What exactly is happening when BD Rebuilder converts the secondary

[Dirk Diggler]

stream and it uses 12.75 GB of RAM
http://i52.tinypic.com/5zee60.png

[jdobbs]

There are certain kinds of streams and/or situations that can't be handled directly from an M2TS (e.g. VC-1 field-based interlaced) -- so they have to be converted to MKV before encoding. I can't remember whether the issue is within FFDSHOW or HAALI...

I have no idea about the 12.75GB of RAM -- but it doesn't do so on my system (I only have 8GB).