Video VC-1 to MKV is not saved - MGEG-2 videos to MKV are

[ezilg]

Video VC-1 to MKV is not saved - MGEG-2 videos to MKV are
Log shows :
Saving 1 titles into directory /Volumes/MOBILE/Hulk
Forced subtitles track #3 turned out to be empty and was removed from output file
Forced subtitles track #5 turned out to be empty and was removed from output file
Forced subtitles track #7 turned out to be empty and was removed from output file
Forced subtitles track #9 turned out to be empty and was removed from output file
Forced subtitles track #11 turned out to be empty and was removed from output file
Forced subtitles track #13 turned out to be empty and was removed from output file
Forced subtitles track #15 turned out to be empty and was removed from output file
Forced subtitles track #17 turned out to be empty and was removed from output file
Forced subtitles track #19 turned out to be empty and was removed from output file
Forced subtitles track #21 turned out to be empty and was removed from output file
Forced subtitles track #23 turned out to be empty and was removed from output file
Forced subtitles track #25 turned out to be empty and was removed from output file
Forced subtitles track #27 turned out to be empty and was removed from output file
Forced subtitles track #29 turned out to be empty and was removed from output file
Forced subtitles track #31 turned out to be empty and was removed from output file
1 titles saved
Saving 1 titles into directory /Volumes/MOBILE/Hulk
Failed to save title 11 to file /Volumes/MOBILE/Hulk/title11.mkv
0 titles saved, 1 failed

This seems to be the complete movie
Title information
Source file name: 00020.m2ts
Duration: 2:18:13
Segment count: 1
Segment map: 20

This converts
Title information
Source file name: 00008.m2ts
Duration: 0:16:17
Segment count: 1
Segment map: 8

This doesn't
Track information
Type: Video
Codec: VC-1
Resolution: 1920x1080
Aspect ratio: 16:9
Frame rate: 23.976 (24000/1001)

The conversion process stops by itself after approx. 25%

[Smithcraft]

The disc is?

SC