ffdshow tryouts project: Discussion & Development

[haruhiko_yamagata]

Whichever ffdshow version is, you shouldn't let ffdshow handle vobsub.

[Sebastiii]

Hi,
I just posted the this report issue but from Nevcairiel, it seems related to ffdshow :

I get a crash in ffmpeg.dll (ffdshow) when LAV Video is in graph with NV12 output checked. I get it on my HTPC Win7 32 bits with my Nvidia GTX460 and only when ffdshow video decoder was as Post Process filter with resize function enable.

I cut a little sample that show up the issue on my HTPC :
(http://dl.dropbox.com/u/10536084/lav/Sample/LesI.avi)

It surely related to ffdshow but if i use another video decoder it didn't crash.
If i keep NV12 + rezise OFF -> no crash.
If i uncheck NV12 + resize ON -> no crash
If i enable NV12 + rezise ON -> it crash

I have test on clean setting from LAV and/or ffdshow.

Thanks.

[Sebastiii]

I have build latest SVN version but i can't get call stack like it crash in ffmpeg.dll.

> ffmpeg.dll!072e7e70()
[Frames below may be incorrect and/or missing, no symbols loaded for ffmpeg.dll]
ffmpeg.dll!07273c76()
ffmpeg.dll!07274e24()
ffmpeg.dll!0727abd7()

[clsid]

I can confirm the crash.

[Sebastiii]

cool thanks

[the6thday]

Originally Posted by Dstruct

Rev4362:

-> open Video Configuration
-> set MPEG2 format to "libavcodec" decoder
-> OK
-> delete the libmpeg2_ff.dll DLL from ffdshow folder

-> open Video Configuration again


Result: "MPEG2" format decoder set to "Disabled".

Expected: "MPEG2" format decoder still set to "libavcodec"!

I can confirm this behavior in rev. 4444.

As soon as i put any file (even an empty txt file) with name "libmpeg2_ff.dll" in the ffdshow folder its correctly set to libavcodec

[clsid]

@the6thday
I have fixed that bug

@Haruhiko
Can you have a look at this bug report:
https://sourceforge.net/tracker/inde...41&atid=867360
It think setting dwControlFlags may give problems with some renderers. LAV Video decoder only sets it when connected to for madVR, since that is the only one that actually uses the info. It also performs a reconnect when the value changes.

[nevcairiel]

As far as i know, at least Haalis Renderer and the Overlay Mixer have issues with the dwControlFlags values.

[vvicked]

Hi,

I'm new to the forum. I just posted a bug report about DXVA decoder crashing when fast forwarding media playing from a network share. Is the problem description adequate? Do I need to provide any additional information to help debug the issue?

http://sourceforge.net/tracker/?func...roup_id=173941

[clsid]

Try mapping the network share to a drive letter.

[clsid]

@haruhiko
There is a small bug with soft telecine detection.
https://sourceforge.net/projects/ffd...3/index/page/1

[TheShadowRunner]

Sorry to re-post about this, but it was completely ignored:
A strange issue, "FFDShow Audio Decoder" refuses to connect to MPCHC's "FLACSource" filter.
FLACSource presents subtype {1541C5C0-CDDF-477D-BC0A-86F8AE7F8354} on its output pin and of course FLAC is set to Libavcodec in FFDshow Audio Dec.

On the other hand, when a FLAC stream is present in a MKV for exemple, it connects to FFDShow Audio Dec without problems using the same subtype {1541C5C0-CDDF-477D-BC0A-86F8AE7F8354}.

Why does FFDShow Audio Dec. refuse to connect to FLACSource specifically?
(LAV Audio Dec. connects and works perfectly fine with FLACSource btw)
Thanks for any info.

[Reino]

Confirmed. Accepts MPC Audio Decoder and LAV Audio Decoder as decoder for FLAC, but doesn't accept FFDShow Audio Decoder somehow.

[clsid]

The problem isn't connection. It fails to decode when connected to that splitter. The problem seems extradata related. It won't be fixed unless someone submits a patch.

[vvicked]

Originally Posted by clsid

Try mapping the network share to a drive letter.

I just tried that and it did not have any effect. I actually did some more testing and the crashing occurs when the "Surface Overlay" option in DXVA is enabled. When I tested the network share media files using DXVA and "Surface Overlay" disabled, there was no crashing. If I disable surface overlay, I lose my subtitles and ffdshow OSD messages. Is there any other way to view subtitles when the ffdshow DXVA decoder is active and surface overlay is disabled?

[wanezhiling]

http://forum.doom9.org/showpost.php?...ostcount=19549
FYI

[RealSnoopyDog]

In the latest builds, the VC1 DXVA decoder does not show embedded subtitles anymore. H.264 DXVA does. I went back all the builds i found on my HD: in build 4257 (15.01.2012) it's still working, in (e.g.) 4436 (22.04.2012) it does not work.

[clsid]

VC1 DXVA + subs got broken somewhere between r4257 and r4291. If someone pinpoints the exact revision, then maybe it can get fixed. But otherwise don't expect a fix anytime soon. There are no developers that are actively working on ffdshow.

[RealSnoopyDog]

Hm in your builds list, i only find these two 4257 and 4291. You need it more accurate (?)

[ryrynz]

@RealSnoopyDog

http://www.xvidvideo.ru/ffdshow-tryo...ranitsa-3.html

That should help you pinpoint it.