Lincoln Burrows
16th February 2010, 08:44
I have posted a question on this thread regarding the multiple angles from videos, while using MakeMKV to extract them:
http://forum.doom9.org/showthread.php?t=144611&page=14
But now that I looked the Matroska FAQ, there's an entry saying we need to use MKVMerge to do this job.
15) Does Matroska support multi-angle video files (multiple video streams in one matroska file)?
yes, you can create such files with gabest's mkv muxer in graphedit or mkvmerge. playback works with Haali's mkv splitter in directshowThere are some things I would like to know, because while merging two video angles worked for me for the first time, it created another problem.
Let me explain from the beginning.
This is the Star Trek/TOS on Blu-ray. Some specific scenes from all episodes have new special effects, while all other scenes are normal and don't have it, being the same in both cases.
If you change the video angle you will find out they look exactly the same (I believed one was SD and the other High Def, but that was not the case). Those specific scenes (featuring new or old special effects) are even on a single file with 100 MB each, for example. They are not "mixed" with the rest. When you play them, you will notice they are not attached with any part of the episode - and are all alone.
When we are playing this disc, using TMT (from Arcsoft), for example, the player reads the interval between 00044.m2ts and 00098.m2ts which is about 8 GB of size, from that episode.
00000.mpls can ignore the files between that interval that are only featuring the new special effects, and vice versa.
When we change the video angle, TMT reads the 00000.mpls instruction which uses the exact files from the interval 00044.m2ts and 00098.m2ts but instead of doing this:
00044.m2ts >>> 00046.m2ts >>> 00047.m2ts until 00098.m2ts = Episode with old special effects
It will do that:
00044.m2ts >>> 00045.m2ts >>> 00046.m2ts >>> 00047.m2ts until 00098.m2ts = Episode with new special effects - note the file 00045.m2ts with 100 MB of size was called by the playerWe don't have each episode duplicated on the disc.
It's a bunch of files with all the new and old special effects (there aren't many). The player just seeks specific files when asked to change the video angle, and after that file is used, the episode continues reading the 1st angle, while it might appear it is reading the second.
Then what is the problem?
MakeMKV is capable of saving all angles if asked, but it will only save the ENTIRE VIDEO + the angles desired. It will not separate them (this is not possible, considering that one of the special effects might be linked to the full video). The others might be located on individual files, as explained above.
Do you know what I mean? And by default, MakeMKV is disabling the 2nd angle of all episodes (not sure why).
That means, I will end up having one 8 GB file with the new special effects and another 8 GB file with the old special effects.
MKVMerge is going to waste 15/16 GB and save both videos into a single file, with 2 video angles. But that is only an option when the 2nd angle is 99% different from the first. Not 5% (my case).
If we have a 50 min episode where 3 or 4 scenes that are wasting no more than 30 seconds each are what we call "2nd angle", this is a very dumb way to merge them. Do we really need to "fill" the rest of that angle with the same video signal? If we do, that is not an option for me.
One of the reasons I converted my BD into Matroska was to remove dubbing tracks that I wasn't using. Now I am facing a problem that is simply wasting a lot more space.
I suppose if those individual files that are "called" by the player when we are accessing the 2nd angle are converted to Matroska and I attempt to merge only them into one MKV file (already using one angle), I won't be able to tell in what specific time of that episode (10m25s could be one, 22m27s another) they might be used.
Any ideas? :)
http://forum.doom9.org/showthread.php?t=144611&page=14
But now that I looked the Matroska FAQ, there's an entry saying we need to use MKVMerge to do this job.
15) Does Matroska support multi-angle video files (multiple video streams in one matroska file)?
yes, you can create such files with gabest's mkv muxer in graphedit or mkvmerge. playback works with Haali's mkv splitter in directshowThere are some things I would like to know, because while merging two video angles worked for me for the first time, it created another problem.
Let me explain from the beginning.
This is the Star Trek/TOS on Blu-ray. Some specific scenes from all episodes have new special effects, while all other scenes are normal and don't have it, being the same in both cases.
If you change the video angle you will find out they look exactly the same (I believed one was SD and the other High Def, but that was not the case). Those specific scenes (featuring new or old special effects) are even on a single file with 100 MB each, for example. They are not "mixed" with the rest. When you play them, you will notice they are not attached with any part of the episode - and are all alone.
When we are playing this disc, using TMT (from Arcsoft), for example, the player reads the interval between 00044.m2ts and 00098.m2ts which is about 8 GB of size, from that episode.
00000.mpls can ignore the files between that interval that are only featuring the new special effects, and vice versa.
When we change the video angle, TMT reads the 00000.mpls instruction which uses the exact files from the interval 00044.m2ts and 00098.m2ts but instead of doing this:
00044.m2ts >>> 00046.m2ts >>> 00047.m2ts until 00098.m2ts = Episode with old special effects
It will do that:
00044.m2ts >>> 00045.m2ts >>> 00046.m2ts >>> 00047.m2ts until 00098.m2ts = Episode with new special effects - note the file 00045.m2ts with 100 MB of size was called by the playerWe don't have each episode duplicated on the disc.
It's a bunch of files with all the new and old special effects (there aren't many). The player just seeks specific files when asked to change the video angle, and after that file is used, the episode continues reading the 1st angle, while it might appear it is reading the second.
Then what is the problem?
MakeMKV is capable of saving all angles if asked, but it will only save the ENTIRE VIDEO + the angles desired. It will not separate them (this is not possible, considering that one of the special effects might be linked to the full video). The others might be located on individual files, as explained above.
Do you know what I mean? And by default, MakeMKV is disabling the 2nd angle of all episodes (not sure why).
That means, I will end up having one 8 GB file with the new special effects and another 8 GB file with the old special effects.
MKVMerge is going to waste 15/16 GB and save both videos into a single file, with 2 video angles. But that is only an option when the 2nd angle is 99% different from the first. Not 5% (my case).
If we have a 50 min episode where 3 or 4 scenes that are wasting no more than 30 seconds each are what we call "2nd angle", this is a very dumb way to merge them. Do we really need to "fill" the rest of that angle with the same video signal? If we do, that is not an option for me.
One of the reasons I converted my BD into Matroska was to remove dubbing tracks that I wasn't using. Now I am facing a problem that is simply wasting a lot more space.
I suppose if those individual files that are "called" by the player when we are accessing the 2nd angle are converted to Matroska and I attempt to merge only them into one MKV file (already using one angle), I won't be able to tell in what specific time of that episode (10m25s could be one, 22m27s another) they might be used.
Any ideas? :)