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Old 9th December 2017, 15:04   #22341  |  Link
JEEB
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Quote:
Originally Posted by Klaus1189 View Post
I use LAV Filters for watching MXF-Files, but in MXF files the audiochannels are stored as single mono streams. My NLE detects the files correctly as stereo.
How do I configure LAV Filters to use left and right mono streams as one stereo stream?
As long as the MXF file format contains no hints about its contents, I do not think it's a good idea to start implicitly poking around this unless we're having the user specifically mix it in some way. If you know of MXF providing this metadata, feel free to tell about it to ffmpeg-devel, but so far it has either been in a separate XML file (if even that!), or completely vendor-specific (we had some stuff from Vendor X that did it like this, and some stuff from Vendor Y that did it like this).

I have dealt with MXF files where you had 8 audio tracks and first two of them were used for stereo, as well as MXF files where the track had 8 channels (or 6) of audio, of which only first two were actually to be actively utilized for mixing.
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Old 9th December 2017, 19:15   #22342  |  Link
aufkrawall
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nev, is there something special about VP9 decoding on certain CPUs?
Decoding YT 4k 60fps VP9 video on a Haswell CPU shows very high CPU usage, while it is much lower with mpv.
Oddly, there is also such a difference between browsers. Like with mpv, CPU usage in Firefox is quite low, while it is much higher in Chrome and Edge.
This is only the case here with Haswell (4770k), with Skylake (6700k) the differences are much smaller.
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Old 9th December 2017, 22:33   #22343  |  Link
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How does LAV Audio manage to send a Dolby or DTS signal when the audio renderer isn't set to allow bitstreaming?

I recently set up a new pre-processor and was disappointed with how long it took to lock onto a Dolby or DTS signal (seeking would result in a silence of three to four seconds) but did not realize until today that "allow bitstreaming" was unchecked in my audio renderer's (MPC-HC Internal Audio Renderer) settings. Doing so allowed my pre-processor to lock onto the bitstream almost instantly and there is no more silence when I seek to different positions, but I am still curious why I didn't just get silence when that option was unchecked.
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Old 10th December 2017, 16:36   #22344  |  Link
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Quote:
Originally Posted by aufkrawall View Post
Decoding YT 4k 60fps VP9 video on a Haswell CPU shows very high CPU usage, while it is much lower with mpv.
Oddly, there is also such a difference between browsers. Like with mpv, CPU usage in Firefox is quite low, while it is much higher in Chrome and Edge.
Do you have a discrete graphics card in that Haswell system?
Someone told me Firefox now used hybrid VP9 decoding on their system (Sandy Bridge + Radeon 290), maybe mpv is doing the same?
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Old 13th December 2017, 19:56   #22345  |  Link
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Quote:
Originally Posted by Megalith View Post
How does LAV Audio manage to send a Dolby or DTS signal when the audio renderer isn't set to allow bitstreaming?

but I am still curious why I didn't just get silence when that option was unchecked.
If bitstreaming is unchecked, LAV decodes the Dolby or DTS stream to an uncompressed n-channel wav like stream. It can do this because ffmpeg supports decoding such streams to uncompressed n-channel wav-like stream.
No magic involved, just plain decoding !
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Old 15th December 2017, 14:47   #22346  |  Link
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Intel specific DXVA mode for VP9:
https://forum.doom9.org/showthread.php?p=1827194

Might be worthwhile to add?
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Old 15th December 2017, 14:59   #22347  |  Link
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If it has a specific mode, that usually means it also doesn't work like the normal mode.
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Old 15th December 2017, 18:36   #22348  |  Link
aufkrawall
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Quote:
Originally Posted by el Filou View Post
Do you have a discrete graphics card in that Haswell system?
Someone told me Firefox now used hybrid VP9 decoding on their system (Sandy Bridge + Radeon 290), maybe mpv is doing the same?
No discrete card. I think it's also entirely impossible that either a Sandy Bridge IGP or the R9 290 can do any VP9 decoding, Sandy Bridge IGP is garbage and so is the video decoder on Hawaii GPU.
hwdec=no in mpv also doesn't allow any doubts.
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Old 15th December 2017, 22:55   #22349  |  Link
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Note that I specified hybrid decoding, I know Hawaii's fixed-function decoder can't do VP9.
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Old 17th December 2017, 12:56   #22350  |  Link
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remove

Last edited by mclingo; 17th December 2017 at 15:24.
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Old 17th December 2017, 13:35   #22351  |  Link
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You are once again the wrong thread. Also, you should really learn some patience.
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Old 17th December 2017, 16:36   #22352  |  Link
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I'd like to get some help updating the LAV filters in MPC-hc (latest stable build) to the latest nightly build LAV filter. I install the nightly build just fine, but when I play a movie in MPC-hc it still shows 70.2.1 version in the system tray for splitter, audio and video filters. Any help please?

Side question: should my output range for my limited RGB TV set to TV output in Lav Video Settings if I use madVR and have it set to TV range in there already?

Last edited by senseipiledrive2; 17th December 2017 at 16:43.
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Old 17th December 2017, 16:38   #22353  |  Link
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It's probably using the built-in LAV filters. Easiest is to simply delete the LAV Filters sub-folder from the MPC-HC folder. As a bonus you can go to the "External Filters" options and add all LAV Filters (Video, Audio, Splitter (Source)) and set them to preferred.

Last edited by sneaker_ger; 17th December 2017 at 23:54.
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Old 17th December 2017, 18:15   #22354  |  Link
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@nev:
MKVToolNix 19.0.0:
Quote:
* mkvmerge, GUI's multiplexer: MIME types: added the `font` top-level media types from RFC 8081. This means that the following new MIME types for fonts can be used: `font/ttf`, `font/otf`, `font/woff` and `font/woff2`.
Relevant for splitter?
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Old 17th December 2017, 23:39   #22355  |  Link
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Quote:
Originally Posted by senseipiledrive2 View Post
Side question: should my output range for my limited RGB TV set to TV output in Lav Video Settings if I use madVR and have it set to TV range in there already?
That setting is only for when LAV converts to RGB, which should never happen if you use madVR. All output formats and settings should be left at default in LAV. It will automatically use the appropriate ones.
Only touch the output range settings of the driver and madvr:
http://forum.doom9.org/showthread.php?p=1271416
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Old 21st December 2017, 13:44   #22356  |  Link
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are there any problems with "lav direct 3D 11 +yadif" + nVIDIA +madVR yet?
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Old 22nd December 2017, 00:00   #22357  |  Link
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are there any problems with "lav direct 3D 11 +yadif" + nVIDIA +madVR yet?
Besides the fact that it doesn't work?
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Old 22nd December 2017, 03:20   #22358  |  Link
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should work perfectly fine in copyback mode.
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Old 22nd December 2017, 11:05   #22359  |  Link
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Works on my system apart from dropping one frame every 1-2 seconds, but that's because my CPU can't handle YADIF.
What problems are you experiencing?
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Old 28th December 2017, 03:24   #22360  |  Link
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Here is a 40 sec sample from a UHD BD with Atmos Track (325MB) where at the 33sec mark the ATMOS track drops out when bitstreaming to an AVR. There is no issue when playing the original Disc using a HW Player (and others have reported that it also plays fine on a PC using PDVD). The issue is constant across several users all with different setups but one commonality is that it just seems to be SW players like JRiver and MPC-HC that has the issue.

Thanks for looking.
Nathan

Edit PS - you can not demux the sample with eac3to but with the full M2TS it reports no issues.

Last edited by jmone; 28th December 2017 at 03:55.
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