LAV Filters - DirectShow Media Splitter and Decoders

[huokok]

Hi, Nev

I'm not sure but I think this is the proper place for reporting since it might be the issue related to LAV splitter.
The following is the media info of an extracted VOB file from DVDISO.
Playing back using MPC-HC (latest stable version) and displaying "not correct" duration infomation.
Though I can still whatch the "full length" video, I can do nothing with player's navigation bar.
I've noticed that the duration of this video stream is not identical with the audio and container, so I guess it is about the judgement criteria.

If playback using DVD Navigater (file → Open DVD/BD), the duration is correct but I have to view the upfront warning information together with the cute company logo :(

General
Complete name : D:\music\化物语\河野マリナ - その声を覚えてる(DVD)\VIDEO_TS\VTS_01_1.VOB
Format : MPEG-PS
File size : 176 MiB
Duration : 4mn 12s
Overall bit rate mode : Variable
Overall bit rate : 5 856 Kbps

Video
ID : 224 (0xE0)
Format : MPEG Video
Format version : Version 2
Format profile : Main@Main
Format settings, BVOP : No
Format settings, Matrix : Custom
Format settings, GOP : Variable
Duration : 8s 8ms
Bit rate mode : Variable
Bit rate : 4 203 Kbps
Maximum bit rate : 7 900 Kbps
Width : 720 pixels
Height : 480 pixels
Display aspect ratio : 16:9
Frame rate : 29.970 fps
Standard : NTSC
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Interlaced
Scan order : Top Field First
Compression mode : Lossy
Bits/(Pixel*Frame) : 0.406
Time code of first frame : 01:00:00:00
Time code source : Group of pictures header
Stream size : 4.01 MiB (2%)

Audio
ID : 189 (0xBD)-160 (0xA0)
Format : PCM
Format settings, Endianness : Big
Format settings, Sign : Signed
Muxing mode : DVD-Video
Duration : 4mn 12s
Bit rate mode : Constant
Bit rate : 1 536 Kbps
Channel(s) : 2 channels
Sampling rate : 48.0 KHz
Bit depth : 16 bits
Stream size : 46.2 MiB (26%)

Menu


http://i.imgur.com/6Ew1CP8.png

Just for reference, comparing with potplayer which uses built in splitter (please kindly notify me if merely mention this is also against forum's rule)

http://i.imgur.com/7AFBjF3.png

[Coldblackice]

In the MPC "Filters" submenu, it's showing that I have three "LAV Audio" + three "LAV Splitters". Any idea why this might be? It seems to be loading all three audio tracks at the same time, for some reason, and I'm not sure why. I checked the .mkv, thinking maybe all the audio tracks were forced tracks or defaulted, but they're not. None of them are forced, and the main audio is the only "default" audio track.

[michkrol]

In the MPC "Filters" submenu, it's showing that I have three "LAV Audio" + three "LAV Splitters". Any idea why this might be? It seems to be loading all three audio tracks at the same time, for some reason, and I'm not sure why. I checked the .mkv, thinking maybe all the audio tracks were forced tracks or defaulted, but they're not. None of them are forced, and the main audio is the only "default" audio track.

MPC-HC (-BE?) might be to "blame", do you have files with same name, but different extensions in same directory or the beginning matching your movie's filename?
Other than that, try unchecking allow overriding external splitter choice in playback's setting under default track preference section.

[SoupRKnowva]

I've been using LAV Filters a long time, but I just plugged my Xbox HD DVD drive into my computer to watch an HD DVD, and when I watch the movie, it always says in madVR that the source filter says that the movie is 29.970 fps. I know that all hd dvds are soft telecined, is there any way to get LAV Splitter to ignore those flags so I don't have to use ivtc in madVR?

Doing some searching in the thread i saw that there was a dev build that had an ignore soft telecine flag option, but that was quite old, being from way back in 2012.

thanks for any help!

[clsid]

You can tell madVR how to handle the video.
Press Ctrl+Alt+Shift+T

[vinnytx]

Hi,

I need to register two times Lavfilters video decoder each with different settings (I’d like to set one with cuvid acceleration and the other one with dxva2 (copy-back)). I tryed to rename LAVVideo.ax but I cannot apply different settings (the registered codec is always the same). Is it possible?

[nevcairiel]

No, it is not possible.
If you're doing this in your own application, you can configure LAV Video at runtime, though.

[clsid]

GCC 4.8.3 is now available ;)

[nevcairiel]

GCC 4.8.3 is now available ;)

I've a new GCC package up already:
http://files.1f0.de/mingw/mingw-w64-gcc-4.8.3-stable-r11.7z

[wanezhiling]

http://www.sendspace.com/file/ts1cny
No duration and can't seek then.

I found that old mpc-hc flv splitter works fine.:)

[clsid]

@wanezhiling

Please submit such broken files directly to FFmpeg:
1) https://trac.ffmpeg.org/register
2) https://trac.ffmpeg.org/newticket

First reproduce problems with latest ffplay.exe, which you can download here:
http://ffmpeg.zeranoe.com/builds/
(latest FFmpeg static version is what you need)

Use this command-line to get a full list of command-line options:
ffplay -h > ffplay_options.txt

For example to seek to position of 30 seconds:
ffplay -ss 30 sample.flv

[huhn]

i found a bug or a strange behavior of lav splitter.
a video file with 3 ass subtitles one track is default, one track is forced and one track is not flagged all with eng.
with no preferred language settings the forced track is loaded. with preferred language eng the default is loaded.

it looks like it is not possible to load both ass tracks so lav is at least displaying 1. but why did the track change with preferred language setting even through both have the same language?

[nevcairiel]

Once you enter a language, the "Default" flag takes dominance over forced, since with a language match it is assumed you want full subtitles, at least if you are in the default subtitle mode.

[huhn]

so this is a compromise because it is not possible to display both ass tracks at the same time?

[nevcairiel]

This has nothing to do with displaying two tracks at the same time, its just how the selection works in default mode.

[Reino]

Audio=BassAudioSource("sample.flac")
#Audio=FFAudioSource("sample.flac",cache=false)

Video=ImageSource("cover.png", end=AudioLength(Audio)*25/AudioRate(Audio), fps=25)

Video

========================================================================

AVI/WAV File Source -> Color Space Converter -> Video Renderer - 27MB Mem Usage.
LAV Splitter Source -> LAV Video Decoder -> Video Renderer - 164MB Mem Usage!

Audio=BassAudioSource("sample.flac")
#Audio=FFAudioSource("sample.flac",cache=false)

Video=ImageSource("cover.png", end=AudioLength(Audio)*25/AudioRate(Audio), fps=25)

AudioDub(Video,Audio.ConvertAudioTo16bit())

========================================================================

AVI/WAV File Source -> Color Space Converter -> Video Renderer - 29MB Mem Usage.
\-> Audio Switcher -> Audio Renderer

LAV Splitter Source -> LAV Video Decoder -> Video Renderer - 297MB Mem Usage!
\-> Audio Switcher -> Audio Renderer

Play -> Filters -> LAV Splitter Source - V: rawvideo, bgr24, 360x360, while LAV Splitter Source - Properties -> Pin Info: Video: BGR□�� 360x360 25fps.
What's up with that? Is LAV Video Decoder really necessary? Can't LAV Splitter Source connect to the video renderer directly?
The same goes for LAV Audio Decoder if I hadn't disabled "pcm - Raw PCM Types (including QT PCM)".

[nevcairiel]

LAV Video Decoder is necessary, otherwise you need the color space converter, which is butt-slow and very feature limited. LAV Video in combination with LAV Splitter on the other hand can handle all sorts of raw video, not only from AviSynth, but also in files.
LAV Splitter cannot properly talk to video renderers directly, as handling raw video needs a lot of special handling, so why bother duplicate that.

Also, I'm not even going to comment on 150-250mb of extra memory usage. If you cannot spare that, just don't use LAV.

[kerimcem]

nightly bulid link? thanks..

[mzso]

I have a small issue. With one of the mkv files, if I seek sometimes the video hangs for seconds (5-10) and the audio immediatly plays. After that the video continues playing from the appropriate time. I guessing it's not intended behavior. Usually on seek the playback only starts after some delay with video. I don't remember having this problem with other files before.

[foxyshadis]

I have a small issue. With one of the mkv files, if I seek sometimes the video hangs for seconds (5-10) and the audio immediatly plays. After that the video continues playing from the appropriate time. I guessing it's not intended behavior. Usually on seek the playback only starts after some delay with video. I don't remember having this problem with other files before.

That just means it wasn't remuxed properly, or someone stripped the cues to save a few bytes. Remux it with mkvtoolnix and it'll seek fine.

[filler56789]

nightly bulid link? thanks..

http://nightly.mpc-hc.org/

http://www.vdisk.cn/betaking

http://pan.baidu.com/share/link?uk=2214911777&shareid=497331#dir/path=%2F%E8%87%AA%E7%BC%96%E8%AF%91%E8%BD%AF%E4%BB%B6

[nevcairiel]

There are no nightly builds of LAV, as there is no need for them, and I will not endorse any third party builds out of my control.

[kerimcem]

ok. thanks..
my old pc ati3650, small problem...some mkv files dont work dvxa2 native...pot pleyer works well!....

[QUOTE]Genel
Eşsiz ID :195688951960876225999158683055549927265 (0x9338523C91D99A4FBC833A2D83C94F61)
Tam isim :H:\film\Txxxxxxxxxxxxxx.mkv
Biçim :Matroska
Biçim sürümü :Version 2
Dosya boyutu :8.27 GiB
Süre :2s 22dk
Kapsamlı bit oranı :8 303 Kbps
Kodlanma tarihi :UTC 2012-08-04 08:39:53
Yapım uygulaması :mkvmerge v5.3.0 ('I could have danced') built on Feb 9 2012 10:38:07
Yapım kütüphanesi :libebml v1.2.3 + libmatroska v1.3.0

Görüntü
ID :1
Biçim :AVC
Biçim/Bilgi :Advanced Video Codec
Biçim profili :High@L4.1
Biçim ayarları, CABAC :Evet
Biçim ayarları, ReFrames :12 kare
Kodek ID :V_MPEG4/ISO/AVC
Süre :2s 22dk
Bit oranı :6 800 Kbps
Genişlik :1 280 piksel
Yükseklik :534 piksel
Görüntü en-boy oranı :2.40:1
Kare hız modu :Sabit
Kare hızı :23.976 kare/s
Renk alanı :YUV
Krom altörnekleme :4:2:0
Bit yoğunluğu :8 bit
Tarama türü :Aşamalı
Bit/(Piksel*Kare) :0.415
Akış boyutu :6.60 GiB (80%)
Yapım kütüphanesi :x264 core 125 r2208 d9d2288

[kerimcem]

pic..
mpc+lav+dxva native
http://i.hizliresim.com/59EoGl.jpg
pot internal..
http://i.hizliresim.com/b8ZgBn.jpg

[LigH]

I don't understand turkish easily ... but "Ref frames : 12" is suspicious, and a cropped resolution (534 px height is not even MOD 16) may in general not be DXVA compatible (I believe).

[mzso]

That just means it wasn't remuxed properly, or someone stripped the cues to save a few bytes. Remux it with mkvtoolnix and it'll seek fine.

Nah, it only happens on specific locations.

It's really weird. It seems it's potplayer specific. I found that I could jump to the exact frame with the same filter setup with mpc-hc and it didn't happen there.
But also if I remux the video with ffmpeg it doesn't happen. So I need Potplayer, with LAV as a splitter and the video muxed with mkvmerge. (the original was also mkvmerge muxed, but an older version)

[huhn]

I don't understand turkish easily ... but "Ref frames : 12" is suspicious, and a cropped resolution (534 px height is not even MOD 16) may in general not be DXVA compatible (I believe).

it looks more like the gpu doesn't support dxva2 and potplayer supports dxva"1".

even the old ion nvidia 9300 supports non mode of 16 videos and 1080p is mod of 8 too.

[LigH]

Well, 1080p is usually encoded as 1088 lines with 1080 lines crop area.

And 534 is not even a multiple of 4. But I am not sure which DXVA version has which limitations. Some configurations may only enable it for a few specific resolutions even?

[huhn]

at the end with h264 16 is always used.
i found this on the english wiki for nvidia: http://en.wikipedia.org/wiki/Nvidia_PureVideo
All third generation PureVideo hardware (G98, MCP77, MCP78, MCP79MX, MCP7A) cannot decode H.264 for the following horizontal resolutions: 769–784, 849–864, 929–944, 1009–1024, 1793–1808, 1873–1888, 1953–1968 and 2033–2048 pixel[6]

but i think the real problem lies in the DXVA decoder version LAVfilter only supports 2.0 and only full acceleration.

even the 6770 can't do mpeg2 dxva with LAVfilter because it can't do it with full acceleration. the old internal mpc-hc DXVA decoder can do it but not using full acceleration.

[nevcairiel]

The problem with that video has 12 reference frames, and LAV enforces a 11 frame limit on such old GPUs because of corruption issues with a bunch of videos, and contrary to other decoders it doesn't have an option to disable ref frame checks.
Maybe the video just claims 12 in the header but for som reason never uses the full set, or some other factors need to be involved for the corruption to occur, in any case, thats the reason DXVA is not used for that video on that GPU.

Luckily, no commercial content exists that even uses such encoding settings, and despite the user masking the movie name its quite obviously illegally obtained (as the original post that I got notified by in an email still contained the full name before he edited it) and as such we shall stop discussing it per rule #6.

[NikosD]

Latest Intel's 3621 driver has official support of HEVC decoding (but not transcoding)
From the release notes:
HEVC decode now supported by the driver and video players can now take advantage of the GPU accelerated decode support offered by Intel

Transcoding to HEVC is currently not supported.

I didn't find a HEVC device decoder exposed using DXVA Checker, but I'm pretty sure that you may be interested now in HEVC decoding, after the official support by the driver and Intel.

[nevcairiel]

The HEVC_Main_VLD device is still present in the device enumeration for me.
But it'll be a while before I would have time to poke at this.

[kolak]

Nev,
Is it possible to add decoding support for R210 and R10K formats?
They are quite plain- just packed 10bit RGB. Ffmpeg has full support for them.

[mindbomb]

which intel hardware for hevc decode? just haswell?

[NikosD]

The driver 3621 can be used by Ivy and Haswell, so both platforms should be supported.

It seems though, that there are some restrictions.
For example, my Haswell Pentium G3420 with Intel HD graphics, doesn't have HEVC support.

I bet the same for HD 2500 Ivy iGPU processors.

[feelingblue]

a little info:

if i set the output of the decoder as RGB32 which is the algorithm of the chroma upsampling?

in the "color space evautation" of spears and munsil
(see the attached image)
i have some disallineaments and diagonal lines are a litte jagged.

thanks

[nevcairiel]

RGB32 output uses simple bilinear upscaling. Its meant to be a fast fallback alternative at OK quality if you need RGB32 for some reason, not the absolute best quality. Its usually better to leave the conversion to your renderer, since it can perform it much faster in potentially higher quality on the graphics card.
I did take care to perform the conversion properly (in high bit depth, and with dithering), however the algorithm remains limited to bilinear.

[nikola]

Perhaps this question rather belongs to the MPC-HC forum, but I'll give it a go here because it might have been implemented already in LAV Filters:

Is there a way to instruct LAV Splitter to select a specific audio track (irrespective of preferred audio languages in the settings of LAV Audio) when opening an MKV in MPC-HC? Does LAV Filters inspect the command-line arguments of the player it was created in?

[pigster]

Please can somebody help me with this?

https://code.google.com/p/lavfilters/issues/detail?id=444

It is fully reproducible (at least on my computer), and by trial and error it can be isolated down to LAV Splitter

Thank you

[ikarad]

I have a problem with lavvideodecoder 0.61.2 used like standalone or with lavfilter included internally in mpc-hc.
On some video, I have a green bar
http://img11.hostingpics.net/thumbs/mini_811227Sanstitre.jpg (http://www.hostingpics.net/viewer.php?id=811227Sanstitre.jpg)

With ffdshow no problem
http://img11.hostingpics.net/thumbs/mini_303257Sanstitre2.jpg (http://www.hostingpics.net/viewer.php?id=303257Sanstitre2.jpg)

video
http://lazylily.electrochef.us/haiyore-nyaruko-san-w-ova-is-out/


edit: Problem exists with lavvideodecoder 0.60.1 but not with lavvideodecoder 0.59

edit: The problem arrives if I use ffdshow raw filter with lavfilter 0.60.1 and 0.61.2 (The problem arrives with only some videos, not all video). If I use lavfilter 0.59 with ffdshow raw filter, there is not problem.

How solve this problem ?

[pancserzso]

Sorry, I know this must have been asked about a 1000x times here, but I keep finding contradicting information on the internet.

When using a classic stereo "full-range" speaker setup (like people have been using to listen to music for 50 years), what is the recommended downmixing settings?

Should LFE be 0.71? Why is it 0 on default? Isn't it cut at somewhere around 80-100 Hz? Every single decent stereo system can go way lower then 80 Hz, without any dedicated subwoofer. I think 20-25 Hz is normal for proper speakers.

Also, should surround be 1.0 or 0.71?

[e-t172]

Should LFE be 0.71? Why is it 0 on default? Isn't it cut at somewhere around 80-100 Hz? Every single decent stereo system can go way lower then 80 Hz, without any dedicated subwoofer. I think 20-25 Hz is normal for proper speakers.

First of all, 20-25Hz is certainly not typical for full range speakers, which usually stop near 40-50Hz. A full range speaker that goes all the way down to 20Hz is typically very expensive, and usually takes the form of a normal speaker combined with a subwoofer in the same box.

Second, even if the speakers are able to go that low, it doesn't mean they're able to handle lots of output at these frequencies without producing significant distortion (clipping). LFE is meant to carry loud to very loud low frequency sound effects, which are reproduced very poorly by typical speakers or even cheap subwoofers.

This is why 0 is the default for downmixing LFE in LAV Audio: the rationale is, people who want to downsample to stereo probably don't have what it takes to reproduce this very low frequency, high output content.

For the standard downmixing levels for LFE and Surround, see ITU-R BS.775 (http://www.itu.int/rec/R-REC-BS.775/en) which is very clear and even has a whole section dedicated to explaining how LFE works. Page 11 states that the proper downmixing coefficient for surrounds is 0.71, while it can be deduced that the proper coefficient for LFE (if you want to retain it) is +4dB (+10dB as stated in paged 14, -6dB because of two channel coherent acoustic summation at low frequencies), or 1.58.

[pancserzso]

For the standard downmixing levels for LFE and Surround, see ITU-R BS.775 (http://www.itu.int/rec/R-REC-BS.775/en) which is very clear and even has a whole section dedicated to explaining how LFE works. Page 11 states that the proper downmixing coefficient for surrounds is 0.71, while it can be deduced that the proper coefficient for LFE (if you want to retain it) is +4dB (+10dB as stated in paged 14, -6dB because of two channel coherent acoustic summation at low frequencies), or 1.58.

Thanks, I've looked into that document you've linked. But still what is the "recommended" value for LFE for a normal stereo system, isn't 0 and 1.58 a bit of an extreme? I mean isn't it reasonable to take a bit of LFE, like 0.30, which still doesn't over-power the speakers but helps a bit with lower freq sounds?

[e-t172]

Well yeah, since 0 and 1.58 are both acceptable values, it follows that any value between the two would be acceptable as well. It would be purely arbitrary though, since there's no easy way to calculate an "optimal" value.

[cyberbeing]

nevcairiel, now that MKVToolNix 7.0.0 has been released which fixes what are hopefully the final major muxing bugs with CueDuration and CueRelativePosition, what are your thoughts about John Peebles's patch which he posted a few weeks ago to Issue #302 (https://code.google.com/p/lavfilters/issues/detail?id=302#c3). As mentioned there, it may make sense to have him remove the partial workaround for MKVToolNix <=6.9.1, so the patch only contains the fully complaint implementation. Either way, it would be nice to see this long awaited functionality make it into your next Lav Filters release.

[huokok]

@clsid
Would you please make it known to be lav splitter?:rolleyes:
:thanks:

http://i.imgur.com/3lnxhbK.jpg

[huhn]

nevcairiel, now that MKVToolNix 7.0.0 has been released which fixes what are hopefully the final major muxing bugs with CueDuration and CueRelativePosition, what are your thoughts about John Peebles's patch which he posted a few weeks ago to Issue #302 (https://code.google.com/p/lavfilters/issues/detail?id=302#c3). As mentioned there, it may make sense to have him remove the partial workaround for MKVToolNix <=6.9.1, so the patch only contains the fully complaint implementation. Either way, it would be nice to see this long awaited functionality make it into your next Lav Filters release.

does this have something to do with switching to a chapter in the middle of a subtitle line that's not show at all?

[cyberbeing]

does this have something to do with switching to a chapter in the middle of a subtitle line that's not show at all?

Yes, CueDuration and CueRelativePosition splitter support enables perfect subtitle seeking with embedded subtitles, comparable with external subtitle seeking behavior. If you care about this, you should start muxing all your MKVs with MKVToolNix >=7.0.0 for future proofing. Also noteworthy that a simple remux of existing MKVs will rewrite the Cues, fixing bugged CueDuration and CueRelativePosition entities from MKVToolNix <=6.9.1, so it shouldn't be too hard bringing older MKVs up-to-date.

[nevcairiel]

I haven't had time to look at the patch yet, only briefly browsed through it. But in general hacks for old versions are bad.

And if someone wants to help, teach him about github pull requests, that makes it so much easier for me when I find time to look at it.

[Kurtnoise]

@Nevcairiel: it seems that the last FFmpeg commit broke something :

git.exe submodule update --init

Submodule 'ffmpeg' (git://git.1f0.de/ffmpeg.git) registered for path 'ffmpeg'
Submodule 'libbluray' (git://git.1f0.de/libbluray.git) registered for path 'libbluray'
Submodule 'qsdecoder' (git://git.1f0.de/qsdecoder.git) registered for path 'qsdecoder'
Cloning into 'ffmpeg'...
fatal: reference is not a tree: 236b9be7dbc5d92c1fee483684624666323df078
Cloning into 'libbluray'...
Submodule path 'libbluray': checked out 'd8cb81c5d0ede075f4e74bc43a651ec39c71d670'
Cloning into 'qsdecoder'...
Submodule path 'qsdecoder': checked out 'cadb1790a43641f7d661981c1c98f1cacc733a97'
Unable to checkout '236b9be7dbc5d92c1fee483684624666323df078' in submodule path 'ffmpeg'


git did not exit cleanly (exit code 1) (146235 ms @ 12/06/2014 06:25:42)