348? 334? in vdub script. What are there?

[jarthel]

I found these lines in a vub script using divx5 encoding

---- 1st encoding ------
VirtualDub.video.SetCompression(0x78766964,0,10000,0);
VirtualDub.video.SetCompData(338,.....
----- another file for encoding ------------------
VirtualDub.video.SetCompression(0x78766964,0,10000,0);
VirtualDub.video.SetCompData(348,.....

I tried it myself using 2 pass encoding and queued the jobs. Both jobs gave me 348.

On some jobs created by gknot (also 2 pass encoding) using 1-button encoding, it gave me 334.

Can someone tell me what are these? Thanks :)

Jayel