LAV Filters - DirectShow Media Splitter and Decoders

[joe42]

This VC1 clip (from Bleak House) fails to play from MPC-HC when using the LAV Video decoder (also fails with MadVR video decoder). It plays fine with the WMVideo Decoder DMO.

http://www.mediafire.com/?njfncwonawz6pea

[nevcairiel]

Originally Posted by joe42

This VC1 clip (from Bleak House) fails to play from MPC-HC when using the LAV Video decoder (also fails with MadVR video decoder). It plays fine with the WMVideo Decoder DMO.

http://www.mediafire.com/?njfncwonawz6pea

Without looking at the file, i guess its interlaced, and thus not supported.

Edit:
After looking at the file, i'm sure its interlaced.
Use the MS decoder.

[Gser]

I'm curious as to what IDCT LAV video uses to decode MPEG2?

[nevcairiel]

Originally Posted by Gser

I'm curious as to what IDCT LAV video uses to decode MPEG2?

Whatever is ffmpegs default IDCT, something they call "simple IDCT"

[zerowalker]

I can´t play raw x264 files, it just shows a black screen;O
Maybe it´s not supposed to work,. but it said fixed playback in the latest changelog, so sorry if it´s not about that;O

[joe42]

Originally Posted by nevcairiel

Without looking at the file, i guess its interlaced, and thus not supported.

Edit:
After looking at the file, i'm sure its interlaced.
Use the MS decoder.

Do you mean the WMVideo Decoder DMO?

Is there a way to set the LAV decoder to only decode non-interlaced VC-1?

Because otherwise it seems kind of useless to include VC-1 decoding at all, since it messes up the filter preferences.

To clarify, if I put LAV Video decoder at the top of the filter list in MPC-HC, so it gets used for anything it can do, then WMVideo Decoder DMO beneath it in the filter list, is there any way that I can set things up so LAV Video decoder handles non-interlaced VC-1, but it automatically lets WMVideo Decoder DMO handle interlaced VC-1?

[jmone]

No - it is either On or Off for VC-1 decoding & I thought it was off by default in LAVVideo. Another choice is that if you have a nvidia card you can enable CUVID Mode as it handles VC-1(i) perfectly fine. FYI - there were some post a few weeks ago about the addition on VC-1(i) support in libavcodec....

[joe42]

Originally Posted by jmone

FYI - there were some post a few weeks ago about the addition on VC-1(i) support in libavcodec....

Where was this post? I searched this thread and did not see it. Do you mean it was in a libavcodec thread?

[jmone]

Here you go .. no idea if there has been any progress on this code.

Originally Posted by nevcairiel

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.

[chaddawkins]

@nevcairiel or anyone with the knowledge to do this because i don't

this may help with thumbnail shell extension:
http://blogs.msdn.com/b/codefx/archi...l-handler.aspx
http://msdn.microsoft.com/en-us/libr...(v=VS.85).aspx
http://msdn.microsoft.com/en-us/libr...(v=VS.85).aspx

i would give it a go if i knew anything about .NET Framework 4 (C#, VB.NET)
i think this may be what icaros is???

[zerowalker]

Lagarith Playback doesn´t work properly, there is black screen and a big delay, then audio will start but it stays black.

[ruinevil]

Originally Posted by zerowalker

Lagarith Playback doesn´t work properly, there is black screen and a big delay, then audio will start but it stays black.

http://samples.mplayerhq.hu/V-codecs/lagarith/
File takes a second to load, and then goes to end.

Lagarith is a bad lossless codec though. ffmpeg probably doesn't implement it correctly.

edit: http://forum.doom9.org/showthread.php?t=86148&page=7 , I guess it does, sorta.

[nevcairiel]

Originally Posted by joe42

Because otherwise it seems kind of useless to include VC-1 decoding at all, since it messes up the filter preferences.

Thats why VC-1 decoding is off by default.

Originally Posted by zerowalker

Lagarith Playback doesn´t work properly, there is black screen and a big delay, then audio will start but it stays black.

Thats why Lagarith is also off by default.

There have been a few patches for Lagarith the last week or so, which are not yet in LAV Video, and might improve the situation.
However, the speed issue remains, its right now neither SIMD'ed nor multi-threaded. (As i understand, its a intra-only codec, so multi-threading should work pretty easily?)

[zerowalker]

Originally Posted by nevcairiel

Thats why VC-1 decoding is off by default.



Thats why Lagarith is also off by default.

There have been a few patches for Lagarith the last week or so, which are not yet in LAV Video, and might improve the situation.
However, the speed issue remains, its right now neither SIMD'ed nor multi-threaded. (As i understand, its a intra-only codec, so multi-threading should work pretty easily?)

Okay, well let´s hope for the best than;D!

[CruNcher]

Hmm where are the problems with Lagarith i have some recordings from the last version and they so far all work decoding is not as performant as the vfw decoder but @ least watchable, maybe it's more a problem with older streams ?

[El Topo]

Hi Nev,

first: thanks for your work!

Any progress on supporting Intel Graphics HW Acceleration?

[nevcairiel]

Originally Posted by El Topo

Any progress on supporting Intel Graphics HW Acceleration?

That feature has been moved further into the future, alot of other things to do - and honestly, such Intel CPUs that support full hardware decoding are fast enough to decode anything you throw at it anyway - without even breaking a sweat.

[iSeries]

Hi,

I posted this issue in the MadVR thread however Madshi concluded that this is not a MadVR issue but possibly a splitter issue.

The problem I'm having is playback of blu ray via the index.bdmv or the mpls file. Playback is very choppy, with MadVR reporting 100's of dropped frames within minutes. Madshi has concluded that it's a timestamp issue, and that MadVR is receving frames with duplicate timestamps.

The odd thing is though, if I play the m2ts file directly then playback is perfectly smooth.

Would be grateful if someone can help pinpoint where the problem might be?

EDIT: I just tried playback using MPC-HC's internal splitter and playback of index.bdmv and mpls files is absolutely fine, using LAV splitter and I get the issue above.

[nevcairiel]

Here is a test build, with fresh ffmpeg:

http://files.1f0.de/lavf/LAVFilters-...7-g56a1605.zip

Nothing noteworthy in there, just to make sure no regressions appeared - and one build before i start working on stuff that won't be ready for a while.

[nevcairiel]

Originally Posted by iSeries

The problem I'm having is playback of blu ray via the index.bdmv or the mpls file. Playback is very choppy, with MadVR reporting 100's of dropped frames within minutes. Madshi has concluded that it's a timestamp issue, and that MadVR is receving frames with duplicate timestamps.

The odd thing is though, if I play the m2ts file directly then playback is perfectly smooth.

Is that from the disc, or a rip? Possibly remuxed?
Maybe your remuxing tool did a poor job?

I've only ever played BD discs, and i really have no huge interest in testing all BD ripping software out there.

In any case, try with this version:
http://files.1f0.de/lavf/LAVFilters-...1605-debug.zip

Its a special debug version that should leave log files on your desktop. Note that it empties the log everytime its run again, so play it once and save the log somewhere.

Both LAV Splitter and LAV Video logs could be of interest. (If you're not using LAV Video, please try for the sake of getting a log)