ffvdub or ffdshow encoder image processing doesn't work with VirtualDub?

[Milardo]

Yes, I had thought of that after my last post and tried it and it works thanks for your help anyways.

[Milardo]

So I have tried to get the postprocessing filter to work in virtualdub with directshow input driver and i scrubbed the timeline, but I couldn't get it to work. Meaning after encoding I played the video with post processing off/on and it noticed that nothing had changed with the filter off but with the filter on I noticed the difference. The filter was not passed on to encoding process. Am i doing something wrong?

[poisondeathray]

Only post processing? what settings? what about other filters like levels etc... ?

So you're saying the same setting work in MPC preview ? but not in vdub when you scrub? If yes, then you're doing something wrong

[Milardo]

If using ffvdub or ffdshow encoder you can apply most of the image processing filters like noise, sharpen, and so on. However postprocessing (deblocking) doesn't work. I read that it is disabled in ffvdub and the encoder somewhere. It does work in the decoder though. When I scrub the timeline, you can see the postprocessing in effect yes. But whatever encoder I use to actually encode the video, etc., the postprocessing of the decoder wasn't passed on to the encoded file. I viewed it in smplayer for example and the postprocessing effect did not show up. To scrub the timeline, I first open the file with direct show input driver, then I make sure post processing is turned on via the ffdshow decoder icon in the tray, and then drag the button on timeline all the way to the end and then encode, that is right?

[poisondeathray]

Interesting.... I tested deblocking and it worked . I'll test it again on another sample and report back

[poisondeathray]

Yes, I'm 100% sure it works

Can you see the deblocking take effect in vdub?

e.g. try enable deblock before open vdub, open a "blocky" video with directshow input driver , scrub the timeline and it should be visibly changed in input and output pane (both should be deblocked, because the filter occurs before vdub) , it occurs in decoding before it even touches vdub

Have you tried avisynth as suggested? More powerful and controllable deblocking filters

[Milardo]

So you did encode the video, any chance you could send me a sample of the output? For me avisynth is a little too complicated. If i could get the ffdshow to work then it would be great.

[poisondeathray]

Why don't you upload a sample of the video you can't get it working on?

Maybe there's something wrong with it?

[Milardo]

Here is the sample from my other post.

http://www.mediafire.com/?z05aad145cozqbj

Although I have others that i cannot get encoded with postprocessing.

[poisondeathray]

yes it works, but the quality of ffdshow deblock is no good - very low quality, but it's definitely doing something

you will get better quality using avisynth's deblock_qed or custom filters, or the "CSI Deblocker"

here's a few seconds from the clip, using ffdshow deblock at 200% using mplayer algorithm

notice the frames aren't 1:1 either - ie. directshow isn't frame accurate . This is another reason why you should use aviynth


1st - original
2nd - ffdshow deblock
3rd - "CSI" method

[Milardo]

How does this look? It is after I used postprocessing filter of kmplayer fast spp deblocking which is essentially the same as the ffdshow one. If I can't get it to work in virtualdub, I'll have to capture the video in kmplayer I guess.

[Milardo]

I confirmed that if you choose fast spp deblocking in ffdshow and try to pass it to virtualdub while encoding, doesn't work but mplayer deblocking does. However, fast spp deblocking works better than mplayer deblocking mode. So, my current method is to capture video while playing in kmplayer with ffdshow as decoder and fast spp deblocking filter on. Seems to work.

[Milardo]

I just tried another method which is capturing video in kmplayer and using its own fast spp deblocking filter at the same time.