LAV Filters - DirectShow Media Splitter and Decoders

[madshi]

Hmmmm... So you get it working with madVR with a 1080p resolution? The problem with the black screen only occurs with 2160p? Which refresh rate are you using? At 60Hz some GPUs and/or displays are limited to YCbCr 4:2:0, but at 24Hz RGB 4:4:4 should be possible.

[nussman]

2160p RGB (4:4:4) @60hz (50hz?) @10bit is limited by hmdi bandwidth isn't it?

[blaubart]

2160p RGB (4:4:4) @60hz (50hz?) @10bit is limited by hmdi bandwidth isn't it?

yes I heared sth. like HDMI 2.0a and b, only new a is 4:4:4?
My 'old' GTX960 has just HDMI 2.0 nothing known abot a/b?


Hmmmm... So you get it working with madVR with a 1080p resolution? The problem with the black screen only occurs with 2160p? Which refresh rate are you using? At 60Hz some GPUs and/or displays are limited to YCbCr 4:2:0, but at 24Hz RGB 4:4:4 should be possible.

Yes, I even forgot this - just switched from 50Hz to 30Hz and now Nvidia sais 2160p 'RGB full' and 8 bpc. But with LAV at Native madVR fullscreen still black. The sound is playing and normal OSD on a black screen.

But for 10-bit FSE were needed and Copy-back needs the half demo to switch FSE. I'm not dreaming to get 10-bit 2160p out of my GTX960. I not even have a 10-bit TV (not sure) this here is all mentioned for the future..

[DragonQ]

I'm using WebMediaPortal to watch TV outside of my home and it has an option to generate an m3u file to play transcoded streams in external players. I have tried playing it in MPC-HC using LAV Filters but almost every time I end up with no video, although the audio works fine. LAV Filters doesn't even recognise there is a video track. The weird thing is that sometimes it works fine, and playing the RTSP stream directly (no transcoding) works fine every time.

Debugging this is proving difficult. Is there a way to look at debug logs or something from LAV Filters to see if it's encountering an issue with the stream, or whether the issue is purely server-side?

[madshi]

Yes, I even forgot this - just switched from 50Hz to 30Hz and now Nvidia sais 2160p 'RGB full' and 8 bpc. But with LAV at Native madVR fullscreen still black. The sound is playing and normal OSD on a black screen.

But for 10-bit FSE were needed and Copy-back needs the half demo to switch FSE. I'm not dreaming to get 10-bit 2160p out of my GTX960. I not even have a 10-bit TV (not sure) this here is all mentioned for the future..
Strange thing. If only I could reproduce any of that on my PC. I'm getting a 4K display soon, maybe that will help. But nobody else is reporting this issue atm, so I have my doubts I'll be able to reproduce it with the 4K display, either. Just to be safe: So you get a black screen even if use 1080p display resolution, correct?

[blaubart]

Just to be safe: So you get a black screen even if use 1080p display resolution, correct?

No. Remember #20947 ?
>>> When the GTX960 was at 1080p madVR had no probs switching fullscreen with LAV 'Native'. So its just the screen resolution 2160p causing a black fullscreen<<<
Later I tried 2160p @ 30Hz 'RGB full' - still black fullscreen.

Just found out - naturally a GTX960 supports 2160p 50/60Hz RGB full 4:4:4 over HDMI 2.0 ! It was my LG Display just accepting YCbCr420 at 2160p 50/60Hz.


Strange thing. If only I could reproduce any of that on my PC. I'm getting a 4K display soon, maybe that will help.

Good to hear! 4k will knock you down, that's for sure! Windows complete super tiny, will need 150%..


But nobody else is reporting this issue atm, so I have my doubts I'll be able to reproduce it with the 4K display, either.

hmmm, at least one else came from the LAV chief himself:
http://www.dvbviewer.tv/forum/topic/55897-quo-vadis-htpc-richtung-hevc/page-4#entry432470

At this time madVR performed also windowed black. Today only 4k fullscreen remaining. Of course it may depend on numerous factors. But I'm quite confident '4k in madshis house' will soon change everything.
At <30Hz 2160p madVR performs ok (except the LAV Native fullscreen). But at 50/60hz Copy-back FSE becomes critical. And please regard also DVBViewer, he is very unstable on 4k-channels.

We could furthermore talk about this e.g in madVR topic on German DVBViewer forum (there I'm craig_s, remember? ;)) or whatever Forum you like. But please not in horrible doom9-madVR thread..:scared:

Thank you nevcairiel for your patience! :)

[madshi]

Last post on this topic in this thread: That nevcairiel post in the dvbviewer forum was from August 2015. At that time madVR did not support receiving 10bit native DXVA surfaces from the decoder yet, which is why there was a black screen. Support for 10bit native DXVA was added in madVR v0.90.0 in January 2016. So the black screen problem you have now must have a different cause. I'll follow up in the dvbviewer thread once I have that 4K screen.

[blaubart]

Just switched from Win10 to Win7, same issue. *here (http://www.dvbviewer.tv/forum/topic/37505-madvr-renderer-in-dvbviewer-nutzen/?p=449338)

[chros]

Just found out - naturally a GTX960 supports 2160p 50/60Hz RGB full 4:4:4 over HDMI 2.0 ! It was my LG Display just accepting YCbCr420 at 2160p 50/60Hz.

I'm getting a 4K display soon
Can I ask which one? Monitor or TV?
Choosing the right hardware chain (!) will be more crucial then ever was. Maybe we should create a whole new thread (e.g. called "Which hardware chain for lav+madvr playback?") for this purpose with a checklist in the first post.

[mandarynek82]

So which settings in LAV and MadVR will be the best for GTX 580? Btw still I can enable hardware acceleration only in dxva copy-back mode.

http://s6d2.turboimg.net/t/28548436_Snap1.jpg (http://www.turboimagehost.com/p/28548436/Snap1.jpg.html) http://s6d2.turboimg.net/t/28548437_Snap2.jpg (http://www.turboimagehost.com/p/28548437/Snap2.jpg.html)

[ryrynz]

So which settings in LAV and MadVR will be the best for GTX 580? Btw still I can enable hardware acceleration only in dxva copy-back mode.


Your settings are fine. MadVR is a whole different kettle of fish and should not be discussed here. There are plenty of guides online to assist you with making decisions with that.

[mandarynek82]

Your settings are fine. MadVR is a whole different kettle of fish and should not be discussed here. There are plenty of guides online to assist you with making decisions with that.

OK but how I can enable hardware acceleration? I'ts working only in copy-back mode.

[strumf666]

Copy-back is the preferred mode for most, unless some special circumstances apply.

[alexacolor]

There is an old problem with the non-occurrence of sound in the rtmp stream.
Also in such streams synchronization problem.
Here is an example of the flow:
rtmp://tv-penza.ru/live/1

Flash and VLC playing this stream with sound.

[LigH]

It's pretty hard to find reliable reports about the minimum hardware requirements to decode HEVC 1080p (as used in DVB-T2 HD in Germany) without GPU acceleration. Most discussions I found so far immediately switch the topic to "better get some CPU with GPU incl. hardware decoding support". That may mean exchanging the complete PC for some... and the question was rather if existing hardware is still good enough.

So - which CPU class would you consider a minimum for decoding 1080p HEVC with LAV Filters?

In my experience, an AMD Phenom-II X4 is just not fast enough, most probably due to the lack of instruction sets much better than SSE2. I guess an FX era QuadCore may be able... And regarding intel, a Core i# Quad should be a rather safe bet; I read a Core2 Duo is not.

P.S.: Another fresh report about an E7500 DualCore being close to the threshold.

[sneaker_ger]

In my experience, an AMD Phenom-II X4 is just not fast enough, most probably due to the lack of instruction sets much better than SSE2. I guess an FX era QuadCore may be able... And regarding intel, a Core i# Quad should be a rather safe bet; I read a Core2 Duo is not.
Read some reports about mobile Intel Core i5 dual core being more than sufficient. My Core i7-860 (1st gen i7, 2009) does some 500 fps on German DVB-T2 with LAV 64. Unfortunately the popular DVB Viewer is 32 bit only. Lentoid decoder is much faster on 32 bit and older hardware in general, it seems. But it may have some bugs. It's worth a try, at least.

[Nevilne]

1) on your current pc, decode a vid to -null in ffmpeg and note the speed
2) check your cpu score on cpubenchmark.net
3) do some simple math
4) see which minimal cpu score you require

[huhn]

than you have an idea for one file...

it is heavily based on the used bit rate.

and than you can't ignore CPU instractions

[sneaker_ger]

Is ffmpeg now as fast as LAV in hevc decoding? Nevcairiel cherry-picked optimizations from OpenHEVC, originally.

[Nintendo Maniac 64]

Hey, is there any way to specify LAVfilters to not decode 1080p 60fps? I have an Nvidia NVS 3100m that can decode 720p 60fps and 1080p 30fps, but 1080p 60fps makes it choke. The CPU is plenty fast (i5 540m) to decode 1080p 60fps in software though, but I only want to use software decoding when necessary and not for everything.

tl;dr version:

720p 60fps = OK
1080p 30fps = OK
1080p 60fps = fail

Currently, AFAIK, LAVfilters only has options for specifying resolution (like 720p and 1080p), but not the framerate, which is no good when 1080p 30fps is perfectly fine but 1080p 60fps is not.

For reference the iGPU on my AMD E-350 also has this exact same performance issue (though the CPU portion is much slower and definitely can't do 1080p 60fps in software).


Oh and to clarify, this is all with 8bit AVC @ high profile.

----------------------------------------------------------------

It's pretty hard to find reliable reports about the minimum hardware requirements to decode HEVC 1080p

In my experience, an AMD Phenom-II X4 is just not fast enough

I'm assuming you're talking about codecs newer than AVC, right? Because I could decode 1080p 30fps AVC in software on a lowly Athlon 64 x2 4800+ (2.5GHz)...

As for newer codecs, I've been able to do YouTube-encoded VP9 at 1440p 30fps and 1080p 60fps on a 2.4 GHz Penryn Core 2 Duo, but a key point is to use "D3D Fullscreen" in MPC-HC because otherwise the el-lame-o Intel 965GMA just frame-skips like no tomorrow. No idea about HEVC though...

[LigH]

Yes, I explicitly named HEVC = H.265, because it is used in DVB-T2 HD.

[Nintendo Maniac 64]

Yes, I explicitly named HEVC = H.265, because it is used in DVB-T2 HD.

Well if you could provide a specific video to use for testing, I could test it on a few older CPUs including a...

1.2GHz Pentium M
1.5GHz Celeron (Pentium M-based)
1.6GHz Intel Atom (1st generation single core + SMT)
2GHz Core 2 Duo (Merom)
2.4GHz Core 2 Duo (Penryn)
2.4GHz i5 520m (Westmere)

(turns out the previously-mentioned i5 540m was actually faulty believe it or not - swapped it out and now everything works including 1080p 60fps without any random BSoD-ing)

If I include CPUs and PCs that don't currently have an OS, I also have a...

1.73GHz Athlon XP (Thoroughbred)
2GHz Pentium 4 (Northwood)
2.7GHz Celeron (Northwood)
1.6GHz Core Duo (Yonah, not Core 2 Duo)
1.73GHz Celeron (Merom)
1.9GHz Athlon 64 x2 (Brisbane G1)
2.5 GHz Athlon 64 x2 (Brisbane G2)
3GHz Athlon 64 x2 (Windsor)

[LigH]

I believe sneaker_ger may be able. There may be material up to 1080p@50/60fps, probably with limited complexity.

I asked on behalf of people in the DVBViewer and German doom9/Gleitz boards, but I don't have reception without roof antenna, too far away from supported towns.

[Nerva]

Is there a reason to use "Expand 6.1 to 7.1" vs. "Enable Mixing" with the Output Speaker Configuration being either 5.1 or 7.1? I have a PC with 5.1 and a HTPC with 7.1. I'm just thinking, if I'm already using the mixer and I'm playing a 6.1 file, wouldn't the mixer serve the same function as the "Expand 6.1 to 7.1" option.

Could someone answer this? Thanks.

[DragonQ]

Yes, I explicitly named HEVC = H.265, because it is used in DVB-T2 HD.
Where? In the UK DVB-T2 HD is AVC.

[nevcairiel]

There is dedicated threads on this forum about performance talks, please direct such discussions there! Thanks!

[robl45]

quick question. I've used MPC-HC for a long time now with lav filters, I set up external filters in MPC-HC as that is what i prefer and it works fine. I wanted to try out MPC-BE and I did the same thing adding the external filters and turning off all internal filters yet it is using Lav splitter and Lav video but won't use lav audio. Is there a special way to setup mpc-be?

[VictorLS]

nevcairiel
Prog add MainConcept HEVC Video Decoder support in its Demultiplexor
http://i.cubeupload.com/HDmGWT.png
Is it difficult to add it in LAV Splitter?

[VictorLS]

robl45
In MPC-BE 1.4.4 (build 286) under XP I unchecked all in Audio Tab Internal Filters and add LAV Audio set point to Prefer:
http://i.cubeupload.com/c16Bzn.png
What do you like MPC-BE for?

[LigH]

@ VictorLS:

You want LAV Splitter to "support" MainConcept HEVC Decoder ...

a) LAV Video Decoder can decode HEVC too, what else can MainConcept what LAV Video Decoder cannot?
b) Does MainConcept need a specific support at all, e.g. a special authentication, to be used in DirectShow filter chains? If not, I guess you could just disable HEVC support in LAV Video Decoder, and DirectShow shall connect to the next available filter?

[owlsroost]

Where? In the UK DVB-T2 HD is AVC.

HEVC is being used for the new DVB-T2 service in Germany - only test transmissions at present, but the full service is due to start in May 2017 (AFAIK).

From the test recordings I've played with, it's mostly 1920 x 1080p @ 50fps, around 2 - 2.5 Mbps e.g. -

Video
ID : 48 (0x30)
Menu ID : 137 (0x89)
Format : HEVC
Format/Info : High Efficiency Video Coding
Format profile : Main@L4.1
Codec ID : 36
Duration : 1mn 2s
Bit rate : 2 182 Kbps
Width : 1 920 pixels
Height : 1 080 pixels
Display aspect ratio : 16:9
Frame rate : 50.000 fps
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Bits/(Pixel*Frame) : 0.021

[robl45]

robl45
In MPC-BE 1.4.4 (build 286) under XP I unchecked all in Audio Tab Internal Filters and add LAV Audio set point to Prefer:
http://i.cubeupload.com/c16Bzn.png
What do you like MPC-BE for?

BE does stereo scopic subtitles and they work using madvr for rendering MVC 3d.

[VictorLS]

LigH
I have not strong enough computer to decode h265 3840x2160p60 10bit smoothly (h265 1920x1080p50 I can watch absolutely smoothly using CyberLink Video Decoder (PDVD Generic) with 20% load of each three cores of my CPU and using LAV Video Decoder with 50% CPU load). So I wanted to see slideshow h265 3840x2160p60 10bit directly from SATs but LAV Video Decoder can not decode I-frames only - I strongly asked nevcairiel add this feature in LAV Video Decoder two times earlier but (((
Also I asked Cyberlink - they are not answered me at all. Elecard HEVC Video Decoder decodes recorded on HDD h265 3840x2160p60 10bit perfectly but directly from SAT - decodes well 8bit only.
MainConcept HEVC Video Decoder can decode I-frames only with SkipPB settings in DVBViewer many times ago and in ProgDVB from yesterday, because I think MainConcept HEVC Video Decoder has non-standart pin which can connect to MainConcept's MPEG and MP4 Demultiplexer, but can not to LAV Splitter, so I can not use MainConcept HEVC Video Decoder with i.e. mkv files before nevcairiel add support of MainConcept HEVC Video Decoder in LAV Splitter.
PS. I don't want to keep many demultiplexers and decoders in my WinXP and Win7x64 )

[3421]

I removed the message.

[GTPVHD]

https://developer.nvidia.com/nvidia-video-codec-sdk

http://on-demand.gputechconf.com/gtc/2016/presentation/s6226-abhijit-patait-high-performance-video.pdf

http://i.imgur.com/KXdG6YH.png

Maybe nev can retire CUVID decoding since Nvidia doesn't support it much anymore and it doesn't work on Win10 anyway, prefering a unified SDK approach with Nvidia Video Codec SDK 7.0.

[wawa79]

Hello,
Until today, I have been prefering FFDShow audio to LAV audio in my Mediaportal CODEC settings.
The reason is that I never managed to get LAV audio to output Dolby TrueHD 5.1/7.1 as multichannel AC3 to my SPDIF output (my 5.1 AVP has no HDMI / HD audio): I tried the last 0.68.1 version, I tried to enable mixing and in best case, I only get 2.0 (despite GraphStudio status shows 8 channels IN and 6 channel OUT when I use LAVF :devil:)

FFDShow properly handles direct 5.1 TrueHD output and downmixes 7.1 TrueHD (using its Mixer panel) and reencodes it as AC3 to fit my SPDIF output.

My life with FFDShow was peaceful until Dolby's marketing decision to release Dolby Atmos to public. FFDShow just get stuck on these streams so I cannot use it anymore. And because Atmos is the default stream selected when starting playback, there is no way to play these streams from MP...

I found a workaround which is to setup LAVF audio as the decoder and add FFDShow as postprocessor but I am pretty sure that I am missing something to properly setup LAVF to handle properly TrueHD on my setup... or that there is definitely a bug.

Could anyone help me?

Thank you in advance!


But

[nevcairiel]

Maybe nev can retire CUVID decoding since Nvidia doesn't support it much anymore and it doesn't work on Win10 anyway, prefering a unified SDK approach with Nvidia Video Codec SDK 7.0.

They didn't change anything, its still the same thing in a new zip file.

[PeQuE]

I've searched all thread for the word "EXIF" and I only found two posts dated at 2012, which have nothing to do with what I want to ask, so here we go...

I know EXIF metadata has been used to "declare" picture orientation for many years... What I didn't know is that videos (at least .mov and .mp4 ones) had also this EXIF info. The fact is that both smartphones currently at home (IPhone 6s and Nexus 5X) uses "Rotation" EXIF tag to declare actual orientation for videos taken with them...

The question is: who in directshow filter chain is responsible to process this info and finally play correctly oriented video? splitter? video filter? player itself (if it has any sense)?

My currently set up is LAV Splitter + LAV Video inside MediaPortal 1, and it's failing at playing this videos correctly: vertical ones taken with IPhone 6s, all of them taken with right hand using Nexus 5X, because the're all tagged with rotation=180 as sensor is upside-down mounted for space matters for this smartphone.

Thanks a lot. :)

[sneaker_ger]

LAV can read and pass on such rotation info but leaves the actual work to the renderer. madVR should support rotating.

http://forum.team-mediaportal.com/threads/madvr-support-in-mp1.133972/

[PeQuE]

Wow! So it's renderer which does the job?!

I'll tesd madVR then... :)

Thanks a lot for the info.

[suanm]

Mr.nevcairiel
It's very popular with HD fans that one splitter can output and display in-built two and more language subtitles (for example:english and chinese or french) at the same time when playback.I don't find LAV splitter source or LAV splitter can do the same task as I imagine.The in-built splitter in potplayer can splits two different language subtitles at the same time when playback,though.
Could you improve LAV splitter source or LAV splitter?
Thank you in advance.

[aufkrawall]

Received a GTX 1070, 4k HEVC 10 bit 50fps works fine with DXVA2 copyback on the Sandy Bridge PCIe 2.0 platform.
(Sandy till death... or at least Zen)
Can't test anything else anymore, card is already out of the PC and will go back soon (not satisfied with the fans and performance in some games).

[paranoya7]

i cant play some avi files when i choose default splitter of lav splitter. i can play all avi files when i choose avi splitter. Here im adding 2 avi files nfo. First one cant play second one can play. What should i do and what is wrong? I hope someone help me.

I'm using mpc be and codec pack last versions.

[LigH]

Attachments take a while to be approved; what kind of "nfo" is this, a screenshot from player internal dialogs? A MediaInfo analysis in text form could have get pasted in a CODE block much easier.

How does it "not play"? Is there any error message, or does it just not start playing?

[paranoya7]

This one cant play. I click video and mpc hc window open then i have black screen just. Nothing happen. (If i choose avi splitter, everything fine)

Format : AVI
Format/Info : Audio Video Interleave
File size : 490 MiB
Duration : 1 h 36 min
Overall bit rate : 708 kb/s
Writing application : Lavf56.25.101

Video
ID : 0
Format : AVC
Format/Info : Advanced Video Codec
Format profile : Main@L3
Format settings, CABAC : Yes
Format settings, ReFrames : 3 frames
Codec ID : H264
Duration : 1 h 36 min
Bit rate : 564 kb/s
Width : 854 pixels
Height : 480 pixels
Display aspect ratio : 16:9
Frame rate mode : Variable
Frame rate : 50.000 FPS
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Progressive
Bits/(Pixel*Frame) : 0.028
Stream size : 390 MiB (80%)

This one is playing without no problem.

Format : AVI
Format/Info : Audio Video Interleave
File size : 174 MiB
Duration : 20 min
Overall bit rate mode : Variable
Overall bit rate : 1 200 kb/s
Writing application : Nandub v1.0rc2
Writing library : Nandub build 1853/release

Video
ID : 0
Format : MPEG-4 Visual
Format profile : Advanced Simple@L5
Format settings, BVOP : 2
Format settings, QPel : No
Format settings, GMC : No warppoints
Format settings, Matrix : Default (H.263)
Codec ID : XVID
Codec ID/Hint : XviD
Duration : 20 min
Bit rate : 1 054 kb/s
Width : 512 pixels
Height : 384 pixels
Display aspect ratio : 4:3
Frame rate : 25.000 FPS
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Progressive
Compression mode : Lossy
Bits/(Pixel*Frame) : 0.214
Stream size : 153 MiB (88%)
Writing library : XviD 1.0.3 (UTC 2004-12-20)

[egandt]

Received a GTX 1070, 4k HEVC 10 bit 50fps works fine with DXVA2 copyback on the Sandy Bridge PCIe 2.0 platform.
(Sandy till death... or at least Zen)
Can't test anything else anymore, card is already out of the PC and will go back soon (not satisfied with the fans and performance in some games).

I have a GTX 1070, using DXVA2 copyback I've tested 4k30p HEVC10, up to 400mbps, without issues.

http://jell.yfish.us/


ERIC

[3421]

GTX 1070 150 watt. Hot. GTX 980 165 W, GTX 580 244 W. 150 W is still a lot.

[Sunset1982]

Any news of the RX480 HEVC decoding issue? Anyone here with a RX card?

[chros]

@nevcairiel: thanks for the Weston Three Fields (simple) method, it does wonders with the caps of Olympics on my underclocked laptop!

[mixus]

I5 6600K + GTX 1060

DXVA2 Copy-Back

Success! ( HEVC Main10 4K 120 FPS )

Video is Converted with StaxRip.
Used AssumFPS and NVENC (rigaya)

http://i.hizliresim.com/MkE162.png


Video
ID : 1
Format : HEVC
Format/Info : High Efficiency Video Coding
Format profile : Main 10@L6.2@Main
Codec ID : V_MPEGH/ISO/HEVC
Duration : 55 s 383 ms
Bit rate : 202 Mb/s
Width : 3 840 pixels
Height : 2 160 pixels
Display aspect ratio : 16:9
Frame rate mode : Variable
Frame rate : 120.001 FPS
Original frame rate : 120.000 FPS
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 10 bits
Bits/(Pixel*Frame) : 0.203
Stream size : 1.30 GiB (100%)
Default : Yes
Forced : No

(Sorry for bad english, informational purposes only.)