LAV Filters - DirectShow Media Splitter and Decoders - Page 711

dukey · 19th February 2013, 12:24

Quote:

Originally Posted by nevcairiel

You can't dynamically switch between DXVA and Software, or the other way around. You need a full reconnect to do this.

I see, that makes sense I suppose. So what is required, stopping the graph, breaking the pins and reconnecting them ?

dukey · 19th February 2013, 23:26

In graph edit. I tried stopping the graph, breaking all the connections, and reconnecting the pins, but it refuses to use DXVA. The only way seems to be to remove the decoder, then render the pin (which brings back LAV) and it works.

THX-UltraII · 20th February 2013, 09:22

Someone knows what the av sync option in the audio filter does?

20th February 2013, 16:35

Yes.

Mercury_22 · 21st February 2013, 11:32

@Nev I just saw that XBMC claims to support "DTS-HD MA" now (ffmpeg AFAIK) does this mean that LAV will do too (without the DLL

) ?

nevcairiel · 21st February 2013, 11:34

The only thing they finally support is bitstreaming, years too late.

Vasilich · 21st February 2013, 11:51

nev, is that technically possible to "bitstream" AC3 core in case of EAC3 audio?
i have an old AV receiver connected to my HTPC via optical SPDIF. Receiver supports only AC3, so if i want to watch TV with AC3+ (e.g. Servus TV HD) i get only stereo, because SPDIF is capable to transfer AC3-encoded 5.1, and for EAC3 LAV decodes it completely, and SPDIF gets only stereo PCM

nevcairiel · 21st February 2013, 11:52

EAC3 has no "AC3 core", so its not possible.

madshi · 21st February 2013, 12:00

Blu-Ray E-AC3 primary audio tracks do have an AC3 core. Blu-Ray E-AC3 secondary audio tracks do not, nor do HD DVD E-AC3 primary tracks.

nevcairiel · 21st February 2013, 12:02

He inquired about broadcast TV primarily

Primary Blu-ray EAC3 tracks are in a rather special position there, and can't be compared with anything else.

Vasilich · 21st February 2013, 12:07

So for me the only chance is to disable support in LAV and use FFDShow with enabled AC3 encoder for those formats that do not pass in SPDIF bandwidht and can't be understood by my receiver.
Thanks for explanation!

madshi · 21st February 2013, 12:11

Quote:

Originally Posted by nevcairiel

He inquired about broadcast TV primarily

Oh, right. Sorry, seems I flew over the question text too fast...

Niyawa · 21st February 2013, 20:16

Hey nev, a user of my guide asked the following question: "What's the reason for AYUV being disabled in the LAV video decoder?" I'm not really sure myself so I'm asking you that directly.

I did a search before in the forum and around the net but never found any details.

JEEB · 21st February 2013, 20:42

Quote:

Originally Posted by Niyawa

Hey nev, a user of my guide asked the following question: "What's the reason for AYUV being disabled in the LAV video decoder?" I'm not really sure myself so I'm asking you that directly.

MS renderers such as EVR were meant to take in AYUV for the separate subtitle pin. At least, that was their meaning, and the YCbCr->sRGB conversion path is far from optimized for this format.

But then it was found out that the renderer(s) accept AYUV with the main pin as well, and... that leads to the fact that converting to RGB in the decoder and then rendering that is much more faster than trying to play 4:4:4 YCbCr content by saying that an AYUV connection is available. In other words, feeding AYUV to the MS renderers as the main pin's content pretty much means a slideshow. Also, EVR-CP (MPC-HC's customized EVR renderer, also their default), if I recall correctly, is not capable of switching types on the fly, so I guess it was just found out to be simpler to just block it altogether unless the user specifically wants 8bit 4:4:4 YCbCr output.

Niyawa · 21st February 2013, 21:23

Quote:

Originally Posted by JEEB

MS renderers such as EVR were meant to take in AYUV for the separate subtitle pin. At least, that was their meaning, and the YCbCr->sRGB conversion path is far from optimized for this format.

But then it was found out that the renderer(s) accept AYUV with the main pin as well, and... that leads to the fact that converting to RGB in the decoder and then rendering that is much more faster than trying to play 4:4:4 YCbCr content by saying that an AYUV connection is available. In other words, feeding AYUV to the MS renderers as the main pin's content pretty much means a slideshow. Also, EVR-CP (MPC-HC's customized EVR renderer, also their default), if I recall correctly, is not capable of switching types on the fly, so I guess it was just found out to be simpler to just block it altogether unless the user specifically wants 8bit 4:4:4 YCbCr output.

Thank you very much for the answer. I probably would never realized such thing myself.

aufkrawall · 21st February 2013, 21:51

EVR doesn't render AYUV correctly, brightness is slightly wrong.

cyberbeing · 21st February 2013, 22:11

At the moment, using xy-VSFilter with madVR would be the primary reason to enable AYUV in LAV Video.

Note: Adding YV24 support to xy-VSFilter is something on our to-do list. AYUV was just an easier first target since it was already supported internally.

nevcairiel · 21st February 2013, 23:03

As it was already explained, EVR/hardware support for AYUV is just so bad that it was better to disable it. madVR also accepts YV24, so no reason to active it for madVR alone.

dansrfe · 22nd February 2013, 20:19

What are the recommended mix levels for 5.1 audio output? Also, if the number of source channels matches the output channels then no mixing occurs correct?

I wish there was a table listing all the recommended mix levels for all output speaker configurations.

22nd February 2013, 20:21

I'm pretty sure no mixing occurs.

21st February 2013, 11:32	#14205 \| Link
Mercury_22 Registered User Join Date: Dec 2007 Posts: 1,138	@Nev I just saw that XBMC claims to support "DTS-HD MA" now (ffmpeg AFAIK) does this mean that LAV will do too (without the DLL ) ? __________________ Intel UHD Graphics 750; Win 10 22H2

21st February 2013, 11:34	#14206 \| Link
nevcairiel Registered Developer Join Date: Mar 2010 Location: Hamburg/Germany Posts: 10,348	The only thing they finally support is bitstreaming, years too late. __________________ LAV Filters - open source ffmpeg based media splitter and decoders

21st February 2013, 11:52	#14208 \| Link
nevcairiel Registered Developer Join Date: Mar 2010 Location: Hamburg/Germany Posts: 10,348	EAC3 has no "AC3 core", so its not possible. __________________ LAV Filters - open source ffmpeg based media splitter and decoders

21st February 2013, 12:02	#14210 \| Link
nevcairiel Registered Developer Join Date: Mar 2010 Location: Hamburg/Germany Posts: 10,348	He inquired about broadcast TV primarily Primary Blu-ray EAC3 tracks are in a rather special position there, and can't be compared with anything else. __________________ LAV Filters - open source ffmpeg based media splitter and decoders

21st February 2013, 20:16	#14213 \| Link
Niyawa Registered User Join Date: Dec 2012 Location: Neverland, Brazil Posts: 169	Hey nev, a user of my guide asked the following question: "What's the reason for AYUV being disabled in the LAV video decoder?" I'm not really sure myself so I'm asking you that directly. I did a search before in the forum and around the net but never found any details. __________________ madVR scaling algorithms chart - based on performance x quality \| KCP - A (cute) quality-oriented codec pack

19th February 2013, 23:26	#14202 \| Link
dukey Registered User Join Date: Dec 2005 Posts: 560	In graph edit. I tried stopping the graph, breaking all the connections, and reconnecting the pins, but it refuses to use DXVA. The only way seems to be to remove the decoder, then render the pin (which brings back LAV) and it works.

20th February 2013, 09:22	#14203 \| Link
THX-UltraII Registered User Join Date: Aug 2008 Location: the Netherlands Posts: 851	Someone knows what the av sync option in the audio filter does?

20th February 2013, 16:35	#14204 \| Link
paradoxical Guest Posts: n/a	Yes.

21st February 2013, 11:51	#14207 \| Link
Vasilich Registered User Join Date: Jun 2012 Location: Germany, Mayence Posts: 25	nev, is that technically possible to "bitstream" AC3 core in case of EAC3 audio? i have an old AV receiver connected to my HTPC via optical SPDIF. Receiver supports only AC3, so if i want to watch TV with AC3+ (e.g. Servus TV HD) i get only stereo, because SPDIF is capable to transfer AC3-encoded 5.1, and for EAC3 LAV decodes it completely, and SPDIF gets only stereo PCM

21st February 2013, 12:00	#14209 \| Link
madshi Registered Developer Join Date: Sep 2006 Posts: 9,140	Blu-Ray E-AC3 primary audio tracks do have an AC3 core. Blu-Ray E-AC3 secondary audio tracks do not, nor do HD DVD E-AC3 primary tracks.

21st February 2013, 12:07	#14211 \| Link
Vasilich Registered User Join Date: Jun 2012 Location: Germany, Mayence Posts: 25	So for me the only chance is to disable support in LAV and use FFDShow with enabled AC3 encoder for those formats that do not pass in SPDIF bandwidht and can't be understood by my receiver. Thanks for explanation!

21st February 2013, 21:51	#14216 \| Link
aufkrawall Registered User Join Date: Dec 2011 Posts: 1,812	EVR doesn't render AYUV correctly, brightness is slightly wrong.

21st February 2013, 22:11	#14217 \| Link
cyberbeing Broadband Junkie Join Date: Oct 2005 Posts: 1,859	At the moment, using xy-VSFilter with madVR would be the primary reason to enable AYUV in LAV Video. Note: Adding YV24 support to xy-VSFilter is something on our to-do list. AYUV was just an easier first target since it was already supported internally.

21st February 2013, 23:03	#14218 \| Link
nevcairiel Registered Developer Join Date: Mar 2010 Location: Hamburg/Germany Posts: 10,348	As it was already explained, EVR/hardware support for AYUV is just so bad that it was better to disable it. madVR also accepts YV24, so no reason to active it for madVR alone. __________________ LAV Filters - open source ffmpeg based media splitter and decoders

22nd February 2013, 20:19	#14219 \| Link
dansrfe Registered User Join Date: Jan 2009 Posts: 1,210	What are the recommended mix levels for 5.1 audio output? Also, if the number of source channels matches the output channels then no mixing occurs correct? I wish there was a table listing all the recommended mix levels for all output speaker configurations.

22nd February 2013, 20:21	#14220 \| Link
paradoxical Guest Posts: n/a	I'm pretty sure no mixing occurs.