LAV Filters - DirectShow Media Splitter and Decoders - Page 1196

bacondither · 29th May 2020, 23:25

Dav1d 0.7 is out, with some speedups for 8-bit decoding.

KoD · 30th May 2020, 09:57

amichaelt, nevcariel, thank you both!

Liisachan · 30th May 2020, 21:58

Hi, I happened to notice something minor. The language code ain (for Ainu; a minority language in Japan) is defined in ISO 639-2 and supported by MKVToolNix (you can create an MKV with an "ain" track), but it seems that LAV Filters don't recognize this language code...

ryrynz · 1st June 2020, 11:52

Quote:

Originally Posted by bacondither

Dav1d 0.7 is out, with some speedups for 8-bit decoding.

Tested some huge gains in speed with 10-bit as well. Beautiful work.

Damien147 · 1st June 2020, 14:01

I have this happening to me for months.It always happens with MPC-HC,I use D3D11 native.
I have tried various AMD drivers with DDU or factory reset installation but it still happens.I also tried with no CPU OC (i5 760) just in case to make sure it's not me,haven't touched anything else.Any ideas?
win 10 1909
MPC-HC 1.9.3
GPU RX 470(20.5.1 driver)

edit:Just discovered that it happens with software decoding too.I am confused now.

VBB · 1st June 2020, 22:29

I have a question about something that's been bugging me forever: Is it normal for the lossless sound formats to drop the bit-stream when paused for longer than a few seconds? If so, is there a workaround? Sorry if this is not LAV related.

Snowknight26 · 2nd June 2020, 00:18

Quote:

Originally Posted by VBB

I have a question about something that's been bugging me forever: Is it normal for the lossless sound formats to drop the bit-stream when paused for longer than a few seconds? If so, is there a workaround? Sorry if this is not LAV related.

Regression since 0.72.0. Best thing I've found you can do is wait a few seconds, resume. If it doesn't work, pause, wait a few seconds, resume, etc. until it works again.

VBB · 2nd June 2020, 00:20

OK, so it's not just me. I've been doing the same, but figured there has to be a better way. Thanks for the reply!

nevcairiel · 2nd June 2020, 00:23

Quote:

Originally Posted by Snowknight26

Regression since 0.72.0. Best thing I've found you can do is wait a few seconds, resume. If it doesn't work, pause, wait a few seconds, resume, etc. until it works again.

Its the audio renderers job to preserve the stream during pause. In fact a decoder hardly even notices when something is paused. It'll just send data as long as a renderer accept it, and then wait until the renderer wants more data.

VBB · 2nd June 2020, 00:26

Do you have any recommendation, Nev? I've been using MPC-HC with the built-in renderer, set to exclusive. Not sure what to do here.

nevcairiel · 2nd June 2020, 07:52

I don't know of any that really implement pausing with bitstreaming properly.

Aleksoid1978 · 2nd June 2020, 08:21

MPC-BE's WASAPI Audio Renderer implement pausing with bitstreaming, what's a problem ?

chros · 2nd June 2020, 10:16

Quote:

Originally Posted by Aleksoid1978

MPC-BE's WASAPI Audio Renderer implement pausing with bitstreaming, what's a problem ?

Yes, cheers, I asked for it and You were kind enough to implement it

Quote:

Originally Posted by nevcairiel

I don't know of any that really implement pausing with bitstreaming properly.

Quote:

Originally Posted by VBB

Do you have any recommendation, Nev? I've been using MPC-HC with the built-in renderer, set to exclusive. Not sure what to do here.

MPC-HC's own audio renderer (Sanear) does this as well (but had some bugs with it, I'm not sure that's still the case), maybe that's the issue.

Quote:

Originally Posted by Snowknight26

Regression since 0.72.0. Best thing I've found you can do is wait a few seconds, resume. If it doesn't work, pause, wait a few seconds, resume, etc. until it works again.

@VBB, try it with older Lav filters, maybe ...

nevcairiel · 2nd June 2020, 10:50

Quote:

Originally Posted by chros

MPC-HC's own audio renderer (Sanear) does this as well (but had some bugs with it, I'm not sure that's still the case), maybe that's the issue.

Thats not what I'm talking about. I don't care if other audio is muted or not during pause. In fact thats the opposite of proper bitstreaming.

But theoretically during pause the audio renderer is supposed to keep sending bitstream data to the receiver so it doesn't drop the stream, its called a "pause burst", so you can flawlessly resume right away. I'm not aware of any renderer that performs this task, they all seem to only pass data through, and not sending anything during pause, leaving users to blame the decoder if weird stuff happens during pause.

The "regression" mentioned is just another symptom of that, and only for TrueHD, because I implemented proper compliant TrueHD bitstreaming (before that, high-bitrate TrueHD+Atmos would constantly glitch), but due to the way that works, the lack of a proper pause causes even more of a glitch then other methods (because TrueHD actually has a concept of key frames, and if you lack one of those you get a bigger audio gap). And it only affects certain kinds of AVRs, which I like to call "bad ones" (and it can also be triggered by bad TrueHD authoring, or more often bad remuxing into MKV)

Its not something that can ever be fixed in LAV, since LAV just packs the audio into the proper package for bitstreaming. The actual hardware interaction is in the audio renderer.

Aleksoid1978 · 2nd June 2020, 11:36

Good way for audio renderer - on pause or when mute - send "silence"(WASAPI have flag for send silence data) to the audio device. Send "real" bitstream with silence - i think it's not possible

nevcairiel · 2nd June 2020, 13:17

"Pause bursts" are not silence as such, they are special control signals that tell the receiver to wait and hold.

Aleksoid1978 · 2nd June 2020, 13:30

Quote:

Originally Posted by nevcairiel

"Pause bursts" are not silence as such, they are special control signals that tell the receiver to wait and hold.

It there any documentation about it ?

VBB · 2nd June 2020, 19:00

Thanks for all the detail, guys. What I still don't understand is, why does this only happen with the lossless formats, and not with the lossy ones?

pacuro · 5th June 2020, 07:39

@nevcairiel could you please release new nightly Lav with dav1d 0.7.0 ? These improvements in speed are the missing few % in my setup to play av1 4k60 smoothly. Thanks in advance!

pankov · 6th June 2020, 11:56

Quote:

Originally Posted by Aleksoid1978

MPC-BE's WASAPI Audio Renderer implement pausing with bitstreaming, what's a problem ?

Alex,
is this renderer available as a standalone filter for 32-bit apps?

1st June 2020, 14:01	#23905 \| Link
Damien147 Registered User Join Date: Mar 2011 Posts: 380	I have this happening to me for months.It always happens with MPC-HC,I use D3D11 native. I have tried various AMD drivers with DDU or factory reset installation but it still happens.I also tried with no CPU OC (i5 760) just in case to make sure it's not me,haven't touched anything else.Any ideas? win 10 1909 MPC-HC 1.9.3 GPU RX 470(20.5.1 driver) edit:Just discovered that it happens with software decoding too.I am confused now. Last edited by Damien147; 1st June 2020 at 18:29.

1st June 2020, 22:29	#23906 \| Link
VBB Registered User Join Date: May 2016 Location: Long Beach, CA, USA Posts: 620	I have a question about something that's been bugging me forever: Is it normal for the lossless sound formats to drop the bit-stream when paused for longer than a few seconds? If so, is there a workaround? Sorry if this is not LAV related. __________________ Henry \| LG OLED65C7P \| Denon AVR-X3500H \| ELAC Uni-Fi x7 \| ELAC Debut 2.0 SUB3030 x2 \| NVIDIA SHIELD TV Pro 2019 \| Plex

2nd June 2020, 00:20	#23908 \| Link
VBB Registered User Join Date: May 2016 Location: Long Beach, CA, USA Posts: 620	OK, so it's not just me. I've been doing the same, but figured there has to be a better way. Thanks for the reply! __________________ Henry \| LG OLED65C7P \| Denon AVR-X3500H \| ELAC Uni-Fi x7 \| ELAC Debut 2.0 SUB3030 x2 \| NVIDIA SHIELD TV Pro 2019 \| Plex

2nd June 2020, 00:26	#23910 \| Link
VBB Registered User Join Date: May 2016 Location: Long Beach, CA, USA Posts: 620	Do you have any recommendation, Nev? I've been using MPC-HC with the built-in renderer, set to exclusive. Not sure what to do here. __________________ Henry \| LG OLED65C7P \| Denon AVR-X3500H \| ELAC Uni-Fi x7 \| ELAC Debut 2.0 SUB3030 x2 \| NVIDIA SHIELD TV Pro 2019 \| Plex

2nd June 2020, 07:52	#23911 \| Link
nevcairiel Registered Developer Join Date: Mar 2010 Location: Hamburg/Germany Posts: 10,346	I don't know of any that really implement pausing with bitstreaming properly. __________________ LAV Filters - open source ffmpeg based media splitter and decoders

29th May 2020, 23:25	#23901 \| Link
bacondither Registered User Join Date: Oct 2013 Location: Sweden Posts: 128	Dav1d 0.7 is out, with some speedups for 8-bit decoding.

30th May 2020, 09:57	#23902 \| Link
KoD Registered User Join Date: Mar 2006 Posts: 567	amichaelt, nevcariel, thank you both!

30th May 2020, 21:58	#23903 \| Link
Liisachan 李姗倩 Lǐ Shān Qiàn Join Date: Nov 2002 Posts: 1,340	Hi, I happened to notice something minor. The language code ain (for Ainu; a minority language in Japan) is defined in ISO 639-2 and supported by MKVToolNix (you can create an MKV with an "ain" track), but it seems that LAV Filters don't recognize this language code...

2nd June 2020, 08:21	#23912 \| Link
Aleksoid1978 Registered User Join Date: Apr 2008 Location: Russia, Vladivostok Posts: 2,786	MPC-BE's WASAPI Audio Renderer implement pausing with bitstreaming, what's a problem ? __________________ AMD Ryzen 5 3600 /GIGABYTE B450 Gaming X /Patriot 32Gb@3200 /Kingston 500Gb M.2 /RTX 4060 /Samsung U28R550UQI /OLED Philips 55OLED707 /Yamaha RX-V471 + NS-555 + NS-C444 + NS-333 + YST-SW215

2nd June 2020, 11:36	#23915 \| Link
Aleksoid1978 Registered User Join Date: Apr 2008 Location: Russia, Vladivostok Posts: 2,786	Good way for audio renderer - on pause or when mute - send "silence"(WASAPI have flag for send silence data) to the audio device. Send "real" bitstream with silence - i think it's not possible __________________ AMD Ryzen 5 3600 /GIGABYTE B450 Gaming X /Patriot 32Gb@3200 /Kingston 500Gb M.2 /RTX 4060 /Samsung U28R550UQI /OLED Philips 55OLED707 /Yamaha RX-V471 + NS-555 + NS-C444 + NS-333 + YST-SW215

2nd June 2020, 13:17	#23916 \| Link
nevcairiel Registered Developer Join Date: Mar 2010 Location: Hamburg/Germany Posts: 10,346	"Pause bursts" are not silence as such, they are special control signals that tell the receiver to wait and hold. __________________ LAV Filters - open source ffmpeg based media splitter and decoders

2nd June 2020, 19:00	#23918 \| Link
VBB Registered User Join Date: May 2016 Location: Long Beach, CA, USA Posts: 620	Thanks for all the detail, guys. What I still don't understand is, why does this only happen with the lossless formats, and not with the lossy ones? __________________ Henry \| LG OLED65C7P \| Denon AVR-X3500H \| ELAC Uni-Fi x7 \| ELAC Debut 2.0 SUB3030 x2 \| NVIDIA SHIELD TV Pro 2019 \| Plex

5th June 2020, 07:39	#23919 \| Link
pacuro Registered User Join Date: Sep 2015 Location: Opole, Poland Posts: 20	@nevcairiel could you please release new nightly Lav with dav1d 0.7.0 ? These improvements in speed are the missing few % in my setup to play av1 4k60 smoothly. Thanks in advance! __________________ LIT BRO: i5-9500, Z370, RTX2060 BIG BRO: i5-10500, H570, GTX1660S HTPC: i7-11700K, Z570, Topping D10s • MPC-HC + LAV, foobar2000

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