LAV Filters - DirectShow Media Splitter and Decoders

[nevcairiel]

LAV Filters 0.81

LAV Splitter
- NEW: Support for APV (Advanced Professional Video) video streams
- Fixed: VVC in MP4 without CTTS did not play properly
- Fixed: AV1 streams with invalid metadata did not get handled correctly

LAV Video
- NEW: Support for decoding APV (Advanced Professional Video)
- Changed: Re-designed pixel format mapping to be based on a heuristic rather then hard-coded, improving support for rarely-used formats
- Fixed: Deinterlacing of 4:2:2 videos was broken in 0.80

LAV Audio
- Fixed: Bitstreaming TrueHD from Blu-rays with seamless branching could result in out-of-sync audio, or a noticeable gap

Download: Installer (both x86/x64) -- Zips: 32-bit & 64-bit

Finally getting another long-standing TrueHD bitstreaming issue resolved. Otherwise the usual, FFmpeg updates and tackling anything that was immediately actionable and reported.

As always, please report issues, especially regressions, in as much detail as possible, and with a sample file.

[StainlessS]

Thankyou kind sir.

[clsid]

Some crash fixes:
https://github.com/clsid2/LAVFilters...519a249104d25f
https://github.com/clsid2/LAVFilters...d38b0c42f82818
https://github.com/clsid2/LAVFilters...95069d86e9e9ca
These can happen when accessing tray icon during loading.

And in libavutil\tx.c
https://drdump.com/Problem.aspx?ProblemID=1016430
Disabling those blocks under CONFIG_SMALL‎ fixes it. Seems like unnecessary debug/trace code for release builds.

[manolito]

Hi clsid,

interesting bug report, but frankly as a non-dev I do not really know what to do with it...

I am unable to compile my own version of LAV Filters, so I probably need to wait for nevcairiel to publish a fixed version. But anyways, thanks a lot for your findings...


Cheers
manolito

[manolito]

@clsid

Sorry for my ignorance about Github...
On the first page of this thread I found a link to "nightly test version", and the last commit is this one:
LAVFilters-0.81.0-3.exe

Am I correct that this is your commit? Anyways, I installed it, and all my taskbar problems (disappearing icons) were gone. I would never have guessed that, because I thought that as long as LAV Filters is not used by some software that it would not affect the Taskbar. Now I know better, and this commit made my life a lot easier.


A big Thank You

Cheers
manolito

[clsid]

No whatever problem you had is unrelated to LAV Filters.

[clsid]

@nevcairiel
DVD hardware decoding is broken.
https://drdump.com/Problem.aspx?ProblemID=1011044

Time to finally remove this option? It isn't enabled by default. Any hardware from the past 15 years can decode DVD resolution video without breaking a sweat.
Maybe also ditch quicksync as well.

[Sunspark]

Quicksync has adaptive hardware decoding of interlaced video.

If the code paths aren't broken why remove it? People say it is old, but it seems to work fine.

[Klaus1189]

What is "adaptive hardware decoding". Do you mean deinterlacer or indeed decoding?

[Sunspark]

Both.. it would be used with stuff like television broadcast mostly I imagine, perhaps DVD as well. But, it's not an inverse telecine so for DVD I haven't been using it. I did test the functionality though with a TV clip, and it does deinterlace using hardware (which is awesome when one considers AMD for example pretty much has completely broken deinterlacing functionality).

I use quicksync to this day because I always felt there was something "different" about how colour or motion looked with dxva2-cb. I also use overlay output since I have it. I was told that it's not very likely there's a difference but I am unable to capture it in a screenshot. I just remember a long time ago there was a pipeline graph that shows quicksync processes colour at a different stage of the pipeline than dxva2-cb, so it's not impossible that there is a subtle difference.

I looked it up, quicksync talks directly to the intel video firmware while dxva2 goes through the windows driver stack. I also observe that Intel has a new SDK (OneVPL) which continues to use quicksync and ffmpeg is supporting both the old and new.. so..

I get simplicity, but the decoder isn't something like an old forked version of ffmpeg 2.0. It's just the interaction with the firmware as I understand it.

[clsid]

The Intel driver applies some processing filters when using DXVA2. You can disable that in driver settings.

[clsid]

Got a bug report where a Matroska file contained more than 64 tracks.

So I tried increasing MAX_TRACKS to 80. But things got unstable and freezes. Even got a process stuck and unable to kill. Are more changes required?

I also noticed that in FFmpeg Matroska encoder, MAX_TRACKS is set to 126.

[nevcairiel]

Matroska files in LAV Splitter are limited to 64 tracks. Changing that would require quite some work.

[arapaz]

Hi,

I have a 3d video in a .mkv with a full side-by-side image (3840 x 1980)
The mkv has flags for multi view count and layout.
When played with MPC-BE/LAV/MadVR (3d set to auto), the output is not framepacked sent to the TV, it is the original image.

Is it possible that LAV split the image in 2 views and send that to MadVR as 3d ?

Thnaks