LAV Filters - DirectShow Media Splitter and Decoders

[fastplayer]

Ouch, I thought it was only NV12, YUY2 and RGB32.

[hoborg]

DTS in WAV is still not working in ne version of LAV audio filter ???

Is there anything to configure or???

It is working just fine for me, but i am not using audio passthrough.

[madshi]

Thats funny, the line only appears if output is YV12, if its NV12 the line vanishes. Can someone explain that to me?
madshi? maybe a madVR bug? I don't get it in EVR. (For reference, sample here: http://videoff7.free.fr/myth-cm.flv)

I doubt its a decoder problem, as the line vanishes depending on which output format you use or renderer you use.
It's probably caused by the weird video width. It's an odd number, which is very rare. Both madVR and EVR ask the decoder to deliver a nice pitch, so the odd width should be no problem. But for whatever reason the last chroma sample seems to be missing, when LAVVD sends YV12, while it's there when sending NV12. Looking at my code, I don't think it's a madVR issue, but I'm not 100% sure. My code for YV12 and NV12 input is pretty similar and both handle the odd width identically. Can you double check your code? FWIW, the odd width is a problem because due to 4:2:0 subsampling the 427 width video has not 213, but 214 chroma samples. At least that's my understanding. My best guess is that LAVVD transfers 214 chroma samples per line when sending NV12 and 213 when sending YV12. I'm just guessing here, though. And I've no idea why the problem doesn't show with EVR. After all it could be a problem in madVR, but I don't see it in my code.

[nevcairiel]

Chroma should be rounded up? Hm, i've always wondered how that works. How does it work for odd heights? Is that even allowed?

I did indeed find the problem. It didn't appear for NV12 because that is being processed using SSE2, which always processes 16 byte at a time - while YV12 uses plain memcpys which use the exact width .. oh well.

[madshi]

Chroma should be rounded up? Hm, i've always wondered how that works. How does it work for odd heights? Is that even allowed?
Oh well. I've no idea. I wasn't sure myself whether chroma should be rounded up, but if you don't, the one odd luma pixel has no chroma value at all. Yeah, madVR also expects an extra chroma line if the height is odd.

Would really love to know if there's an "official" way to handle this. Maybe I'm wrong and chroma width/height should be rounded down, I don't really know.

[nevcairiel]

I just hope it won't cause issues down the line. I took the "safe" route and only write the extra chroma value if the renderer requests stride to fit it in, if a stupid post-processor like ffdshow sits after the decoder, it will get the old size - just to be safe. ;)
I'm confused yet again, though. NV12 has interleaved U/V samples, which means it has to be an even size, or stuff goes really weird. o.O Odd sizes really are not good for you.

I should investigate how post-processors behave when i suggest a stride to them, so the issue is not existent anymore.

Edit:
Too bad, ffdshow raw video is too stupid to understand a suggested stride from the decoder.
VSFilter manages, though. Maybe i should teach ffdshow.

On that note, do people use any video post-processors beside VSFilter/DirectVobSub or ffdshow?
--
Forget it, fixing ffdshow is impossible, i'm not touching that thing. Instead, they'll just end up with non-strided images, an extra memory copy to compensate for the unaligned memory access, and what do i know on other short comings. Seriously, did i mention that its crap? :)

[TheShadowRunner]

Thanks for looking into the matter guys, and fastplayer for further testing.
Kinda glad the green line was reproducible on someone else's setup ^^;

[SEt]

I'm pretty sure that odd width/height are illegal for YUV420 data. MSDN explicitly states that NV12 data has even number of lines and example code for converting RGB32 to YV12 uses
assert(dwWidthInPixels % 2 == 0);
assert(dwHeightInPixels % 2 == 0);
whatever it means.

[nevcairiel]

Well its encoded as mod 16 (a macro block in VP6 seems to be 16 pixels), but it then defines a cropping to cut it down to some odd width. This is not a problem when talking directly to a renderer, because they always require some stride anyway. It is only a problem when talking to ffdshow, which is too dumb to handle strides.

[CrAsH cro]

It is working just fine for me, but i am not using audio passthrough.

You can get audio from MPC-HC or MePo?
I get noise in MPC-HC even if passthrough is disabled...

[SEt]

Even with stride request it doesn't look good at all: for YV12 data chroma stride is half the luma stride. Minimal stride that can be requested is width, but is chroma's 'half' rounded up or down? Nowhere said as it's assumed to be even.

[Xaurus]

Hi nev,

I have uploaded a video I shot when suddenly LAV audio decided to drop out on me again.
Please, if you have any way for me to debug/log this I am happy to do it. I am amazed that I am the only one with this problem. :(

click for mp4 (http://home.halden.net/mordor/audio_dropout.mp4)

We were watching a normal mkv, the dropout happened first after 20 minutes then it always happened after each ~1 second when seeking (as you can see in the movie). This is exactly the same behavior that has happened 3 times already.
If I reload the file and seeking to the same spot, it plays fine. It has never happened immediately after opening a file.

LAV Filters 0.38, madvr 0.77, reclock 1.8.7.7 (wasapi), mpc-hc 1.5.3.3801. Audio is decoded in LAV audio and sent over HDMI.

[Thunderbolt8]

what library does LAV Audio use when decoding AC3? libavcodec? arcsoft libraries?

[Superb]

You should not listen to rumors. In its default mode it will just take over AVI splitting, but if you disable it, the MS AVI Splitter should take over just fine. (Note that it should be disabled in the installer, if you disable it in LAV Splitters properties after installation, it might not work properly)
Just wondering... is this because of UAC? If it is, wouldn't it be possible to make the options panel ask for elevated permissions when it needs to use those?

[Mr.White]

You can get audio from MPC-HC or MePo?
I get noise in MPC-HC even if passthrough is disabled...

It works fine for me in MPC-HC (DTS in Wav from dts cd 44.1KHz).
When not Bitsreaming, LavSplitter -> LavAudio -> Default DirectSound Device = Multicchannel PCM
When Bitsreaming, LavSplitter -> Reclock (wasapi) = DTS
If i use LavAudio when Bitstreaming, MPC-HC and GraphStudio crash.
It doesn’t work in MePo.

[06_taro]

Patched builds (x86 and x64, with roytam1's rv30/40 seek on keyframes patch) :

Non-installer: LAVFilters-0.38-10-git-r1397(a13fba5).7z (http://j.mp/LAVFilters-r1397)
Installer: LAVFilters-0.38-10-git-r1397(a13fba5)-Installer.7z (http://j.mp/LAVFiltersI-r1397)

[BatKnight]

DTS in WAV is still not working in ne version of LAV audio filter ???

Is there anything to configure or???
0.38 works for me. Not using passthrough though.
Just LAV Splitter + LAV Audio. Plays all my DTS in WAV.
I tested with dtsdecoderdll.dll and with dca, both worked.

0.37 worked too.

Bat

[CrAsH cro]

It works fine for me in MPC-HC (DTS in Wav from dts cd 44.1KHz).
When not Bitsreaming, LavSplitter -> LavAudio -> Default DirectSound Device = Multicchannel PCM
When Bitsreaming, LavSplitter -> Reclock (wasapi) = DTS
If i use LavAudio when Bitstreaming, MPC-HC and GraphStudio crash.
It doesn’t work in MePo.

i don't use Reclock... So, in the end, when bitstreaming with LavSplitter and LavAudio...thing doesn't work...
I can only get it to work in GraphStudio if i disable passthrough... MPC-HC doesn't work with or without passthrough. Do you guys change some of the options in MPC-HC that comes with SAF6??? Or you do not use SAF at all???

[hoborg]

MPC-HC doesn't work with or without passthrough. Do you guys change some of the options in MPC-HC that comes with SAF6??? Or you do not use SAF at all???

You need to add LAV audio decoder to MPC-HC external filters.
MPC-HC doesnot create the same default graph like Graphstudio.

[Dogway]

Is it possible to implement delayaudio real time? So one doesn't need to restart MPC and audio sync should be easier

[zoose]

Does LAV video support any sort of debug logging?

The application that comes with my DVB-T card allows specifying alternative MPEG2/H264 video decoders. LAV Video Decoder is listed in the dropdown but when selected doesn't work for some reason.

The only other MPEG-2 decoders installed on my system ffdshow and Arcsoft both work fine.

[Pat357]

What could be the reason that Lav-vid doesn't work with raw h264 files ?
If I enable "raw video" in Lav-splitter, it's getting used to open the .h264 file (otherwise lav-splitter is not being used), but I get no video from Lav-vid.

[CruNcher]

try another solution in the chain to fallback for example arcsoft or cyberlink though their are issues as well depending on the bitstream scenario with lav video though most of this is ffmpeg related

[matthew_eli]

A simple question: will be ever supported 4K resolution by CUVID?

Thanks ;)

[JEEB]

A simple question: will be ever supported 4K resolution by CUVID?

Thanks ;)As soon as the drivers, APIs etc. start supporting it. The newest hardware might be capable of it, but they sure haven't implemented it in software yet :P

[Midzuki]

A simple question: will be ever supported 4K resolution by CUVID?

Just out of curiosity, do you already have a 90-inch monitor? :p

[nevcairiel]

What could be the reason that Lav-vid doesn't work with raw h264 files ?
If I enable "raw video" in Lav-splitter, it's getting used to open the .h264 file (otherwise lav-splitter is not being used), but I get no video from Lav-vid.

raw h264 should play with the next version, however getting the duration and seeking does not work for them.

[matthew_eli]

Just out of curiosity, do you already have a 90-inch monitor? :p

No no..I just would like to know whether would be possible to have also in VP4 and below (I have a 460M GTX) the 4K acceleration... ^_^

[nevcairiel]

No no..I just would like to know whether would be possible to have also in VP4 and below (I have a 460M GTX) the 4K acceleration... ^_^

No.
The hardware needs to support it, and well, it doesn't.

[CrAsH cro]

Is it possible to implement delayaudio real time? So one doesn't need to restart MPC and audio sync should be easier

HELL YEAH! That will be great!!!!

[CrAsH cro]

You need to add LAV audio decoder to MPC-HC external filters.
MPC-HC doesnot create the same default graph like Graphstudio.

Well, then it all makes sense ... I thought that MPC-HC version inside SAF is internally configured to use LAV spliter and LAV audio??? will try today....

[v0lt]

http://www.youtube.com/watch?v=QDgN-5S-3DM or http://data.cod.ru/130739
The file is 24.989 fps, but the playback is ~18 fps (look statistics).
Why so?

After converting to matroska (http://www.mediafire.com/?smy82334ozhor36), the problem goes away.

[silkshadow]

I tried searching this thread but couldn't find an answer. I am using v0.38 and the status tab is showing nothing, everything is greyed out. However, everything seems to be rendering and playing fine, so there is no error. I just am trying to see if the arcsoft codec is being used or not.

I'm using Zoom Player 8 RC3 on win7 x86. I have LAV doing all audio formats. I am new to LAV just switched over to it for better DTS-MA support from Gabset, coreavc and FFDshow (replaced with LAV splitter, LAV video and LAV Audio). Output to a receiver via spdif. I am not bitstreaming (should I be?).

Is there something I should be doing to activate the status tab?

Thanks!

[kalston]

It may have been asked before but:

"Can LAV Audio decode DTS-HD?
A: Kind of. On its own, it cannot. But, LAV Audio supports using the ArcSoft DTS decoder, which allows decoding of full DTS-HD. Just drop the "dtsdecoderdll.dll" from the TMT3/5 Codecs directory into LAV Audio's directory, and enjoy. NOTE: This only works on 32-bit!"

That means it only works on a 32bit OS, right? Or are you referring to the 32bit version of LAV Filters? Is there no way to make it work on a 64bit OS?
I feel like this may have been asked already but my quick search was unsuccessful.

I don't have any DTS-HD files right now to test it (all my blurays with DTS-HD are ripped to my HDDs in FLAC using eac3to + ArcSoft DTS decoder).

[nevcairiel]

The OS doesn't matter, the important part is that your player is 32-bit.

[zerowalker]

Hey again, i am starting to use this LAV now and find it very good in many situations which it lacked from start (not complaining;O).
But i still have a recommendation which i really would like to see, and that is to make the subtitles increase to the size of the screen, like if i watch a 1280x720 video, it should be like 1920x1080 video (for subtitles), i hope you understand;D
But of course it´s only my wish, and i don´t really think anyone else wants it bad or if they even care, so do what you want with it;D!

Keep up the good work, Near Carrier;D!

[Keiyakusha]

zerowalker
OMG, again... LAV has nothing to do with subtitles rendering! Change their size in whatever you use to load subtitles... How can people think that they use some features of LAV that never actually was there and probably never will?

[SamuriHL]

Agreed. It's the subtitle renderer's job to scale the subtitles, NOT the splitter. And LAV filters do not include a subtitle renderer.

[nevcairiel]

Its not only about whos job it is, its all out impossible for the splitter to do it. :)

[kalston]

The OS doesn't matter, the important part is that your player is 32-bit.

Great! I just need to try some DTS-HD files now then :)

[Boo]

Think I found a bug.

AVI files (xvid encoded in this case) with zero B-Frames (max_bframes 0) will freeze the player.
MPC-HC - LAV Splitter - LAV Video - LAV Audio v.038

Uploaded a small sample:
http://www.mediafire.com/?t52j52cp1v4gw96

[nevcairiel]

Think I found a bug.

AVI files (xvid encoded in this case) with zero B-Frames (max_bframes 0) will freeze the player.
MPC-HC - LAV Splitter - LAV Video - LAV Audio v.038

Uploaded a small sample:
http://www.mediafire.com/?t52j52cp1v4gw96

Plays just fine here.

[Boo]

I went through the MPC settings and selected EVR Custom instead of madVR and now all is fine.

Thanks for the great work by the way.

[SamuriHL]

Great! I just need to try some DTS-HD files now then :)

Yea I've been using it on my X64 systems no problem. Just make sure you have a 32 bit player and are using the 32 bit version of LAV filters (obviously) and you're good. The reason I'm decoding now (again) vs bitstreaming is that J River's MC17 offers a feature similar to ReClock that stabilizes the playback and can't really do its job when bitstreaming. It works very well.

[zerowalker]

Oh sorry;O
I am not to good with this stuff;O
But can anyone recommend a way to do it then?
I use Directvobsub currently;D!

Sorry but hope you don´t get the wrong impression, i don´t want to annoy you, i just lack knowledge on this parts;S

[secvensor]

In video there are no autolevels, and the audio the codec start playing some audiofiles the click in the beginning.

[pankov]

Any progress on SW based deinterlacing?

or a CUVID deinterlacing with software decoding?
Nev,
what happened to your tests of this? what were the results?
Nev,
did I miss your answer or you missed my question there ... or you simply prefer not to answer it right now?

[nx6]

zerowalker
OMG, again... LAV has nothing to do with subtitles rendering! Change their size in whatever you use to load subtitles... How can people think that they use some features of LAV that never actually was there and probably never will?
Honestly the subtitle size is set by the original typesetter (if we're talking about Subststion alpha format). The script has the resolution of the video listed in it. If you scale your 720p video up to fill a 1080p screen, the size of the subtitles will scale up with the rest of the picture. They're the same percentage to screen height they were before.

Agreed. It's the subtitle renderer's job to scale the subtitles, NOT the splitter. And LAV filters do not include a subtitle renderer.

Its not only about whos job it is, its all out impossible for the splitter to do it. :)

Actually it's not impossible, and I was going to request this feature as well. There is a real setting on Haali's splitter to scale subtitles (substation alpha format at least). I used it last night to watch some files that I found the subtitle size too small to read comfortably from my normal viewing distance, I set the scaling to 120% and it did increase the subtitle size 20% with no change in position or typeface, etc (except really long lines that would go offscreen in their new size now wrapped automatically to prevent this).

[SamuriHL]

Actually it's not impossible, and I was going to request this feature as well. There is a real setting on Haali's splitter to scale subtitles (substation alpha format at least). I used it last night to watch some files that I found the subtitle size too small to read comfortably from my normal viewing distance, I set the scaling to 120% and it did increase the subtitle size 20% with no change in position or typeface, etc (except really long lines that would go offscreen in their new size now wrapped automatically to prevent this).

It really doesn't matter if a splitter can or can't do it. It's not where it SHOULD be done. It should be done by the subtitle renderer.

[zerowalker]

Okay thanks;D
That was the point i asked before, i mean, i currently use LAV for decoding, then ffdshow to decode Uncompressed as i want it to resize to my screen size to make the subtitles better.
So maybe you can add LAV resize?
Or is that as well what a Subtitle renderer should do?

Well if you find a solution anyone, please post it, i would appreciate it;D!