Preview Avisynth Noise Filter Effect in Widows Media Player

[lcymru]

I am really a novice at this. Please bear with me!

I have some very poor quality mosquito-noisy MPEG1 source material that I was hoping to "clean up" a bit via noise filtering and then frameserving for reencoding into MPEG2 so I could play it on a DVD player. I first ran the MPEG1 source through DGIndex to create a "project." I then created an Avisynth script that opens the video .d2v via "mpeg2source." My script also contains some noise filters (I started with undot and deen). There are so many filters, I really just want to experiment with and "preview" their effect without actually reencoding.

I can open my Avisynth script with WMP 9 and see the video. But it is unclear to me whether WMP will also will show the effect of whatever noise filter is in the script. Thus far, I cannot discern any effect of the noise filters when viewed in WMP -- maybe because the source is so bad. I searched for an answer, but cannot find one.

Thanks for your help.

[manono]

Hi-

Yes, if WMP is playing your script, it's playing the entire script. Would you like to confirm that any added filters are working? Is this video in color? If so, add the line:

Greyscale()

at the bottom of the script, save it, and open it in WMP and check to see if it's been turned into black and white.

By the way, Undot does so very little that you're most likely not to notice any effects. Don't know about Deen, but it has some settings you can tweak.

[Nikos]

Try RemoveGrain(mode=2), risk free or
RemoveGrain(mode=17, modeU=2), almost risk free or
RemoveGrain(mode=17), maybe some softness or
RemoveGrain(mode=4), more denoise, no risk free.

More info http://www.removegrain.de.tf/

[lcymru]

Thank you - just what I was looking for. I will try grayscale() to verify, but given your response I assume I did not see any filter effect simply because the filters I tried were too subtle. Given the poor source material, I may well be up against trying to turn a pig's ear into a silk purse.

[lcymru]

Wow, thanks, even more help. I'll give RemoveGrain a try.

[Mr_Odwin]

Because it is mpeg1 you can open the original in one virtualdub window and the avisynth script in a second virtualdub window. You can then do a frame by frame comparison (dragging the bar along the bottom and using the arrow keys to get to a specific frame) to more easily spot the filter effects.