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27th October 2012, 13:08 | #12643 | Link | |||||||
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By your logic and reading between lines, LAV Decoders have a merit higher than MOST decoders, but not all because "This means that if a format is enabled in ffdshow settings, ffdshow will get used". So LAV Filters actually is incompatible with ffdshow, you gotta either, disable all the decoders in ffdshow, lower ffdshow merit, raise LAVFilters merit, or block in MPC-HC which is the way I chose. So if nevcairiel recommends a tutorial where the third option is promoted, what way do you think I am going to take? Unless you give a founded reason there is no incovenient to use any of the 4 options. |
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27th October 2012, 15:40 | #12644 | Link | |
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That means LFE level matching is done at the last possible stage. When using a surround sound system this is normally done by the power amplifier. When downmixing this is done when the LFE channel is removed (mixed). What nevcairiel is afraid of is that the 7dB LFE boost translates to a -7dB attenuation for other channels when downmixing with a normalized matrix. This means you're losing 7dB of dynamic range, you're raising your signal source noise floor by 7dB, and you might run into maximum gain issues. Whether or not this is an issue depends heavily on the hardware you're using. You can also try without normalizing, in which case you get the correct LFE level and no dynamic range reduction, but you risk clipping. That said, I think that standard stereo downmix of 5.1 content is not allowed to clip per Dolby specifications. Last edited by e-t172; 27th October 2012 at 15:43. |
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27th October 2012, 16:07 | #12645 | Link |
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Still, check to the filter chain, after LAV Audio, were no other audio filters, which can not handle 32 float. Examples: Mixing AC3 5.1 in stereo (not normalized matrix): LAVSplitter -> LAVAudio - Dump no clipping LAVSplitter -> LAVAudio -> ffdshow Audio Processor (enabled: Volume -> Master volume: 99%) - Dump clipping |
27th October 2012, 16:21 | #12646 | Link |
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Microsoft's AC-3 has a special laptop mode that applies a 11dB gain. I don't know if that applies to just Center or all channels.
http://support.microsoft.com/kb/944436 I would be interesting to see a comparison of stereo output of MS/LAV/ffdshow. Currently the Center level allows a maximum gain of 3dB compared to normal value. Would it make sense to allow higher values like was done for LFE?
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MPC-HC 2.2.1 |
27th October 2012, 16:30 | #12647 | Link | |
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But if your prefer LAV decoders, then you don't actually need ffdshow at all. There is no point in installing it if you block it later on.
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27th October 2012, 16:49 | #12648 | Link | |
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But still I don't understand why you are so against raising LAVFilters merit (or lowering other decoders'). It's much easier, unless there's any drawback you haven't told me until now. |
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27th October 2012, 20:54 | #12649 | Link | |
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Simply because FFDShow's Audio Decoder by default has a higher merit than the LAV Audio Decoder. Either uninstall FFDShow (do you really still need it?), disable specific formats in the "Codecs"-section, or lower FFDShow's merit settings, for LAV Filters to take over.
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I don't know about you, but I can perfectly play videos where LAV Filters does the splitting and FFDShow the decoding of the video and audio stream. Although there's still a few exotic formats for which LAV Splitter prefers to connect to LAV Video/Audio Decoder, LAV Splitter and FFDShow can get along just fine.
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27th October 2012, 23:19 | #12650 | Link | ||
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Yes sorry I had some confussion for when I couldn't split AVS with LAV but had to decode with ffdshow. |
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27th October 2012, 23:54 | #12651 | Link |
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Don't know if any of you guys have seen or not but the latest version of AnyDVD HD seems to have implemented a cool feature -
It adds a "disc.inf" file to the root of the Blu-ray disc that contains some basic information about the disc, this could be most useful on Blu-ray's that contain fake playlist protection (Which causes LAV to pick the wrong playlist) The correct playlist is listed in the "disc.inf" file, it looks like this - [disc] type=BD-ROM totalsectors=24382848 label=WARRIOR region=1 playlists=789, 790 Is this something that software like LAV/XBMC etc could read from to help choose the correct main movie playlist? Thanks for the latest update Nev! |
28th October 2012, 00:19 | #12653 | Link |
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LOL! I quit this pointless discussion. Never met anyone like you before.
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28th October 2012, 01:31 | #12655 | Link |
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No. That's what I'm saying, the player itself needs to support it. Nev said he looked at it but he doesn't have a screen pass disc so didn't see the playlist info. So maybe now that you posted one he might consider looking at it. At least for exposing just the valid playlists that the player can then pick from. It would make the non-commercial players infinitely more useful. Especially now where the commercial ones all have Cinavia.
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28th October 2012, 03:26 | #12656 | Link | ||||
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How are you dumping the audio for these images? (and what software is that?) |
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28th October 2012, 05:23 | #12657 | Link | ||
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In conjuction: LAV Audio (32 float) -> Win 7 Mixer (24 bit, 48000 Hz) -> Creative X-Fi (48000 Hz, Bit-Matched), even when playing the file with the overflow > 0dB (an example from the post above), I do not get clipping: Image 1 Image 2 If after LAV Audio (and before mixer Win) is going audio filter not capable of processing 32 float, then there will be clipping: Image 1 Image 2 I have got so. Quote:
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28th October 2012, 08:09 | #12659 | Link |
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Integer will always clip because you can't go over 100%. Which integer mode you use does not matter. Float on the other hand has no limitation on its value range, so you can go above 100% (which in float is 1.0), so a value of 1.1 is perfectly valid. The question just is how other components deal with this, and since DACs are typically integer, it needs to be converted at some point.
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28th October 2012, 08:22 | #12660 | Link | |
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http://www.filedropper.com/thunder There does not appear to be any clipping (this is at 2.24 LFE) but I am still hearing that crackling noise when including any significant amount of LFE in the downmix. Can anyone confirm that they hear it in these files? I suppose there's always the possibility that it's my audio setup. I'm also hearing it when I set the LAV mix to: Center: 0.0000Which makes me think that either something in my audio setup is causing that crackling with LFE, or it's part of the encoded audio. Last edited by 6233638; 28th October 2012 at 08:25. |
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decoders, directshow, filters, splitter |
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