LAV Filters - DirectShow Media Splitter and Decoders

[nevcairiel]

Originally Posted by BatKnight

I don't know if this helps you, but please test a few MKV movies with AC3 and with ffdshow's jitter correction disabled, to see if you can reproduce it.

So, this worked.
I could reproduce the issue perfectly.

I also encountered some other issues, like, with jitter correction off, i dont get audio from some AAC tracks.

Is there any reason you have this off anyway? =)

The memory leak is obviously in ffdshow somewhere, but i'll go and see if i can make it play nice again from my side now.

[nevcairiel]

So i tried fixing this.
I didn't find any way to do this, that wouldn't break other files again. The change that originally broke this was a rather significant bug fix. :/
This is one of the drawbacks trying to be a multi-format splitter, every format has its quirks, and i guess this might be one of those cases. (Or its just a bug in ffdshow)

I would suggest bringing this up with ffdshow, maybe they can fix it. Or just turning on the option =)
The fact that it only breaks with ffdshow, and only when that option is turned off, does make me think that its something on their side.
In addition, you're like the only one reporting the problem, so i figure, not many people turn off the option.

I'll keep looking into it for a while, maybe i'll come up with a brilliant solution, but i really strongly suggest to talk to a ffdshow developer, or get one to contact me that is willing to fix this.

[Ger]

Originally Posted by nevcairiel

Good news everyone!

ffmpeg added support for AAC LATM, and i went ahead and fixed it in LAVFSplitter right away.
I don't think ffdshow can play it yet, but i do get proper sound with the MONOGRAM AAC Decoder.

This makes this the only splitter that can play AAC LATM in MPEG-TS, as far as i know, anyway.

Great news.

[Sebastiii]

Thanks Nevcairiel for all work you do

[nevcairiel]

LAVFSplitter 0.11
- Smart stream pre-selection based on language, flags and quality
- Properties page for configuration (languages, stream selection logic)
- Added support for AAC LATM (single stream)
- Changed the "No Subtitles" pin to a more "friendly" Media Type
- Fixed a crash with certain AAC tracks

Download: 32-bit & 64-bit

Like mentioned earlier, i only got AAC LATM to work with the MONOGRAM AAC Decoder. If you know for a fact that another decoder out there supports AAC LATM, and LAVFSplitter does not work with it, please say so.

Stream selection!
Its finally finished. First, you will need to re-register the splitter for the properties page to show up, or you will not be able to configure it.

Some implementation details.
First, check language codes.
If none or more then one matched, check the "default" flag.
If no "default" flag is found, pick the stream with the highest quality (quality for audio is only based on number of channels and codec. More channels = more good; losless formats (TrueHD, flac, PCM) > DTS > AC3/AAC > *)

Subtitles have no quality check, they do however have some extra logic for forced streams in there. According to the MKV spec, forced streams should always play, so i might add an option later to create a always-on pin for those, instead of putting them on the normal subtitle pin.

Note that the default and forced flags are not really set in many containers, in fact, i only know that MKV has them, not sure about any others.
Anyway, i'm sure the logic might need tweaking on some edges, so please report your expierence!

PS:
The problem with some files not starting to play and eating up memory is still there. We were able to pin point the issue to AC3 audio tracks, in conjunction with ffdshow, but only when the Jitter Correction option in ffdshow was off (default is on). So if some files are not starting for you, turn that option in ffdshow on!

[Jeffster]

Hi Nevcairiel,

First thanks for releasing a new version so quickly with AAC LATM audio support.

I tried playing some .ts capture files in MPC-HC and they worked OK, including the audio (using the monogram AAC decoder), which is a first!

It's not all good news though. I noticed while checking which filters were being used and the filter properties, in the Pin Info for the video decoder it said 50 fps (should be 25 fps). I thought that was odd but didn't think much more of it initially because the file played normally and checking the ffdshow properties while playing it said Movie FPS: 25.000.

But when I opened the .ts file via AviSynth using DirectShowSource and looked at the File Info it said 50 fps and the video portion played at twice normal speed.

Anyway I suspect the LATM/HE-AAC audio may somehow be the reason for the movie fps confusion because if I demux the .ts file and remux the video (H264) with a "regular" AAC file or an MP3 instead then the video fps is reported correctly as 25 fps.

[v0lt]

LAVFSplitter 0.11 crashes on some matroska files.
sample

[nevcairiel]

Originally Posted by v0lt

LAVFSplitter 0.11 crashes on some matroska files.
sample

No it doesn't. Works fine here.

The file comes with AAC audio. There was a crash in there before. Completly recompile your ffmpeg, if you're using a custom build, or use my build.
Unless its the same issue as detailed at the end of the post with no configured languages.

Originally Posted by Jeffster

But when I opened the .ts file via AviSynth using DirectShowSource and looked at the File Info it said 50 fps and the video portion played at twice normal speed.

I actually saw that with one of my samples as well. I didn't try in AviSynth though, so i didn't see it breaking.
Initially i suspected it was because the file was interlaced (50fps interlaced, gives 25 fps progressive), i'll investigate some.


I was also notified about a crash which happens when you do not configure any languages, and open a file with subtitles.
I fixed this internally, but until i push out a new version later today, hopefully, just set a language.

[v0lt]

Originally Posted by nevcairiel

Completly recompile your ffmpeg, if you're using a custom build, or use my build.

I used your library from the LAVFSplitter-0.11.zip

MPC-HC 1.4.2714.0 (MSVC 2008 SP1), Win7 x86.

[nevcairiel]

I guess then it is the subtitle thing i talked about. Configure some languages and turn on "only matching", or set subtitle mode to "No Subtitles" temporarily. I'll release a new version soon.

[v0lt]

Yes, the problem is due to the subtitles.

[Jeffster]

Originally Posted by nevcairiel

I actually saw that with one of my samples as well. I didn't try in AviSynth though, so i didn't see it breaking.
Initially i suspected it was because the file was interlaced (50fps interlaced, gives 25 fps progressive), i'll investigate some.

Thanks, they're just regular 25 fps interlaced... I know what you mean though, a couple of stations used to broadcast in 720p @ 50 fps but they don't any more.

It seems I spoke too soon unfortunately. I've had a chance to test some more .ts files now and found that some of them can't connect to an audio filter.

The only difference I can see is the files that work are all SD files (576i) and the files that don't work are HD files (1080i) but I can't imagine why that would make a difference. Here's a sample of one that doesn't work if you want to try it.

[Ger]

More LATM feedback:

My recordings from Norwegian DVB-T play fine with LAVFSplitter 0.11 and Monogram AAC decoder. Both SD and HD samples tested (only stereo so far).

However, the 5.1 track in this sample from Danish DVB-T has a lot of noise. The stereo track in the same sample sounds OK though. I use "Mix to stereo" in the Monogram settings.

The stereo and 5.1 tracks both sound fine in DVBViewer + Monogram AAC decoder (same mix to stereo setting).

[BelowSky]

Please nevcairiel, use InnoSetup with your files. It will makes end users' life a whole lot easier.
xhmikosr has it, but he is not always up-to-date.
http://xhmikosr.1f0.de/index.php

Thank you.

[nevcairiel]

Unzipping and hitting install.bat is so complicated? Really?

[hoborg]

Some 0.11 issues: (tested in Graphstudio using FFDShow)

This sample will crash Graphstudio (not sure if extension should be .avi or .divx)

This FLAC sample wont play - graph is created correctly, but playback wont start

This FLV sample is playing at wrong speed

This MPG sample have coruptions on begining
This MPG sample wont play (gray screen)

[andyvt]

Originally Posted by nevcairiel

Unzipping and hitting install.bat is so complicated? Really?

Getting the correct VC++ runtime installed can be complicated over the life of a project as different versions get released. If you use a setup project in VS, the additional effort is minimal and it can package the right runtime in the MSI and register the filter.

[BelowSky]

Originally Posted by nevcairiel

Unzipping and hitting install.bat is so complicated? Really?

Yes it is
Delete LAVFSplitter old folder.
Open new LAVFSplitter.zip with Winzip.
Extract and then go the extracted folder.
Run install.bat.......ERROR....... What?
Search the internet for that error, ReadMe.... etc
OK, I get it, I need to run it privileged mode.
Oh, another error... What now?
Again, search the internet for that error, ReadMe.... etc
OK, it needs VC++v10 runtimes. Do I have them installed?
Check Add/Remove manager... No nothing like that in there.
Search the Internet for that runtime.

Compare that with InnoSetup:
LAVFSplitterSetup -> Next -> Next -> Done.

which translates to:
Autorun in privileged mode -> auto download and install VC++v10 runtimes when not there -> Just update LAVFSplitter if it already installed. -> Done

[nevcairiel]

Originally Posted by hoborg

This MPG sample have coruptions on begining
This MPG sample wont play (gray screen)

The issue only seems to happen with ffdshow in libavcodec mode for MPEG1/2. Switch it to libmpeg2 or use the MPC-HC internal filters, and it works flawlessly.

I'll try to fix it anyway.

[hoborg]

Originally Posted by nevcairiel

The issue only seems to happen with ffdshow in libavcodec mode for MPEG1/2. Switch it to libmpeg2 or use the MPC-HC internal filters, and it works flawlessly.

I'll try to fix it anyway.

You are right, thanks.

EDIT:

If i try to seek with libmpeg2, MPC-HC/Graphstudio will crash/freeze :/
Libavcodec are working fine, no freeze durning seek.