Do you need video quality help?

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Melichan923
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Post by Melichan923 » Thu Feb 21, 2008 12:32 pm

Kariudo wrote:generally speaking, deinterlacing/ivtc-ing should be done before you edit your amv (doing so afterwards can throw your sync way off)
Yeah, I couldn't agree more with you on that! :D
dfttest(tbsize=3) #I normally wouldn't use the default sigma level, but it's a decent value for this source
gradfunkmirror(2.4) #does absolute wonders here because it mainly smooths out areas that are supposed to be flat.
I hadn't heard of those two filters before you posted them... but wow, the results they gave are very good. :shock: I have lots to learn about this.
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Kionon
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Post by Kionon » Thu Feb 21, 2008 8:57 pm

LS5 wrote:To be honest, I wouldn't call your filtering an improvement over the source.
Such is your opinion, and I respect it. There are going to be trade offs, and for me, I'd rather have over smoothed source on my HDTV monitor than pixelation even if I do lose detail.
I'll admit you got rid of the blocking fairly well, but at a huge price; the entire frame is filled with hints of stuff that once might have been detail. You mentioned the tiles already, arguably a small detail, but surely you can't call the complete disappearance of the wire running down the table minor?
Actually, I do, yes. Mostly because the scene is so fast in that instance I myself didn't even notice the wire until you pointed it out, and I have the movie! So it's all a matter of what you consider important.
The blocks that appeared on the edge of sharp lines aren't pretty either. Your second screenshot clearly shows the negative effects of your use of (a)WarpSharp: part of the clouds starts to look like water paint and the bat has aliasing issues.
I honestly don't see any of that. Could you post my screenshots with examples circled?
I'd suggest reworking your filter chain to be less destructive, because this is an excellent example of over-filtering. Note that the video in question can indeed be improved by a fair amount without fully destroying details. These 3 filters/scripts already do a decent job without much tweaking.
By all means, join the discussion. I'll certainly see what I can do with your filter grouping. I am certainly far from thee expert on the org. I just saw that no one else was stepping up to attempt to deal with the problem, so I did. I'm well-versed enough to make what I consider improvements in video quality, and I consider this the best I could do considering the source.

Your mileage may vary.
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Mosc
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Post by Mosc » Fri Feb 22, 2008 6:51 am

Kionon wrote:Such is your opinion, and I respect it. There are going to be trade offs, and for me, I'd rather have over smoothed source on my HDTV monitor than pixelation even if I do lose detail.
That's interesting. I disagree with that personally, but why did you increase the resolution to 848x480 if smoothness is your main goal? Upscaling is usually done to accentuate (or even to fake) detail, which seems like the opposite of what you're trying to achieve.
Kionon wrote:Actually, I do, yes. Mostly because the scene is so fast in that instance I myself didn't even notice the wire until you pointed it out, and I have the movie! So it's all a matter of what you consider important.
I see. Again, I disagree, mostly because I don't think it's right to sacrifice entire objects to remove some blocking.
Kionon wrote:I honestly don't see any of that. Could you post my screenshots with examples circled?
Sure:
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Circle a) shows a lack of "depth" that almost make it look like it was made using watercolor painting. It's subtle, but noticeable.
Circle b) shows the aliasing introduced by WarpSharping. Very recognizable after seeing it a few times.
Kionon wrote:By all means, join the discussion. I'll certainly see what I can do with your filter grouping. I am certainly far from thee expert on the org. I just saw that no one else was stepping up to attempt to deal with the problem, so I did. I'm well-versed enough to make what I consider improvements in video quality, and I consider this the best I could do considering the source.

Your mileage may vary.
The initiative itself is great, no criticism there. It's just that I have my doubts about recommending people to smooth their stuff this much because not only is it uncomfortable for me to watch, it's also quite irreversible.

Two more things I'd like to ask:
- What filter chain did you use? Other than WarpSharp, which was easy to identify, I'm clueless.
- You didn't actually tell me what you thought of my try at it. I consider it the best of both the source (detail) and your version (lack of blocking and noise), but I'm interested in what you find wrong with it.

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WesW
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Post by WesW » Thu Feb 28, 2008 2:16 pm

Well, I guess I need some kind of help, either that so some people are out to get me for some reason, based upon the star scores my vids have received.
I spent about half a week trying to understand the Ermac guide, and didn't end up getting much out of it. I think most if it is because I am using Vista and the new WMM, and the rest because I don't know what my problems are, or what problems other people might be having. (I can't get anyone whose downloaded my vids to contact me in any way.)
http://www.animemusicvideos.org/members ... _id=665869
The only problem I am aware of specifically is these thick black lines that occasionally appear during fast motion sequences. Oddly enough, they are more prevalent with the higher-quality DV codec than with WMV.

Any help would be appreciated.

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Kariudo
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Post by Kariudo » Thu Feb 28, 2008 2:46 pm

your video quality seems to be fine (and is actually pretty good for .wmv)
only thing I'm seeing is some left-over interlacing (and a very thin green bar on the right part of the screen at the very end of your GitS SAC video)

the video is a bit grainy/noisy, but that seems to be the .wmv container/format

star scores aren't very accurate (and aren't a good indicator of what is "wrong" or "right" with a video,) so don't let those get you down
I'll leave an op on your vid once I'm done with class/club activities instead of saying things here.
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WesW
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Post by WesW » Thu Feb 28, 2008 4:37 pm

Kariudo wrote:your video quality seems to be fine (and is actually pretty good for .wmv)
only thing I'm seeing is some left-over interlacing (and a very thin green bar on the right part of the screen at the very end of your GitS SAC video)

the video is a bit grainy/noisy, but that seems to be the .wmv container/format

star scores aren't very accurate (and aren't a good indicator of what is "wrong" or "right" with a video,) so don't let those get you down
I'll leave an op on your vid once I'm done with class/club activities instead of saying things here.
Thank you for the words of encouragement. I couldn't figure out what was going on, whether is was the vid or a few people's bias against wmv's or what.

As for interlacing, removing it with my ripper program was the first thing I tried for those lines, but I could not tell that it made any difference after WMM converted the Lagarith to a DV-AVI file.
Do I need to remove it after processing, using vdub or some other converter?

Dwarf
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I need some help!

Post by Dwarf » Thu Mar 06, 2008 8:37 am

Hi!

My question is not directly related to Anime Music Videos but I hope you are willing to help me anyway. I recently entered a competition to create a Trailer for the CW show Supernatural. Now they provided footage to download as either Quicktime or wmv files, however the image quality of these files is quite poor.

Here an example:

Image of the provided material

Image

Images of the edited version:


Image

Image

Needless to say I'm a total newbie when it comes to image quality. Is there a way of improving the image quality of the finished product?

:oops: [/img]

Dwarf
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Post by Dwarf » Thu Mar 06, 2008 8:39 am

Now in case you can't help me with this do you know anyone I could ask. The Trailer must be submitted by tomorrow evening. Thanks in advance :)

Dwarf
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Post by Dwarf » Thu Mar 06, 2008 8:48 am

Sorry to bother you with something not Anime related. I know this site specializes in Animes and live action videos are not wanted, however I didn't know anyone else I could ask. So please excuse the non-AMV related content. I promise my next question will be AMV related (the reason why I joined a-m-v.org in the first place). :oops:

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Pherphq
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Post by Pherphq » Fri Mar 21, 2008 6:34 pm

Really good to suggest this Kionon. I have an issue with DV not sure which to use for viewable quality.I try to use avisynth was'nt sure which filter to use for good quality quite not into avisynth. I mostly use pansonic DV it seems to sometimes show mess up view.Not sure which is a good method for upper quality.

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