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25th March 2010, 21:49 | #9861 | Link | ||
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http://sourceforge.net/projects/flac/files/ You need to download the "flac-x.x.x-devel-win.zip" file. That's the only one where the libFlac.dll file is in. |
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26th March 2010, 03:17 | #9862 | Link | |
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fl' = FL + sqr(2)/2 x FC + BL fr' = FR + 0.7071 x FC + BR now we have the same acustic power for FC when add the part in FL and FR. If all channels have a peak at same time we can have overflow reaching values until 2.7071, then we need divide the coefficients by 2.7071: 1/2.7071 = 0.3694 0.7071/2.7071 = 0.2612 fl' = 0.3694 x FL + 0.2612 x FC + 0.3694 x BL fr' = 0.3694 x FR + 0.2612 x FC + 0.3694 x BR Now the max value is: 0.3694 + 0.2612 + 0.3694 = 1 After the downmix is recommended a Normalize to avoid low volume.
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26th March 2010, 09:10 | #9863 | Link | ||
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Now the big question is: How should I make this available in eac3to? Right now "-down2" invokes Dolby ProLogic II. How should I name the options for Dolby ProLogic II and for this other downmixing matrix? Maybe I should use "-down2" for the normal matrix and "-downDpl2" for Dolby ProLogic II? Any other suggestions? Quote:
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26th March 2010, 09:33 | #9864 | Link |
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Hello.
Question about use. If i want to extract the raw video track from an .mts/.m2ts file, to get an untouched raw video data stream, to be able to use it later in authoring SW like Scenarist. Is the following enough : eac3to file.mts -demux or, is there others options to add ? (Maybe to extract only video if possible). If i want the results file(s) to be put on another place than the source file, what the command line should be ? Thanks. |
26th March 2010, 15:36 | #9865 | Link | ||
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fl' = FL + 0.7071 x FC + 0.866 x BL + 0.5 x BR fr' = FR + 0.7071 x FC - 0.5 x BL - 0.866 x BR
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26th March 2010, 16:30 | #9866 | Link |
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Let's say, I create an MKV which contains DTS audio, encoded from 16-bit .WAVs. When I demux the MKV with eac3to, this always "patches" the demuxed DTS to "24-bits". What is the point of this behavior?
Last edited by Midzuki; 26th March 2010 at 16:57. |
26th March 2010, 17:03 | #9867 | Link | |
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Remember that a 16-bit PCM source is itself an approximation of an analog waveform, and as such is inaccurate because of the 16-bit quantization.
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- SomeJoe Last edited by SomeJoe; 26th March 2010 at 17:08. |
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26th March 2010, 17:12 | #9868 | Link | |
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Then decode to 24 bits is always better than decode to 16 bits, BTW if you want only 16 bits you can add -down16. edit: I don't see the SomeJoe post with, more or less, the same thing.
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BeHappy, AviSynth audio transcoder. Last edited by tebasuna51; 26th March 2010 at 17:15. |
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26th March 2010, 18:07 | #9869 | Link |
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@madshi in my opinion we should have:
Code:
-down2stereo -down2dpl -down2dpl2 -lfe also for everybody to be happy i think you should also give full access to the mixer with something like: Code:
-down2custom 1v0.3694,3v0.2612,5v0.3694 2v0.3694,3v0.2612,6v0.3694 for example a 3ch (FL,FR,FC) to stereo will luke like: Code:
-down2custom 1v0.5858,3v0.4142 2v0.5858,3v0.4142 |
26th March 2010, 18:44 | #9870 | Link | |
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A 'Quadro' audio (2/2.0 : FL,FR,BL,BR) can be downmixed to Dpl2 with: Code:
-down2custom 1v1.0000,3v0.8660,4v0.5000 2v1.000,3v-0.5000,4v-0.8660
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26th March 2010, 19:28 | #9871 | Link | |
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26th March 2010, 21:56 | #9872 | Link | ||
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tebasuna51 wrote:
Quote:
SomeJoe wrote: Quote:
Anyway, thanks for the accurate answers. Actually, I was expecting to receive an answer from madshi himself, but it seems he really is "much busier" than I thought. |
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26th March 2010, 22:47 | #9874 | Link | |
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i was sending pm to Midzuki telling that i have few dvds where olaying DTS from video_ts folder my receiver/decoder inform in the display: 24b..this info stay there until the dvd end! others dvds don't inform and i don't know how to encode in 24b. i need lessons and explanations about this informations. how and what program can be used to do that?!? Porcupine Tree is one of my DVDs that give 24b info, i have others! @ Midzuki i could not resisit to post here too but i'm waiting yours infos too. |
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26th March 2010, 22:48 | #9875 | Link |
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I already knew that, since DTS "Digital Surround" is a lossy format. BUT, a binary file-comparison between a 16-bit DTS and a "patched-to-24-bits" DTS shows they are different beasts (on a "frame-by-frame" level, I think).
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27th March 2010, 03:32 | #9878 | Link |
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One more time, AC3/DTS standard (lossy) don't have bitdepth. The parameter quality for this files is the bitrate, forget the bitdepth.
Only DTS have a value in the header than say the bitdepth of the source wav files used to create the dts. And Surcode put always 24 bits also when source wavs is 16 bits, then is a useless info. I say to madshi don't put this info (sometimes wrong) with dts files because confuse the users, like you can see. AC3/DTS files must be decoded to, at least, 24 bit to obtain the best aproach to the source, no matter the original bitdepth.
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27th March 2010, 04:43 | #9879 | Link |
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ok tebasuna,
i was curious based on some informations from my decoder like i posted here: http://forum.doom9.org/showthread.ph...84#post1386384 to tell the true i was not only confused, i was really lost with that infos. thanks so much! |
27th March 2010, 06:20 | #9880 | Link | |
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" 'dumb' DTS decoders ". |
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