Actually I can open them, but only the smaller ones. When I select a bigger file (7gb) in SV explorer, the SV freezes immediately and goes in the "not responding" mode. Nothing happens afterwards - SV never turns back to normal operation. Error code is Apphang81.
I don't think this happens because my machine is slow (I'm on W7-32bit with AMD Phenom(tm) II X4 820 2,8Ghz CPU and 4GB RAM), since I've opened >30gb files in Vegas before (they were in MP4 format - h.264 files converted to MP4 with YAMB) and I could edit and render them without any problems.
The .m2ts files I get from muxing h.264 files with TSmuxer.
Also I can open these big .m2ts files in Pinnacle, but I don't want to use Pinnacle, because I like Vegas much better.
Any idea how this problem can be fixed? Any advice is appreciated.