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19th September 2017, 23:52 | #22181 | Link |
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The purpose of mixing is to "fold" all the audio channels into the ones to be output, so they won't be lost.
The channel levels settings do what is explained in the LAV GUI: they control the level of individual channels when downmixing. For example if you downmix to stereo and set one of the settings to 0, you won't hear that/those channel(s). I suggest to test with this file: https://www.sendspace.com/file/ftt56e
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HTPC: Windows 10 22H2, MediaPortal 1, LAV Filters/ReClock/madVR. DVB-C TV, Panasonic GT60, Denon 2310, Core 2 Duo E7400 oc'd, GeForce 1050 Ti 536.40 |
20th September 2017, 17:57 | #22182 | Link | |
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20th September 2017, 18:07 | #22183 | Link |
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Yep, although I normally use 1.0 for centre just because so many films seem to be mixed with low and/or muffled voice tracks these days.
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23rd September 2017, 16:36 | #22186 | Link |
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strumf666: I believe you are confused. Sunspark is discussing downmix coefficients for a stereo output.
Sunspark: yes, this is correct. 1.58 is +4 dB, which is mixed into both channels, thus becoming +10 dB total after the sub downmixes it down to mono, pursuant to ITU-R BS.775. It checks out. (If you are using a cheap "PC" 2.1 system you might want to lower it though, as such levels are likely to overload your subwoofer. You need a system with high SPL output to be able to take full advantage of LFE.) |
24th September 2017, 05:12 | #22187 | Link | |
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Quote:
I set Windows volume to 65% and use the volume control on the speakers the rest of the way. Bass dial on the back is set to about 1/3 of turnable range I think. You make a good point about other systems maybe having trouble. Last edited by Sunspark; 24th September 2017 at 05:28. |
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24th September 2017, 19:17 | #22188 | Link |
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An alternative if you know the real specifications of your speakers is to use Windows' native Bass management (in "enhancements" tab in Sound control panel) to filter the low frequencies your subwoofer or full range speakers can't manage, that way you can include the LFE channel without worrying about it causing problems.
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HTPC: Windows 10 22H2, MediaPortal 1, LAV Filters/ReClock/madVR. DVB-C TV, Panasonic GT60, Denon 2310, Core 2 Duo E7400 oc'd, GeForce 1050 Ti 536.40 |
29th September 2017, 22:47 | #22190 | Link |
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Can it be used together with ffdshow? Or does it collide with it? Because I still have ffdshow installed since the past.
Can it be used as DirectShowSource for mkv files in avisynth? While TMPGEnc 6 reads the mkv with frameaccurate audiosync, the reader of avisynth (ffms2, l-smash) all have 5 to 13 frames here and there difference in audiosync. I could reduce it to 5 frames by adding the fps of the video to the reader. But still: TMPGEnc reads them frameaccurate. I think TMPGEnc's Intel Media SDK Decoder reads the timecodes of the MKV, while avisynth indexes the file which gives slightly wrong results? Can I circumvate this with these filters maybe? |
30th September 2017, 02:41 | #22192 | Link |
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i have a file that doesn't play correctly with avcodec using lavfilter but it is fine when i use "use microsoft WMV9..." or DXVA2 so should i bring it directly to ffmpeg or is this here the right place for a wrongly decoded file?
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30th September 2017, 07:18 | #22194 | Link |
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The FFmpeg software VC-1/WMV3 decoder not being perfect is known. Why would you want to use it anyway? Thats what the Microsoft MFT is for.
As long as it works fine using DXVA2 (which uses parts of the FFmpeg decoder), its not something I'm really interested in.
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LAV Filters - open source ffmpeg based media splitter and decoders Last edited by nevcairiel; 30th September 2017 at 07:23. |
3rd October 2017, 17:07 | #22197 | Link |
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I notice some weird behavior with D3D11VA copyback: It roughly has twice as high CPU usage as DXVA2 copyback.
With EVR in MPC HC, this is just ~2% vs. ~4% CPU usage, but with madVR, it's ~6% vs ~12% (4k 50fps HEVC 10 bit video). |
5th October 2017, 18:32 | #22198 | Link |
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D3d11 option improve svp smoothness
Hello first of all I want to thank Nevcairiel and all those who help in the development of lav filters, I use them a long time along with other programs like MPcBe, Madvr, Svp. Many of you know that achieving a perfect reproduction not only depends of the hardware, but also good software, and last but not least, spend a good time to setting up all. This often provokes us headaches when a specific setting changes something that works or even when we not knows what setting made the change.That being said , I have a question to Nevcairiel or someone that can explaind, I use SVP generally for 1080p videos upscale to 4k, and playing around with lav settings , change to d3d11 option in hardware acceleration this improve so much the smoothness, and I really wanna know why or how , or even if that made the change.
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6th October 2017, 10:17 | #22199 | Link |
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Hi!
Did/does (doesn't have to be new) anyone make a build of LAV with a differing ID? I'm asking because I want two instances with different settings. Or do I not need to do this? Can I just register another LAV instance in a different folder and have different settings? It doesn't seem likely to me, even LAV 32 and 64 bit share the same settings... |
6th October 2017, 13:57 | #22200 | Link |
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Okay, so I tried some ugly tinkering: copied the LAV folder created registry keys for it with the new location and a changed CLSID. And then selected it in ProgDVB.
Well, my intention didn't happen, but something weird started happening: madVR started showing DXVA so I guess it started decoding itself somehow. Also deinterlacing started working. Which are desirable, but I don't why it happens or how long will it work. Does anyone have an idea what's happening? |
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decoders, directshow, filters, splitter |
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