TTempsmooth Help Needed

[VideoFanatic]

Whatever you want to call it. It's an artefact that wasn't there until TTempSmooth was used. If you look at the black backround by the time the guy hits the turnbuckle - the picture is clear. But in the 1st half of the video you can see the artefacts. They're minor but they are there.

[jagabo]

GOD DAMN IT. Show what artifacts you are talking about!!! I tired of trying to guess what you mean.

[sanlyn]

The block noise is most apparent in the blackish/gray background, but it's really everywhere in the clip. Poor encoding. Expand your image and get an eyeful of the junk and compression artifacts along the length of the red ropes; it's worse.

[VideoFanatic]

I tried loading the script in VirtuaDubMod but it gives an error message. Anyway it's Frame 274 for example where you see the artefacts.

[sanlyn]

Left-of-center has a batch of block noise that stays exactly in the same place in frames 273, 274, and 275, even though the camera's moving in the video. It occurs hundeds of times in this clip. However, you should be aware by now that the noise (streaks, clouds, floating detritus, grain, macroblocks, mosquitos, etc.) in the original mpg is far worse, and is easier to see. But the original is less "blocky" -- the blocky noise you see in "groups" of fields and frames in the processed clip is due to poor encoding, not to filters. I know of filters that "reveal" block noise, but they don't "create" them. The blocks occur along motion lines and in areas where there should be fine gradation between colors or contrasting objects. Take a loook at the same 3 frames in your original mpg: even more macroblocks, bad interlacing, and what have you. It looks much worse than the processed clip.

[sanlyn]

DOesn't MCTemporalDenoise have a deblock parameter? I don't think it's activated by default, but I read where a setting of "medium" kicks it in. I'll look into that.

[VideoFanatic]

Please don't. It's useless to me as it takes over 24 hours.

[jagabo]

I tried loading the script in VirtuaDubMod but it gives an error message. Anyway it's Frame 274 for example where you see the artefacts.

Why do I have to guess which video you're talking about?

[VideoFanatic]

Here

[jagabo]

This is frame 274 with no filtering (not even "CPU=6") with the two fields stacked vertically instead if interlaced:



It's full of blocky artifacts.

Here it is after filtering with your script:

Mpeg2Source("704 x 480 =June 30 1997 before avisynth.d2v", CPU=6)
AssumeTFF()

DeGrainMedian(limitY=2, limitUV=3, mode=1, interlaced=true)
DeGrainMedian(limitY=2, limitUV=3, mode=1, interlaced=true)
ttempsmooth(maxr=3, lthresh=8, cthresh=5, strength=4, interlaced=true)
AddBorders(8, 0, 8, 0)

SeparateFields()
StackVertical(SelectEven(), SelectOdd())

Where are the blocky artifacts you're talking about?

[VideoFanatic]

Very strange, I loaded the script in VirtualDub and you're right there are no artefacts yet if I load it in AvsPmod then I do see the artefacts. So the artefacts only appear in the M2V file. I muxed it to MPEG2 here (it's the same clip you saw before where you said you coudn't see the artefacts.

I encode at 9000 bit rate with HC Encoder and it's only when I use ttempsmooth that I see the artefacts. If I were to reprocess the file again with CPU=6 then it gets rid of those artefacts but isn't there any way to prevent them appearing the first place?

[jagabo]

Very strange, I loaded the script in VirtualDub and you're right there are no artefacts yet if I load it in AvsPmod then I do see the artefacts.

I don't know what's going on with Avspmod. I don't really use it.

So the artefacts only appear in the M2V file. I muxed it to MPEG2 here (it's the same clip you saw before where you said you coudn't see the artefacts.

I never said I couldn't see blocking artifacts in your MPEG 2 file. I even posted pictures of some of them here:

https://forum.videohelp.com/threads/341320-TTempsmooth-Help-Needed?p=2125207&viewfull=1#post2125207

I encode at 9000 bit rate with HC Encoder and it's only when I use ttempsmooth that I see the artefacts.

Because 9000 kbps isn't sufficient for that video.

<edit>
I just tried the script with Avspmod. The image looks the same as the one I posted.
</edit>

[sanlyn]

400# blowup of frame 274 (top field, upper left corner):

Original:


[Attachment 9951 - Click to enlarge]

Filtered with DeGrainMedian script, quoted above): Looks 400% cleaner to me.


[Attachment 9952 - Click to enlarge]

[poisondeathray]

Very strange, I loaded the script in VirtualDub and you're right there are no artefacts yet if I load it in AvsPmod then I do see the artefacts.

disable directx in vdub

options => preferences => display => uncheckmark use direct x for display panes

as mentioned earlier, all your videos have suboptimal levels

I suspect some or all of your montior, graphics card, capture setup, tv settings need adjusting