LAV Filters - DirectShow Media Splitter and Decoders

[watchman]

Why are you using WASAPI, though?

And also, that's usually how compressors work, including ReClock's. You may get less noise if you boost quiet sounds instead of lowering loud sounds (cause this makes you hit the analog volume higher and hiss increases).

Well maybe I'm missing something because I'm not really expert in this stuff, but from I read, I always thought that loudness equalization leads to distortion, which is mostly noticeable in victims of loudness war (probably lot of you heard last album of Metallica - Death Magnetic, which is totally distorted and sounds like a piece of crap).

Also according to this graph, compression is about making louder parts quieter:
http://www.sciencemedianetwork.org/wiki_source/images/b/b1/DRC3.jpg

Noise is not what I really care about because of my quite decent integrated amplifier. I'm using SW player volume down all the time without noticing any hiss at all even on higher volume levels (amplifier is at about 20%, very rarely at 50%).

Once I tried to use free version of this popular EQ, which had good references on head-fi forums (http://www.aixcoustic.com/index.php?id=13) to boost my bass a little bit (2-3db), and I immediately noticed really high distortion. I don't know if that free version is bugged or what, but after that experience, I stopped experimenting with volume boosts.

So only thing that bothers me is not to add any distiortion if possible. But after a quick try of reclock compressor or even vista default mixer, l wasn't able to notice anything similar to electri-q. Maybe than it really is something wrong just with that specific piece of sw and properly implemented sound boost algo isn't noticable if not exaggerated :confused:

[STaRGaZeR]

That's a nice way of doing it, instead of spamming "Update ffmpeg" commits.

I'll report another bug soon regarding MPEG-2, here's a sample if you want to play with it. libmpeg2 plays it fine.

http://www.mediafire.com/?cye2dhgra9du6v8

This got fixed today in ffmpeg. Tested and confirmed in LAV. Update? :p

Again big thanks to Michael for debugging this!

[nevcairiel]

This got fixed today in ffmpeg. Tested and confirmed in LAV. Update? :p

Again big thanks to Michael for debugging this!

But i just updated last night. :p
Oh well, doesn't hurt to update again, its only been a handful of changes, a small risk of regressions.

The new subtitle selection is also mostly done, i just need to write some documentation for it now.

[kirakami]

does lav supports 10 bit output decoding? I am using MPC-HC
not like ffdshow which converts 10 bit to 8bits when decoding
Said nevcairiel: ffdshow does not support 10bit output, it'll always be converted to 8-bit.

[nevcairiel]

does lav supports 10 bit output decoding?

Yes LAV supports 10-bit output. Note, however, that madVR is the only renderer (that i know of) which accepts 10-bit video. With EVR, VMR or Haali, the video will still be converted to 8-bit, however the 8-bit conversion is using a high quality mathematically accurate dithering, unlike ffdshow which uses incorrect dithering.

[Nevilne]

Could you please add utvideo support? ( http://git.libav.org/?p=libav.git;a=commit;h=0d8506b8c52659c5bfff9535391d5e95ddcd45f1 )

The native decoder only really works in virtualdub.

[hubblec4]

nevcairiel, have you planned a tray-icon in the taskbar to show all avalible streams. and to select the streams there like in the Haali Splitter?

[nevcairiel]

Could you please add utvideo support? ( http://git.libav.org/?p=libav.git;a=commit;h=0d8506b8c52659c5bfff9535391d5e95ddcd45f1 )

The native decoder only really works in virtualdub.

I'll add it after the next ffmpeg update, if i remember. :p

nevcairiel, have you planned a tray-icon in the taskbar to show all avalible streams. and to select the streams there like in the Haali Splitter?

http://code.google.com/p/lavfilters/issues/detail?id=1

[madshi]

nevcairiel, have you planned a tray-icon in the taskbar to show all avalible streams. and to select the streams there like in the Haali Splitter?
FWIW, if you use madVR, you can switch the LAV Filters streams through the madVR tray icon.

[nevcairiel]

FWIW, if you use madVR, you can switch the LAV Filters streams through the madVR tray icon.

Most people that request that feature in a stream switching context are usually using some kind of player which is rather "limited" - no stream selection in the player, and no support for 3rd party renderers (like WMP/WMC).

One of these days, i have to figure out how to show a tray icon, hate interacting with the windows GUI. :p

[madshi]

Most people that request that feature in a stream switching context are usually using some kind of player which is rather "limited" - no stream selection in the player, and no support for 3rd party renderers (like WMP/WMC).
Ah, that makes sense.

One of these days, i have to figure out how to show a tray icon, hate interacting with the windows GUI. :p
Managing the tray icon itself is pretty easy, see API "Shell_NotifyIcon". I think the majority of your tray icon development time will go into creating a nice looking popup menu for the stream selection.

[roytam1]

I'll add it after the next ffmpeg update, if i remember. :p



http://code.google.com/p/lavfilters/issues/detail?id=1

And please test vc1/vc1i decoding again after ffmpeg update as some bugs in vc1dec are fixed according to libav git log.

[nevcairiel]

And please test vc1/vc1i decoding again after ffmpeg update as some bugs in vc1dec are fixed according to libav git log.

I revert all VC-1 patches because the new VC-1i decoding crashes more then it decodes anything, and if it decodes anything its only a corrupted mess - and on top of that, even introduced artifacts in previously working progressive samples.

[kirakami]

Can you add Input/Output "Status" for LAV Video Decoder too?
currently only LAV Audio Decoder have Input/Output in Status [Tab]

using LAV 0.37 with MPC-HC

adding Status will help easier to understand for us
what Video input used what Video output used YV12 or P010

[kirakami]

edit: removed duplicate

[kirakami]

ASS subtitle Filter Broken
Anime uses ASS subtitles mainly
LAV Splitter didn't play subtitle at all except for Opening Karaoke sub
ASS sub renders perfect with xy-vsfilter
can you fix internal LAV Splitter subtitle filter?

[nevcairiel]

ASS subtitle Filter Broken
Anime uses ASS subtitles mainly
LAV Splitter didn't play subtitle at all except for Opening Karaoke sub
ASS sub plays perfect with xy-vsfilter
can you fix internal LAV Splitter subtitle filter?

LAV Splitter has nothing to do with how your subtitles are rendered.

[kirakami]

LAV Splitter has nothing to do with how your subtitles are rendered.

Does it mean LAV Filter does not have its own Subtitle Renderer?

[Keiyakusha]

Does it mean LAV Filter does not have its own Subtitle Renderer?

Sorry, but answer to your questions is So obvious that it looks like trolling. No there is no such filter and there is no need for it to be there.

[STaRGaZeR]

But i just updated last night. :p
Oh well, doesn't hurt to update again, its only been a handful of changes, a small risk of regressions.

The new subtitle selection is also mostly done, i just need to write some documentation for it now.

Yeah, I have been testing that too. Default seems to work just fine!

[e-t172]

Well maybe I'm missing something because I'm not really expert in this stuff, but from I read, I always thought that loudness equalization leads to distortion, which is mostly noticeable in victims of loudness war (probably lot of you heard last album of Metallica - Death Magnetic, which is totally distorted and sounds like a piece of crap).

You can't do dynamic range compression without distortion (almost by definition).


Once I tried to use free version of this popular EQ, which had good references on head-fi forums (http://www.aixcoustic.com/index.php?id=13) to boost my bass a little bit (2-3db), and I immediately noticed really high distortion. I don't know if that free version is bugged or what, but after that experience, I stopped experimenting with volume boosts.

An EQ in itself doesn't distort the sound. It can, however, clip the output (depending on the input), which results in distortion. You should try with a lower input volume.

[Andy o]

Well maybe I'm missing something because I'm not really expert in this stuff, but from I read, I always thought that loudness equalization leads to distortion, which is mostly noticeable in victims of loudness war (probably lot of you heard last album of Metallica - Death Magnetic, which is totally distorted and sounds like a piece of crap).

Also according to this graph, compression is about making louder parts quieter:
If you're editing, you can do whatever you want with compression, including of course making loud sounds quieter. But on-the-fly compression algorithms don't have to do that. If it's clipped in the original, there's nothing it can do. The algorithm should also be smart enough not to clip itself, so you wouldn't have the problem with Death Magnetic.

Once I tried to use free version of this popular EQ, which had good references on head-fi forums (http://www.aixcoustic.com/index.php?id=13) to boost my bass a little bit (2-3db), and I immediately noticed really high distortion. I don't know if that free version is bugged or what, but after that experience, I stopped experimenting with volume boosts.

That's different cause of two things. First is you're just boosting. The real-time compression algorithms used for watching movies should be smart enough to be able to tell when quiet sounds need boosting. If for instance you have a very quiet sound out of one channel, and a loud one out of another, at the same time, the quiet sound won't get boosted cause it would boost everything, including the loud sounds too, and they could clip.

Second, you're just boosting some frequency range. It had been a known problem with iPods that when using EQ you could get clipping fairly easily. Apple JUST fixed it with the iPod Touch 4 and probably others. Fix was simple, boost frequency, then dial back overall gain.

[hubblec4]

another question.

is it possible to play mkvs with multiple Editons inside?

[NanoBot]

"Editions" and "ordered chapters" are only a different names for the same feature, which is actually not included in the matroska part of the LAV_splitter. Therefore ATM you will have to use Haalis splitter if you need this. Hopefully, this feature will be integrated in the future, but of course it is totally nevcariel choice if and when this may happen.

[kirakami]

any plans for Hardware Acceleration CUDA & DXVA?
only CUVID is included says 'Not Available'

[Xaurus]

any plans for Hardware Acceleration CUDA & DXVA?
only CUVID is included says 'Not Available'
Do you have an Nvidia GPU? If not, it won't work.

[THX-UltraII]

I want to swap my ATI HD5450 for a NVIDIA card for two reasons:

1. Use CUVID and that way:
2. reduce CPU usage. I want to use my CPU for a heavy frame interpolation script with avisynth.

What the best card for CUVID?

[BatKnight]

I want to swap my ATI HD5450 for a NVIDIA card for two reasons:

1. Use CUVID and that way:
2. reduce CPU usage. I want to use my CPU for a heavy frame interpolation script with avisynth.

What the best card for CUVID?
If you can afford it, and want the latest tecnology, I would recommend a GeForce GTX 550 Ti, or higher. (FWIW the GTX550 has 192 CUDA cores)
Here in Portugal, such a card is available for about 125 EUROS.

The GT440 or the GTS450 would also be good alternatives, but are from an older generation.

You may compare other editions here: http://www.geforce.com/Hardware/GPUs

[Nicola]

Hi. I asked this on the CUVID thread but I got pointed here, so here I fire my question.
I'm trying to fix an issue I have with h264 decoding: when video has 9, or 16 ref frames, the seeking will disable the video; I have to seek some more to get the video back on, and it doesn't always work. The resolution of the video doesn't seems to be important, it happens for both dvd or fullhd resolutions.
Using mpc-hc as player, haali as splitter (need it for ordered chapters), ffdshow for audio decoding (exept FLAC), video decoding done via software, for fullhd the cpu (AMD 4cores) usage is less than 20% (mardock scramble), haali or madvr for rendering.
So the question is: what is causing this seek issue? my box horsepower should be more then enough, and there aren't spikes of cpu or gpu usage when it happens.

[roytam1]

Got some feedback regarding my rv34seekkeyframe patch/"hack":
The patch did its job well, but sometimes the audio become muted. When seeking to same point again, the audio recovers.

Actually whats the problem between LAV Audio, LAV Video, and the whole DirectShow graph?

[nevcairiel]

Got some feedback regarding my rv34seekkeyframe patch/"hack":
The patch did its job well, but sometimes the audio become muted. When seeking to same point again, the audio recovers.

Actually whats the problem between LAV Audio, LAV Video, and the whole DirectShow graph?

I doubt that just delaying video frame delivery would cause the audio to stop, because audio actually defines the reference clock, not video.

[e-t172]

…unless you're using ReClock.

[Volfield]

New nightly:
http://roy.orz.hm/lavf-w32-nightlies/lavf-my111019-rv34seekkeyframe-c73aa37.7z

diff:
http://roy.orz.hm/lavf-w32-nightlies/lavf-my111019-rv34seekkeyframe-c73aa37.diff

On this nightly when i set subtitles to advanced and open mp4 file without subtitle my players (pot and mpchc) crash. The same file plays ok when i set default.

[roytam1]

I doubt that just delaying video frame delivery would cause the audio to stop, because audio actually defines the reference clock, not video.

Then I wonder if this will happen in MPEG2VIDEO and VC1 as well.

[Andy o]

Hi. I asked this on the CUVID thread but I got pointed here, so here I fire my question.
I'm trying to fix an issue I have with h264 decoding: when video has 9, or 16 ref frames, the seeking will disable the video; I have to seek some more to get the video back on, and it doesn't always work. The resolution of the video doesn't seems to be important, it happens for both dvd or fullhd resolutions.
Using mpc-hc as player, haali as splitter (need it for ordered chapters), ffdshow for audio decoding (exept FLAC), video decoding done via software, for fullhd the cpu (AMD 4cores) usage is less than 20% (mardock scramble), haali or madvr for rendering.
So the question is: what is causing this seek issue? my box horsepower should be more then enough, and there aren't spikes of cpu or gpu usage when it happens.

Have you isolated the issue to LAV Video yet?

[nevcairiel]

On this nightly when i set subtitles to advanced and open mp4 file without subtitle my players (pot and mpchc) crash. The same file plays ok when i set default.

Did you enter any advanced configuration, or was the box empty?

[Volfield]

Did you enter any advanced configuration, or was the box empty?

I enter this: jpn:eng jpn: pol pol: off (without spaces after : )

[nevcairiel]

I enter this: jpn:eng jpn: pol pol: off (without spaces after : )

Thanks, should be fixed.

[Volfield]

Thanks, should be fixed.

Thanks. Can't wait for new nightly :)

[SamuriHL]

Oh sure, I JUST got done building. Figures. :p

[adam777]

Hi Nev,
Haven't used LAV filters for watching DVB-T broadcasts for about a month, but today I tried and quickly noticed a regression in the LAV audio component of 0.37, comparing to 0.36.
In 0.36 the audio is decoded fine, while in 0.37 the audio is decoded with lots of "noise" on top.
Also happens with the following dump when playing it offline in MPC-HC.
Here is a sample of a raw mpeg-ts dump, captured via the DVB-T application.
http://www.multiupload.com/K1JY38R5SK

[nevcairiel]

Hi Nev,
Haven't used LAV filters for watching DVB-T broadcasts for about a month, but today I tried and quickly noticed a regression in the LAV audio component of 0.37, comparing to 0.36.
In 0.36 the audio is decoded fine, while in 0.37 the audio is decoded with lots of "noise" on top.
Also happens with the following dump when playing it offline in MPC-HC.
Here is a sample of a raw mpeg-ts dump, captured via the DVB-T application.
http://www.multiupload.com/K1JY38R5SK

I figured out what broke it, its a change in ffmpeg. I'll revert it for the time being, and let them know about the issue.

[kirakami]

MPC-HC crashes when i
LAV audio decoder
Enabled Audio Delay
& press "-" minus key
i wanted set audio to play -10000 ms
due to video
http://www.mediafire.com/download.php?a8nuhat16bn0ole
i was watching has audio/video 10sec sync issue (audio plays after 10secs)

[hoborg]

Hmm, i just tryed to play some .WAV with DTS inside and it doesnot work any longer - only noice.
Was not that working before?

[adam777]

I figured out what broke it, its a change in ffmpeg. I'll revert it for the time being, and let them know about the issue.

Thanks, appreciated :)

[06_taro]

Thx for supporting vobsub in mp4 files. Hope for officially supporting ordered chapters.

Custom build ( 32 and 64 bit )
LAVFilters-git-r1365(2dc15e5).7z: MediaFire (http://j.mp/LAVFilters-r1365), NMM-Mirror (http://nmm.me/2c)

PS. Could you please add an option to prefer text formats subtitles or image formats when they are in the same language?

[ikarad]

I figured out what broke it, its a change in ffmpeg. I'll revert it for the time being, and let them know about the issue.

Can we expect to add a deband filter and a TIVTC filter in lav video?

I ask that because with 10bit video, I can't use ffdshow if not output is transformed in 8bit. With only lav video chain stay in 10bits.

[roytam1]

Thx for supporting vobsub in mp4 files. Hope for officially supporting ordered chapters.

Custom build ( 32 and 64 bit )
LAVFilters-git-r1365(2dc15e5).7z: MediaFire (http://j.mp/LAVFilters-r1365), NMM-Mirror (http://nmm.me/2c)

PS. Could you please add an option to prefer text formats subtitles or image formats when they are in the same language?

I wonder if you've change anything?
If so it is nice to give out a diff file for the changes. (git diff > changes.diff is handy)

[Keiyakusha]

Hope for officially supporting ordered chapters.
Are you saying there is somewhere unofficial build with ordered chapters support or something like that?

[Mixer73]

Nev,

I've come across a strange possible bug in LAV Filters with LAVCUVID.

I'm using it with PotPlayer in dual head, playing video on one screen while I do other stuff on the other screen, and sometimes something like a facebook game can make the video play with reversed field order (I think... its really jittery/wrong looking).

If I pause/play it works perfectly again.

Currently on a fresh format of Win7 64bit/GTX260 card, EVR CP.

Any suggestions of how I can further troubleshoot?