trying to extract the 7.1 channels (8 channels) from Blu-ray disc

[billsantos]

Hi All, First time poster here and I have something seemingly simple that I'm trying to do with little success so far. I am trying to extract the 8 surround sound channels of 7.1 into wave format from a Blu-ray disc. I had much success with such an extraction when I used DVD's and a program called "DVD Audio Extractor", but I have yet to come across anything that will do the same for Blu-ray. The closest I have been able to get is with a program called tsMuxeR. I can take a random m2ts file (from the Blu-ray disc) as an input file to tsMuxeR. The program reports that some files are ignored and I end up with 4 audio files: one is reported as "DTS-HD which gives bitrate of 768Kpbs core plus MLP data Sample rate 48 Khz Channels 7.1 (DTS Master Audio)". The other 3 audio files are simply various other languages with AC3 codec and I don't think they're the ones I'm looking for. When I try to demux the DTS-HD file, I end up with the same type of file just with a different name. I have a couple of questions: 1) Is the DTS file the one I'm looking for in order to separate out the 8 channel audio and 2) how do I do this? I've tried to be as thorough as possible and look forward to any help. Thanks in advance, bill

[redwudz]

There isn't a WAV file on a BD to extract. You would need to extract one of the other type audio files and convert it to WAV. It will be a huge file. Not sure why you would want to do that. You can probably convert the DTS-HD file into a WAV file. Demuxing will just give you the files as they are. You need to convert them if you want WAV.

Not sure how to convert to WAV from there, but others here would likely know.

And welcome to our forums.

[billsantos]

Thanks. I've been trying to use the GUI version of eac3to to do both steps: get the desired DTS file (with the built in tsMuxeR) , which it has, and then convert that to wav using eac3to. I am ending up with a wave file, but it lacks all of the 8 channels. I'm thinking it's because I'm using the built-in decoder (libav), but I could also not be setting the program variables correctly (and there are a LOT of variables!). I tried visiting the Doom9 forum about various decoders, but I am confused as to which one to use to get all of the 8 channels from the source DTS-HD file. Nero and Sonic are listed as the better decoders, but the link to the Doom9 info on them is confusing (and not recent being 2008). More help would be appreciated. Thanks. Bill