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Old 3rd March 2014, 12:20   #7761  |  Link
detroit1
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I have used multiavchd for a long time and it works as far as the video but I noticed if I have LCPM 5.1 files, it always downconverts it to a very low ac3 at 128kbps

I have all the boxes unchecked unter author and audio

It is supposed to just pass thru and keep the LPCM 5.1

does anyone know how to correct this?

that is the only flaw I see with this
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Old 3rd March 2014, 14:29   #7762  |  Link
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Quote:
Originally Posted by detroit1 View Post
... I noticed if I have LCPM 5.1 files, it always downconverts it to a very low ac3 at 128kbps

I have all the boxes unchecked unter author and audio

It is supposed to just pass thru and keep the LPCM 5.1

does anyone know how to correct this?
I don't know for sure, but aren't you setting a target size?
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Old 3rd March 2014, 15:07   #7763  |  Link
detroit1
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even if I get a target size, what does that have to do with the program downgrading the LPCM 5.1 audio?

It is supposed to just pass thru

I have also noticed that some smaller bitrate video files with pass thru right but other files that have video bit rates of over 15 will convert to the lower 128kbps

that also does not make sense as the Video size should have nothing to do with the audio conversion or pass thru
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Old 4th March 2014, 05:09   #7764  |  Link
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This is from a looong time ago, but IIRC this has something to do with the version of tsMuxer that MultiAVCHD uses, which can't handle or (de-)mux pcm audio properly. Also I remember there was a cli tool called "pcm2tsmux" or something that could fix a certain pcm problem before remuxing again. Not sure if it had something to do with endianness. Again, this is ages ago for me.
Maybe you want to try the latest tsMuxer manually; I understand pcm audio is no problem now.

cheers
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Old 4th March 2014, 05:52   #7765  |  Link
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I've been searching every set of terms I can think of with no luck finding an answer.

I've got a 31gb BD. I can burn it as 31gb, I can view the files under Windows and it is 31gb.
When I load it in reauthor mode of multiAVCHD, the initial size before I start blanking unnecessary segments and audio tracks is nearly 50gb.

After I blank what I want, it SHOULD come in small enough for a BD25, except it is now around 30gb again.
The outputted BD files include a half dozen new large .m2ts files that weren't on the original disc.

Any idea what could be causing this?
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Old 4th March 2014, 11:30   #7766  |  Link
detroit1
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if you use tsmuxer you won't have the menu and chapters that the multiavchd has

I know tsmuxer by itself will handle the lpcm

does tsmuxer create chapters for each clip?
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Old 5th March 2014, 04:41   #7767  |  Link
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@ detroit1

True, with tsMuxer you will not have a menu.
At the Blu-ray tab, you can manually set or copy/paste chapter times.
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Old 5th March 2014, 15:52   #7768  |  Link
detroit1
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not having a menu is not good and it would be more work to manually put in chapters for every clip if you use tsmuxer
mutliavchd has that option to automatically add chapters

what about creating the blu-ray folder and manually being able to put in the clips iwith lpcm 5.1
I thought I have heard of being able to create the folder structure and then put in the files
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Old 5th March 2014, 17:12   #7769  |  Link
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Quote:
Originally Posted by detroit1 View Post
even if I get a target size, what does that have to do with the program downgrading the LPCM 5.1 audio?
Well, LPCM in 6 channels takes a lot of space, better used for video.
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Old 5th March 2014, 18:02   #7770  |  Link
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Quote:
Originally Posted by Ghitulescu View Post
Well, LPCM in 6 channels takes a lot of space, better used for video.
Amen.
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Old 6th March 2014, 05:00   #7771  |  Link
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I definately can imagine wanting to keep original audio (or compress it losslessly).

Quote:
Originally Posted by detroit1 View Post
mutliavchd has that option to automatically add chapters
tsMuxer can do that to. If you take a look at the options, you can choose to insert chapterpoints every user-given minutes. If your input file has chapters, tsMuxer will recognize them and adjust the chapterlist automatically. And - as said - you can copy/paste chaptertimes into the list, should you have the timings in a textfile or something.
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Old 6th March 2014, 05:21   #7772  |  Link
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Not to beat a dead horse, but seriously? No one has seen a BD imported for reauthoring increase in size?
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Old 6th March 2014, 20:53   #7773  |  Link
detroit1
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what is strange is that some files with lpcm 5.1 will pass thru like normal and others it will try to use eac to converto ac3

makes no sense. I know I have all the boxes unchecked; you have to in order for it to pass thru the lpcm 5.1
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Old 6th March 2014, 23:25   #7774  |  Link
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Quote:
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what is strange is that some files with lpcm 5.1 will pass thru like normal and others it will try to use eac to converto ac3
Maybe linked to big/little endian, as von Suppé suggested.
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Not sure if it had something to do with endianness.
You can see with MediaInfo if you waves are in big or little endian.
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Old 7th March 2014, 02:10   #7775  |  Link
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I checked and they are big indian

also, I had 2 different files with big indian and 1 worked with pass thru lpcm and other did the eac convert to ac3 so I don't think that is it
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Old 7th March 2014, 05:13   #7776  |  Link
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also, I had 2 different files with big indian and 1 worked with pass thru lpcm and other did the eac convert to ac3 ...
I had to ask this in my first reply but I just realise now by reading over:
Maybe the "faulty" lpcm stream isn't blu-ray compatible in terms of bitrate/bitdepth/samplerate? Then MultiAVCHD will auto re-encode of course. First thing to make sure actually...

Or there's something else jiffy then with some pcm streams. Maybe a header thing... I can't tell.
I know from the past that sometimes plain remuxing handled some issues.
Maybe you can give this a try? Take the one file where lpcm passthru don't work. Load this file in the newest version of tsMuxer (if source is BD folder, select proper mpls: chapters are recognized then). Select wanted streams and mux into BD folder structure again.

Add this output into MultiAVCHD and see if passthru now works. Maybe by remuxing the newer tsMuxer has set something straight or at least did something to make the older tsMuxer to work.
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Old 7th March 2014, 05:30   #7777  |  Link
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Quote:
Originally Posted by DoctorM View Post
The outputted BD files include a half dozen new large .m2ts files that weren't on the original disc.
Well, m2ts files can be big in (re-)authoring. If you play these new m2ts files, does the content have anything to do with the source disk?
Or try to reinstall MultiAVCHD. Saved me a couple of times.
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Old 7th March 2014, 15:10   #7778  |  Link
detroit1
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I tried to put the file into tsmuxer and then use multiavchd; same result. It is trying to convert lpcm to ac3
this seems to be random. some files pass thru the right way and others have this audio convert problem
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Old 7th March 2014, 15:20   #7779  |  Link
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Are you sure there are not in 44,1 khz ?
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Old 7th March 2014, 16:05   #7780  |  Link
detroit1
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Here is a sample mediainfo from 1 of the files that does pass thru on multiavchd


Format : BDAV
Format/Info : Blu-ray Video
File size : 672 MiB
Duration : 4mn 44s
Overall bit rate mode : Variable
Overall bit rate : 19.8 Mbps
Maximum Overall bit rate : 35.5 Mbps

Video
ID : 4113 (0x1011)
Menu ID : 1 (0x1)
Format : MPEG Video
Format version : Version 2
Format profile : Main@High
Format settings, BVOP : No
Format settings, Matrix : Default
Format settings, GOP : N=12
Codec ID : 2
Duration : 4mn 45s
Bit rate mode : Variable
Bit rate : 12.1 Mbps
Maximum bit rate : 20.0 Mbps
Width : 1 920 pixels
Height : 1 080 pixels
Display aspect ratio : 16:9
Frame rate : 25.000 fps
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Progressive
Compression mode : Lossy
Bits/(Pixel*Frame) : 0.233
Time code of first frame : 00:00:00:00
Time code source : Group of pictures header
Stream size : 411 MiB (61%)

Audio
ID : 4352 (0x1100)
Menu ID : 1 (0x1)
Format : PCM
Format settings, Endianness : Big
Format settings, Sign : Signed
Muxing mode : Blu-ray
Codec ID : 128
Duration : 4mn 44s
Bit rate mode : Constant
Bit rate : 6 912 Kbps
Channel(s) : 6 channels
Channel positions : Front: L C R, Side: L R, LFE
Sampling rate : 48.0 KHz
Bit depth : 24 bits
Stream size : 235 MiB (35%)
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