I want to work out some of the limitations of Encore compared to more advanced Blu-ray authoring packages. I've chosen to examine a Blu-ray from the original series of Star Trek. This is what's on the disk: Four 50-minute episodes, plus some extras. Each episode is offered in two versions: original and enhanced. The enhanced version replaces the original exterior scenes (planets, spaceships) with modern computer-generated scenes. Any scenes featuring characters (Kirk, Spock and so on) are left unchanged in both versions. The Stream folder on the Blu-ray disk has 115 encrypted m2ts files in it, files which cannot be opened. Ripping software reveals that each episode has six m2ts files associated with it: the introduction, 4 sections that fade to black for commercials, and the credits. Those six m2ts files are from the enhanced version. The ripping software cannot see the original exterior shots, of which there would be about 80 on the disk (~20 per episode) To emphasise the last point: each enhanced version is encoded in six m2ts files that total about 50 minutes. Those six files contain enhanced exterior scenes, and original character scenes, encoded together. In combination, they form the enhanced version. Below, I have made two observations about how this disk might have been authored. If any of my observations are likely incorrect, please let me know. Observation 1 Given that the ripping software sees only the enhanced version, I assume the six files of the entire enhanced version went onto one timeline, with chapters markers at appropriate points. This timeline is accessed by a button called Enhanced in the main menu. Press Enhanced, and away you go, straight through the episode with fades to black for commercials. Observation 2 To play the episode in its original form, you click on the Original button. This is where it gets complicated and I'm not sure how they did it. What happens is this: about 20 times per episode, the enhanced version branches away to an exterior scene of the original version. You see a grainy, wooden model of the Enterprise, for example. When that original scene finishes, play branches back to the enhanced version (but it's actually going back to an original character scene, which was encoded into an m2ts file as part of the enhanced version). I said it was complicated! Those branch points are not accessible via the remote control. They are not chapter points. I'm guessing that they accomplished the above by having a second timeline identical to the first, but this second timeline has Branch points (I just made them up) as well as chapter points. At an Branch Out point, the flow branches to the original exterior shot (a grainy, model Enterprise, for example, instead of a computer-generated Enterprise). When that original clip is finished, it branches back to the enhanced version at a Branch In point. Summary So we have enhanced episodes that are broken into six m2ts files, files which contain all the enhanced sections, all the original character sections, but none of the original exterior shots. And we have original episodes that appear to use the same six m2ts files as above, but which branch away to the original exterior shots about 20 times per episode. Ques It seems to me that the type of flow described above would not be possible in Encore. Or is it possible?
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