Artifacts in a clip. Please have a look!

[Bouke Vahl]

I suspect the fast motion to be the problem.
A ‘good’ de-interlacer tries only to de-interlace when it is needed, leaving static shots intact.

You could use a brute blend option to force everything to be de-interlaced, but you end up with a way blurry end result.

If you can’t trust the de-interlacing option in software DVD players,
i would suggest trying every package you can get your hands on…

Bouke

https://www.videotoolshed.com/
smart tools for video pros

[Mark Maness]

I see a couple of things here.

First, your footage is interlaced and is a CU of a driver coming out of a curve. This is too much for interlaced footage to handle. A wider shot would not have been as noticeable for this. Any artifacts that are on the raw footage, I’d have to suspect that the camera is having some problems that need to be looked at by a repair shop. While you said it was shot Digibeta, the footage should have looked more pristine than I am seeing.

Usually artifacting is due to heavy compression methods. Digibeta is an excellent SD medium and should have looked much better than you are saying. The Quicktime you made for us is interlaced, just as your footage, but Quicktimes should be deinterlaced because computer monitors are not interlaced themselves. So any Quicktimes that are interlaced will look awful on them.

To remove artifacts on raw footage requires hard work and patience to remove them. There are plugins that will help but if the artifacts are bad enough, frame by frame manipulation is the only way. Or if you can, pick a different shot that looks better. Maybe a different angle or totally different shot.

_______________________________

Wayne Carey
Schazam Productions
https://web.mac.com/schazamproductions
schazamproductions@mac.com

[Andy Carroll]

Question: Are you using Apple Compressor?

I had an issue with this not too long ago while making a basketball demo, and there are a few options in Compressor that can fix the issue.

Mac Pro – Mac OS X 10.5.8 – 2 x 3 GHz Quad-core Intel Xeon – 6 GB ram – 6 TB Raid Array
MacBook Pro – Mac OS X 10.6.4 – 2.8ghz Core 2 Duo – 4gb 1067mhz DDR3

[Sven Giebel]

Yes, I’m using Compressor for most of my encodings but what do you mean by saying there are some options which could possibly fix this issue?
sven

[Sven Giebel]

thanks wayne,
the clip I posted is taken from the timeline, which is interlaced ProRes, upper field. This clip is already graded and I put some sort of bleach bypass effect on it. Part of the effect is a gaussian blur I put on a copy of the layer I put on top of itself, then I used a composite mode etc. As I mentioned the original unaltered clip shows the same artifacts. Without the effect its pristine and it’s sharp. What I should have mentioned: the stills are taken from the dvd, magnified by two. I don’t want to use another clip because these about 30 frames are part of a pictural climax which leads towards
the driver crossing the finishing line.
Your hint concerning a possibly necessary check of the camera is something I will think about, at least I will talk about it with the technician who regularly checks our euipment(although: in aprox. two years there were only two clips in which I’ve seen these problems and the clips were pretty similar (very blurry, very fast moving things)
thanks for your thoughts,
sven