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eac3to Exploiting Seamless Branching
#1
The Aluminum Falcon raised this topic a while back on ot.com.  See his informative thread here.  While he uses tsMuxeR, eac3to is a better tool for the job because it runs a second pass when fixing the gaps that result from seamless branching.
  • The only tool you need is eac3to.
  • I'll use Aliens as an example and add other playlists as and when.
  • Adjust everything to fit your directory structure, e.g., change "X" to whatever; do a "find and replace".  
  • When joining M2TS files like this, make sure you have space on the drive in which eac3to is located as well as the drive in which the BD is located. This is because eac3to makes temporary files on the drive it occupies.
  • If your branching disc has a Dolby TrueHD track, you must decode it instead of extracting it.  DTS-HD MA tracks can be extracted without incident.
  •  So far, this approach works only on standard BDs.  UHD BDs have sync issues.
Aliens: CBS TV cut

Code:
"filepath\eac3to334\eac3to.exe" "X:\ALIENS_WW\BDMV\Stream\01106.m2ts"+"X:\ALIENS_WW\BDMV\Stream\01107.m2ts"+"X:\ALIENS_WW\BDMV\Stream\01108.m2ts"+"X:\ALIENS_WW\BDMV\Stream\01140.m2ts"+"X:\ALIENS_WW\BDMV\Stream\01110.m2ts"+"X:\ALIENS_WW\BDMV\Stream\01142.m2ts"+"X:\ALIENS_WW\BDMV\Stream\01112.m2ts"+"X:\ALIENS_WW\BDMV\Stream\01144.m2ts"+"X:\ALIENS_WW\BDMV\Stream\01114.m2ts"+"X:\ALIENS_WW\BDMV\Stream\01147.m2ts"+"X:\ALIENS_WW\BDMV\Stream\01117.m2ts"+"X:\ALIENS_WW\BDMV\Stream\01149.m2ts"+"X:\ALIENS_WW\BDMV\Stream\01119.m2ts"+"X:\ALIENS_WW\BDMV\Stream\01146.m2ts"+"X:\ALIENS_WW\BDMV\Stream\01121.m2ts"+"X:\ALIENS_WW\BDMV\Stream\01124.m2ts"+"X:\ALIENS_WW\BDMV\Stream\01125.m2ts"+"X:\ALIENS_WW\BDMV\Stream\01141.m2ts"+"X:\ALIENS_WW\BDMV\Stream\01127.m2ts"+"X:\ALIENS_WW\BDMV\Stream\01128.m2ts"+"X:\ALIENS_WW\BDMV\Stream\01129.m2ts"+"X:\ALIENS_WW\BDMV\Stream\01130.m2ts"+"X:\ALIENS_WW\BDMV\Stream\01131.m2ts"+"X:\ALIENS_WW\BDMV\Stream\01133.m2ts"+"X:\ALIENS_WW\BDMV\Stream\01134.m2ts"+"X:\ALIENS_WW\BDMV\Stream\01137.m2ts"  -demux

Alien: Extended

Code:
"filepath\eac3to334\eac3to.exe" "X:\ALIEN_WW\BDMV\STREAM\00983.m2ts"+"X:\ALIEN_WW\BDMV\STREAM\00985.m2ts"+"X:\ALIEN_WW\BDMV\STREAM\00984.m2ts"+"X:\ALIEN_WW\BDMV\STREAM\00986.m2ts"+"X:\ALIEN_WW\BDMV\STREAM\00987.m2ts"+"X:\ALIEN_WW\BDMV\STREAM\01016.m2ts"+"X:\ALIEN_WW\BDMV\STREAM\00988.m2ts"+"X:\ALIEN_WW\BDMV\STREAM\00991.m2ts"+"X:\ALIEN_WW\BDMV\STREAM\00989.m2ts"+"X:\ALIEN_WW\BDMV\STREAM\01018.m2ts"+"X:\ALIEN_WW\BDMV\STREAM\00992.m2ts"+"X:\ALIEN_WW\BDMV\STREAM\00995.m2ts"+"X:\ALIEN_WW\BDMV\STREAM\00993.m2ts"+"X:\ALIEN_WW\BDMV\STREAM\00997.m2ts"+"X:\ALIEN_WW\BDMV\STREAM\00996.m2ts"+"X:\ALIEN_WW\BDMV\STREAM\00998.m2ts"+"X:\ALIEN_WW\BDMV\STREAM\00999.m2ts"+"X:\ALIEN_WW\BDMV\STREAM\01001.m2ts"+"X:\ALIEN_WW\BDMV\STREAM\01000.m2ts"+"X:\ALIEN_WW\BDMV\STREAM\01003.m2ts"+"X:\ALIEN_WW\BDMV\STREAM\01002.m2ts"+"X:\ALIEN_WW\BDMV\STREAM\01004.m2ts"+"X:\ALIEN_WW\BDMV\STREAM\01005.m2ts"+"X:\ALIEN_WW\BDMV\STREAM\01007.m2ts"+"X:\ALIEN_WW\BDMV\STREAM\01006.m2ts"+"X:\ALIEN_WW\BDMV\STREAM\01008.m2ts"+"X:\ALIEN_WW\BDMV\STREAM\01009.m2ts"+"X:\ALIEN_WW\BDMV\STREAM\01027.m2ts"+"X:\ALIEN_WW\BDMV\STREAM\01010.m2ts"+"X:\ALIEN_WW\BDMV\STREAM\01013.m2ts"+"X:\ALIEN_WW\BDMV\STREAM\01012.m2ts" -demux

Alien 3: Extended
Code:
"filepath\eac3to334\eac3to.exe"
00750.m2ts+00752.m2ts+00753.m2ts+00701.m2ts+00755.m2ts+00703.m2ts+00757.m2ts+00758.m2ts+00759.m2ts+00760.m2ts+00761.m2ts+00762.m2ts+00763.m2ts+00764.m2ts+00765.m2ts+00766.m2ts+00767.m2ts+00768.m2ts+00769.m2ts+00770.m2ts+00771.m2ts+00772.m2ts+00773.m2ts+00774.m2ts+00775.m2ts+00776.m2ts+00777.m2ts -demux

Alien 3: Extended (chest-burster ending)
Code:
"filepath\eac3to334\eac3to.exe"
00750.m2ts+00752.m2ts+00753.m2ts+00701.m2ts+00755.m2ts+00703.m2ts+00757.m2ts+00758.m2ts+00759.m2ts+00760.m2ts+00761.m2ts+00762.m2ts+00763.m2ts+00764.m2ts+00765.m2ts+00766.m2ts+00767.m2ts+00768.m2ts+00769.m2ts+00770.m2ts+00771.m2ts+00772.m2ts+00773.m2ts+00774.m2ts+00775.m2ts+00713.m2ts+00777.m2ts -demux

Close Encounters of the Fourth Tongue Kind (1977)

This uses the 30th Anniversary Edition, not the 40th Anniversary one that followed in 2017.  I should imagine it would work with the first Sony BD too.  Use the DTS-HD MA track.

Chronology: Roy is fired -> India sequence -> Lacombe's auditorium speech -> Roy goes back to the road with his camera
*no McDonald's sign

Code:
"filepath\eac3to334\eac3to.exe" "X:\CETK\BDMV\STREAM\00000.m2ts"+"X:\CETK\BDMV\STREAM\00002.m2ts"+"X:\CETK\BDMV\STREAM\00006.m2ts"+"X:\CETK\BDMV\STREAM\00008.m2ts"+"X:\CETK\BDMV\STREAM\00009.m2ts"+"X:\CETK\BDMV\STREAM\00010.m2ts"+"X:\CETK\BDMV\STREAM\00013.m2ts"+"X:\CETK\BDMV\STREAM\00015.m2ts"+"X:\CETK\BDMV\STREAM\00016.m2ts"+"X:\CETK\BDMV\STREAM\00018.m2ts"+"X:\CETK\BDMV\STREAM\00020.m2ts"+"X:\CETK\BDMV\STREAM\00022.m2ts"+"X:\CETK\BDMV\STREAM\00024.m2ts"+"X:\CETK\BDMV\STREAM\00025.m2ts"+"X:\CETK\BDMV\STREAM\00026.m2ts"+"X:\CETK\BDMV\STREAM\00027.m2ts"+"X:\CETK\BDMV\STREAM\00118.m2ts"+"X:\CETK\BDMV\STREAM\00119.m2ts"+"X:\CETK\BDMV\STREAM\00032.m2ts"+"X:\CETK\BDMV\STREAM\00033.m2ts"+"X:\CETK\BDMV\STREAM\00034.m2ts"+"X:\CETK\BDMV\STREAM\00037.m2ts"+"X:\CETK\BDMV\STREAM\00038.m2ts"+"X:\CETK\BDMV\STREAM\00040.m2ts"+"X:\CETK\BDMV\STREAM\00041.m2ts"+"X:\CETK\BDMV\STREAM\00043.m2ts"+"X:\CETK\BDMV\STREAM\00044.m2ts"+"X:\CETK\BDMV\STREAM\00046.m2ts"+"X:\CETK\BDMV\STREAM\00048.m2ts" 1: "X:\CETK\BDMV\video.264"  3: "X:\CETK\BDMV\audio.dtshd"
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#2
*added Close Encounters of the Fourth Tongue Kind (1977)*
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#3
Hi Chewtobacca!

I'm sort of bumping another old thread of yours, but I think I can share good information here too.

While I know very little about how eac3to and other softwares work, in my research for the best tool to demux seamless branced discs (specially UHDs), I came to know of DGDemux.

It's a tool specifically designed with seamless branced disc in mind and from what I know, the only one capable of properly demuxing DTHD Atmos tracks like Toy Story 4 and Onward UHDs and many other discs with multiple gaps.

It's not a free tool, but upon contribution the developer grants lifetime update support and other tools he's developed.

ps: I gain nothing from advertising the tool, I'm just a (very satisfied) paying costumer.
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#4
Yeah, I have a license as well. DGDemux wasn't available when I posted the guide, but it can indeed accomplish the same task.
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#5
It does appear to give slightly different results, but I don't know whether it's more or less accurate than eac3to.

The 2015 T2 audio is not bit identical when demuxed with both.
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#6
That's probably a consequence of how the gaps are processed.  The two apps might well take different approaches, as tsMuxeR and eac3to always have.

There's plenty of fun to be had with that T2 BD.  It's possible to recreate ADM's Fourth Option, amongst other possibilities.  I meant to add it to the list but never got round to it.
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