorder, please use the PlayMemories Home software to transfer and convert your videos. For further assistance regarding your concern, please contact the Sony offices/Sony representative offices nearest to your place of residence in Asia Pacific region http://www.sony-asia.com/countryselector.html?hpid=countryselector:AsiaPacific. Due to proximity, they are in a better position to respond to your questions or concerns.
If my post answers your question, please mark it as "Accept as Solution"
Regards,
Dave