I'm trying to add/replace subtitles in a BDMV folder structure. What am I missing?

[impoyster]

Off and on over the past several months I've been trying to learn how to do the title, and I've never really messed with blu rays before then. I finally feel like I'm getting close to figuring it out, yet here I am with a roadblock: sometimes the process works, and sometimes it doesn't. And when I say "process", it's really involved.

So, to start I get the subtitles ready; that's the main reason I'm doing this in the first place, after all. I use the combination of ass2bdnxml and SUPer to make those nice looking fansubs BD-compliant. Next up is the BD part of it. I'm using MeGUI 6666 to extract the streams that I want to keep in its most raw version. Afterwards, I take the extracted streams and a .sup subtitle I generated earlier and mux with tsMuxeR as a blu ray folder structure.

Now this is where I feel things get screwy. When I'm double checking the generated m2ts video file in the streams folder I see nothing wrong with it; the video and audio tracks play fine, the subtitles I put in are there, etc. I've been more or less following this plenty old video tutorial by TheDrgames (Gamer Skillz series) to this point (with the exception of the subtitle conversion) and this is where you are to merge your new m2ts and clpi files with the old structure by renaming the files to what they should replace and moving them. Afterwards, he busts out BDedit to tweak a couple things: namely, making sure there are the appropriate amounts of streams visible on the Playlist tab that point to the respective track IDs you can see in the clipinfo tab.

I test this out, to the aforementioned mixed results; sometimes testing the blu ray on vlc is perfect as if I just opened the video file, and on some others the stream is completely empty: no playback of video, audio, or subtitles, just blank for its full length. Sometimes vlc would just skip the video entirely and go to the next, which I can only assume is a "can't read, skipping..." failsafe not too dissimilar to what it does with standard video files normally, and would probably still not work if burned then inserted to my blu ray player.

Here come the newbie questions. First, how difficult is it to troubleshoot my blu ray editing process? I feel like I only try a couple things on bdedit after the barebones stuff I explained before getting frustrated and nuking the duplicate I work on to start all over and "definition of insanity". It also feels like this is only a matter of missing some steps because, like I mentioned before, some tests don't need me to do anything other than mimicking that video tutorial. Is it possible that the blu ray I'm working with needs a tool that goes more in-depth than bdedit to complete the task?

Though that's another thing: I know very little about using bdedit. I don't understand most of the abbreviations that isn't the pointing to streams step I brought up earlier. I don't know what fields can be edited or not unless I try, and there was an instance where one of the only differences I saw between the bdedit of the source folder and the bdedit of the target folder was in a read-only field (specifically, "EP coarse" in clipinfo that would've come from tsmuxer output and replaced). For whatever it's worth, I do also recall many points where bdedit would tell me that the number of packets is wrong and that it can fix it for me; I have no idea what that's about, but reflexively okay it to be on the safe side.

This is getting rambly as is so I'll cut this off here and I'll be sure to ask any other questions I have as they come up in discussion, but I appreciate any responses to this.

EDIT: I noticed MeGUI also has a m2ts muxer and decided to test it out. I input the same files as I do in tsmuxer and I noticed MeGUI uses tsmuxer for this operation, but plugging the output into the blu ray structure to replace the old file works with MeGUI but not tsmuxer on my own? I'm unsure as to why this is any different, but I guess if it works then it works. I still want to learn more in case I reach more bumps in the road since I'm at a point where I just guess and check.