MeGUI HD stream extractor freezes on extracting Blu-ray video track

[wonderflonium]

I'm trying to follow this guide to losslessly extract the audio and video tracks from a Blu-ray to edit in Adobe Premiere CS5.5. I have the Blu-ray ripped to an external HDD. I'm able to extract the audio tracks without any problem, but when I try to extract the video, it freezes like this:



I tried using mkvmerge to remux one of the m2ts files into an mkv containing only the video track, deleting all the audio and subtitles in case they were causing the problem, then opening the new mkv in MeGui. No dice. Does anyone know what might be causing this, or if there's another way to get lossless video files from a Blu-ray that Premiere can edit?

Here's the MediaInfo for the video:

General
ID : 0 (0x0)
Complete name : H:\[...]\BDMV\STREAM\00024.m2ts
Format : BDAV
Format/Info : Blu-ray Video
File size : 6.31 GiB
Duration : 42mn 11s
Overall bit rate mode : Variable
Overall bit rate : 21.4 Mbps
Maximum Overall bit rate : 48.0 Mbps

Video
ID : 4113 (0x1011)
Menu ID : 1 (0x1)
Format : VC-1
Format profile : Advanced@L3
Codec ID : 234
Duration : 42mn 10s
Bit rate : 17.8 Mbps
Width : 1 920 pixels
Height : 1 080 pixels
Display aspect ratio : 16:9
Frame rate : 23.976 fps
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Progressive
Compression mode : Lossy
Bits/(Pixel*Frame) : 0.357
Stream size : 5.23 GiB (83%)

Edit: Okay, I think the problem is the VC-1 format. Is it impossible to edit VC-1 without converting it to something else first?

Double Edit: Figured out a workaround: instead of using the stream extractor to export directly to mkv, export to a .vc1 file, then manually mux that file into a new mkv. Still not really sure what's going on, but if anyone else encounters this problem, give that a try.