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Author Topic: Regarding blu-ray playback  (Read 1460 times)
McCrash
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« on: December 13, 2010, 04:23:16 pm »

Hi there,

After reading some posts around here , I decided to test blu-ray playback for my own needs.

Playback of the main movie indeed works with the bdmv or iso approach. I decided i like the iso approach best but in order to make my iso file smaller i decided to test removing all the unecessary .m2ts files and keep only the largest of them. To my surpise the movie playback still worked but it lacked a company logo intro at the very beginning of the movie. I suppose that means there is somehwere a logical playback sequence that the mede8rer seems to follow, instead of just playing the largest file.

Any comment on this ? Thanks you.
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jer1956
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« Reply #1 on: December 14, 2010, 11:49:23 am »

Bluray may  be like DVD in that it's possible for sections to have a header of some kind which indicates to the player that  skip, fast forward etc. should be disabled. That's how they force you to watch piracy warnings and adverts. Now you could produce a  player which only plays sections without those restrictions,  i.e  movies.
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McCrash
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« Reply #2 on: December 14, 2010, 12:08:56 pm »

Yeah but the mede8er not being a blu-ray licenced player in anyway probably doesn't respect anything like that. In this case it was a criterion collection introduction, not a warning of some sort.

My real concern here is that the mede8er played 2 different m2ts files one after the other because something in the bdmv structure told him to. And i fear in some case i might remove a m2ts file that is indeed necesseray in the playback sequence. So have i to check the m2ts file content instead of 'just' keeping the largest file.
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Domino1999
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« Reply #3 on: December 14, 2010, 01:06:38 pm »

My real concern here is that the mede8er played 2 different m2ts files one after the other because something in the bdmv structure told him to. And i fear in some case i might remove a m2ts file that is indeed necesseray in the playback sequence. So have i to check the m2ts file content instead of 'just' keeping the largest file.

Absolutely right! An example of this is Sherlock Holmes blu-ray movie. I extracted just the largest .m2ts file, but this was actually the movie plus the director's commentary, so I then had to try other m2ts files to find the correct one, which was a very time consuming process.
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Mede8er model: MED500X
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jer1956
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« Reply #4 on: December 15, 2010, 01:16:40 pm »

You need this:-
http://www.cinemasquid.com/blu-ray/tools/bdinfo

As used  here:-
http://forum.slysoft.com/showpost.php?p=126139&postcount=13
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McCrash
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« Reply #5 on: December 15, 2010, 02:53:12 pm »

Ah yes ! I should have though somebody wrote a tool like that. So the sequence is the .mpls then.
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jer1956
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« Reply #6 on: December 15, 2010, 03:20:39 pm »

By the way don't try and stream iso's. I've only just progressed to ripping bluray (for test purposes only!) after installing AnyDVD HD to get round the lack of HDCP in my PC monitor. The first thing I tried was to create an iso using Anydvd. It stuttered like anything with my very efficient network. I just copied the largest transport stream to the PC hard drive instead (purely as a test) and streamed that. Not a problem for my network.

The issue is that optical disk file formats/packages are native to the chip and can be fed directly to it. MKV's, ISO's etc are not, and have to be unwrapped by the puny support processor at the very time your wanting to use it to stream at 40 mbps!  It can't do both at such bitrates.

When you look at TSmuxer it could be creating an MKV rather than a transport stream.. Chapter points, subtitles, both are included. All picked up if you pick an MPLS file rather than the TS. Both in a format which I've streamed  at 40mbps, with all audio channels intact. I won't be bothering with MKV.
« Last Edit: December 16, 2010, 01:25:11 pm by jer1956 » Logged
McCrash
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« Reply #7 on: December 16, 2010, 03:41:11 pm »

I like the idea to keep a blu-ray with the menu and the main movie. Menu playback is just coming to every new media players in a year or two.
I tried Clown BD Copier, the unwanted m2ts files end up with a size of 6kb, instead of being removed which is nice.
« Last Edit: December 16, 2010, 05:04:00 pm by McCrash » Logged
jer1956
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« Reply #8 on: December 16, 2010, 05:49:05 pm »

I just tried using Tsmuxer to create the bluray directories on my PC for streaming. I then used the Play Folder option that comes up when you select a directory containing those files. It stuttered. Browse to the folder and play the m2ts and it dosn't. Even using that function is enough to burden the support processor with too much work. I can understand unwraping a package like ISO or MKV to get at the files being a problem, but in folder play mode the files are just sitting there. This looks more and more like  a task management problem rather than an overload problem. Something is getting more time than it needs at the expence of handling streaming.  

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McCrash
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« Reply #9 on: December 16, 2010, 06:08:35 pm »

That's strange, i understand there should be a difference between playing a folder and playing a iso but between the folder and the files... Anyway i gave up network playback for hight bitrate, i use external usb, less hassle there.
The good point with iso is that you can reverse to bdmv.
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rockr
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« Reply #10 on: December 16, 2010, 06:09:36 pm »

.....This looks more and more like  a task management problem rather than an overload problem. Something is getting more time than it needs at the expence of handling streaming.  

yes. for that need extra memory, and in this moment is occupied witth something else. also, the power of procesor is busy with that somethging else. sometimes when you repeat your action with a accepted file that refused to work from first time, maybe you,ll succeed with a second action
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