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29th July 2012, 19:20 | #11821 | Link | |
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Yeah, and i like spending my sundays reading pages of documentation on a topic which is totally irrelevant to the point.
Just to repeat the point: LFE mixing is disable by default, and anyone that enables it can set the value to whatever he deems correct. This is even in accordance with the Dolby spec you cited, in fact directly after you quote: Quote:
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LAV Filters - open source ffmpeg based media splitter and decoders Last edited by nevcairiel; 29th July 2012 at 19:29. Reason: clarify |
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29th July 2012, 21:07 | #11822 | Link |
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just give the kid the candy he wants, up the limit to 2.5 >,> but leave the default settings to either 0 or 1.
also can i ask for a master volume with a gain boost? like 200% or so, so i can lower the master control of the soundcard a tad lower, as it is i need to up the volume from 30% to 40% from the master control even if MPC is set to 100%. or simply put i want MPC to sound louder than the other sound sources set at the same level. Last edited by kitame; 29th July 2012 at 21:11. |
29th July 2012, 21:09 | #11823 | Link |
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Well said Nev
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30th July 2012, 01:39 | #11824 | Link | |
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Quote:
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30th July 2012, 10:16 | #11826 | Link | |
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30th July 2012, 10:25 | #11827 | Link |
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Strange, I've never seen that. If the application's sound is going through the mixer, the control should be there, which applications are these?
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30th July 2012, 11:00 | #11828 | Link | ||
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Quote:
Quote:
I understand that most PC speakers shouldn't be receiving LFE since they can't handle the frequencies, so maybe you could have the default being 2.24 but then a tickbox saying "mix LFE" that is off by default and greys out the slider? That way users that want LFE can just tick the box and get the correct setting, rather than having to research what the correct setting actually is. Or, have "suggestions" written underneath the sliders?
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30th July 2012, 11:16 | #11829 | Link | |
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Quote:
For the slider, it'll remain as-is and there won't be an extra checkbox. I already changed it to accept a higher range of values (up to 3.0). The problem with the additional dynamic range on the LFE channel is that when you increase the volume by +10dB in the digital signal, you either may get clipping on those "loud bass thumps", or the overall volume of the other channels reduces as clipping protection is engaged, so ideally the volume should be changed as the last step, possibly in the analog domain. If you use a normalized matrix and set a 2.24 coeff for LFE, the volume of all other channels will be *significantly* reduced, so i would never recommend that. If you don't use the normalized matrix but clipping protection instead, it of course depends on how strong the LFE signal really is, but if that 10dB extra head room is actually used, it may also result in a significant volume loss in the middle of an action scene. Anyway, in theory there always are "perfect" settings, in practice however the "standard" just has a lot of drawbacks. The 10dB offset was introduced to allow retaining the full dynamic range in the other channels, while giving the LFE channel a chance to have more volume. If you downmix with that 10dB taken into account, you basically just revert this advantage and reduce the dynamic range of all other channels - thats just not even close to "perfect". Anyway, i really don't want to spend more time discussing this. I increased the configuration scale, and you can configure it to whatever you think is perfect. Every minute i spent here arguing, is one minute i cannot spent on developing stuff, so i'll go back to developing stuff.
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LAV Filters - open source ffmpeg based media splitter and decoders Last edited by nevcairiel; 30th July 2012 at 11:27. |
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30th July 2012, 14:20 | #11830 | Link |
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Is there a way to set all levels to the same defaults like ffdshow, ac3filter, etc. without using a registry hack? (i.e. center = lfe = 1/sqrt(2), surround = 1) With the sliders i cannot achieve accurate values. Probably even hitting exactly 1 gets difficult now with the expanded range.
Is there any intention to make lav audio sound differently than other filters? (lfe = 0 is fine too, of course) |
30th July 2012, 14:56 | #11831 | Link | |
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Quote:
they're emulators. |
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30th July 2012, 15:30 | #11832 | Link | |
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Quote:
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30th July 2012, 21:26 | #11833 | Link | |
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I've released a new version that should handle the current problems. It has more robust code so I recommend using it on production drivers. Also fixed some a/v sync issue (not relevant to LAV filters). For LAV to work with the new DLL under the problematic driver, it needs to disable most of the multithreading features (e.g. just keep MT copy). I hope Nev will not produce such an ugly workaround. A dialog with QS options in LAV would be nice for testing purposes though...
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31st July 2012, 04:07 | #11835 | Link |
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If you're bitstreaming, LAV is not upsampling. What you're seeing there, the "output" information, is normal for bitstreaming DTS-HD. If there is any upmixing that you're having is not from your PC, it's from your receiver.
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31st July 2012, 04:37 | #11836 | Link |
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Regarding the channels you are correct , I can see it on the AVR that it is being fed only 5.1 (and the receiver is upmixing it to 7.1), so the info display in potplayer seems to be broken (or I don't understand why it doesn't show same as source). Regarding the sample frequency I can not see it on the receiver so I can not verify it.
Another test with a DD 2.0 source: And regular DTS: edit: Another question - The aspect ratio and output resolution differs in all three screenshots is that normal/bug as well or have I set something wrong? Last edited by strumf666; 31st July 2012 at 04:53. |
31st July 2012, 05:01 | #11837 | Link |
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If you're bitstreaming, it's simply not upsampling. There's no way it can even do that (besides decoding->upsampling->reencoding, which is impossible with DTS-HD right now).
Re: aspect ratio, it seems your player is set to somehow stretch horizontally to screen width, which I assume is 2048 pixels. There's no option to preserve original AR?
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31st July 2012, 05:19 | #11838 | Link |
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Both my screens are the standard 192x1080 so I am not really sure why the stretching.
Or is it a bug again? I don't seem to remember having noticed the non-matching output until I started using lav+madvr in potplayer. Now I am not sure if the problem is with potplayer od madvr and/or lav. Last edited by strumf666; 31st July 2012 at 05:35. |
31st July 2012, 06:52 | #11840 | Link |
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This is a failure in PotPlayers OSD. Most video decoders will output it as 2048, because the renderer asks for that (better alignment). However, the extra pixels are empty padding and the renderer will not show it. Don't trust such an OSD at face value if you don't know how to interpret it properly
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LAV Filters - open source ffmpeg based media splitter and decoders |
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decoders, directshow, filters, splitter |
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