why is Videostudio so bad at cropping in on video?

[Longboardluv]

Every time I try cropping into a video, Corel VIdeostudio totally ruins the quality of the image. Lets' go over what I'm doing and try to help me if i'm doing something wrong. This video was shot in 2.7k, so i would think i could crop in without having issue so.......

i'm using the pan and zoom button to crop is. (i hope this is the correct way to do it)

vwlifepanandzoom.PNG (41.8 KiB) Viewed 3816 times

in this shot i want to crop out the car on the far left side. so you can see how i position the box on the part i want to keep.

And the result is that the video just looses almost all sharpness, here is what it looks like. starting at the 4:33 mark when the car is going in slow motion, the image turns to crap,

https://youtu.be/4e0Hfr_V0Og?t=273
[youtube]https://youtu.be/4e0Hfr_V0Og?t=273[/youtube]

but then when i remove the crop at the 4:37 mark the image quality is back to good..
https://youtu.be/4e0Hfr_V0Og?t=277
[youtube]https://youtu.be/4e0Hfr_V0Og?t=277[/youtube]

I mean what gives? 2.7k should be big enough to crop in this much and not destroy the image. I think it's related but when i try to use the color correction in my videos it does the same thing, all the sharpness is destroyed and it looks weird. Has anyone got anything they can add to this? THANKS!

[weaver]

Probably there is a missinterpretation of the crop function. The crop function recalculates the video pixels what was in original 1920x1080 ( in HD). If you crop the video, you use, let us say, just 1700x800 original pixels and it will be zoomed to 1920x1080. This creates the same artifacts as a digital zoom on many cameras ie the original pixles will be just enlarged and deformed. This is what you see on your video. In most cases we use to crop function to reduce the size of the picture (cut out the part) and not to enlarge the small image to full screen.

[theavy]

Maybe this method will give you a better result?

https://www.youtube.com/watch?v=9qoiA7qb3GQ

[Longboardluv]

Maybe this method will give you a better result?

https://www.youtube.com/watch?v=9qoiA7qb3GQ

that seems like a clunky way of doing it.

[lata]

Hi

Play the video I assume the car will go out of screen
If you pan / zoom into the video to remove the car to the left.
Add 2 keyframe a few seconds apart
Keyframe 0 set to zoom in to say 120 and pan to remove car
Keyframe 1 same settings as 0
Keyframes 2 and 3 set back to full screen and full quality

Tip … right click first a keyframe for copy and paste options

What are the original video files properties?
When you render what settings did you use? I assume same as video properties.

To zoom in you could also try Customise Motion, right click clip for Motion / Customise motion.

[Longboardluv]

Hi

Play the video I assume the car will go out of screen
If you pan / zoom into the video to remove the car to the left.
Add 2 keyframe a few seconds apart
Keyframe 0 set to zoom in to say 120 and pan to remove car
Keyframe 1 same settings as 0
Keyframes 2 and 3 set back to full screen and full quality

Tip … right click first a keyframe for copy and paste options

What are the original video files properties?
When you render what settings did you use? I assume same as video properties.

To zoom in you could also try Customise Motion, right click clip for Motion / Customise motion.

that seems like a lot of work and no the car will not go out of screen. i just want to crop into the video and remove the left edge where the following car is in the frame. there is no moving that needs to happen. just a zoom in. it shouldn't be that hard to do.

[canuck]

Can you upload the unedited source video to a site such as googledrive, dropbox etc. from where we can download it? youTube modifies the video when you upload to their site so you don't get the original video.
I downloaded both of your videos and I don't see any sharpness loss near the times you mentioned.


Anytime you "zoom" in on a video and show it full screen you lose quality.. There is no way around this. It all depends on how much quality you are willing to lose.

[weaver]

The easiest and safest way to solve you problem is to cover the left side of the picture. You can use some frame or some other graphics what will hide the car on the picture and the quality remains the same.

[Longboardluv]

The easiest and safest way to solve you problem is to cover the left side of the picture. You can use some frame or some other graphics what will hide the car on the picture and the quality remains the same.

that is a bad way to look at film making. there are times you need to crop it. it's a very powerful tool that everyone should be using.

[Longboardluv]

Can you upload the unedited source video to a site such as googledrive, dropbox etc. from where we can download it? youTube modifies the video when you upload to their site so you don't get the original video.
I downloaded both of your videos and I don't see any sharpness loss near the times you mentioned.


Anytime you "zoom" in on a video and show it full screen you lose quality.. There is no way around this. It all depends on how much quality you are willing to lose.

you can see weird things when you crop it. I understand that there should be some quality loss when you crop in, but this much I would think is too much. And again when i do the color correction option and pick any of the presets, it does the same thing. It seems to make all the edges soft and there are ripple effects on everything, it just looks bad.

It looks bad on the video itself (before going to Youtube), here is the raw unedited clip. if you crop in and export it you'll see what i mean. ...

https://drive.google.com/file/d/1Fiyp5_ ... sp=sharing

[canuck]

The easiest and safest way to solve you problem is to cover the left side of the picture. You can use some frame or some other graphics what will hide the car on the picture and the quality remains the same.

that is a bad way to look at film making. there are times you need to crop it. it's a very powerful tool that everyone should be using.

You are not using "Cropping" but "zooming". They are two different operations. There is no quality loss when cropping (you just get a smaller image with some other background). You always get quality loss when you Zoom

[Longboardluv]

okay i just want to say two things,

first thanks Canuck for point out the difference between cropping and zooming. i did a test and tried both methods here are the results...

https://youtu.be/6LqEWlJ_9KI
[youtube]https://youtu.be/6LqEWlJ_9KI[/youtube]

as you can see the cropping option is way better. You can see how bad the zoom distorts the images.

second. This is a pain in the rear doing it this way. Having to drag the FX onto the clip and then set your key frames seems like a clunky way of doing it. They way you do it in the Pan/Zoom screen is way more intuitive.

The crop in option is a powerful tool for a filmmaker and I can't help but think that Corel needs to improve it it. The more obvious way of doing it with the Pan/Zoom options destroys the quality, while the FX version is hidden and tedious. I would suggest they try something else out..

[weaver]

The easiest and safest way to solve you problem is to cover the left side of the picture. You can use some frame or some other graphics what will hide the car on the picture and the quality remains the same.

that is a bad way to look at film making. there are times you need to crop it. it's a very powerful tool that everyone should be using.

I am quite long in video business but the way how you try to use the crop function is very strange. In this way we could easily upgrade our SD recordings to HD etc, what we know, does not work. It will always create some kind of artifacts what are you claiming here. With different other methods (there are few) to enlarge the size the picture probably you will get other artifacts but the clean lossless upscale never works.
The crop function always means to cut off a part of the picture - ie it will be smaller as it was originally and after that to enlarge to the original size is always coupled with quality reduction.
( in the past it worked in filmindustry as the original was high resulution (ISO,ASA etc just the noise of film was a limit) and a small enlargement was not disturbing on the real filmcopy ( there was also a quality loss).
In the video we work with predefined resolution (SD, HD, UHD etc) ie every enlargement automatically means loss of resolution and creates different artifacts). There is nothing to avoid this.

[tletter]

This is a pain in the rear doing it this way. Having to drag the FX onto the clip and then set your key frames seems like a clunky way of doing it.

Well in VS, FX filters are dragged and dropped onto a clip and then adjusted as required mainly using key frames. While you think this a pain, it does give you alot of control which many users find important.

tletter
https://www.youtube.com/user/tletter

[Longboardluv]

This is a pain in the rear doing it this way. Having to drag the FX onto the clip and then set your key frames seems like a clunky way of doing it.

Well in VS, FX filters are dragged and dropped onto a clip and then adjusted as required mainly using key frames. While you think this a pain, it does give you alot of control which many users find important.

tletter
https://www.youtube.com/user/tletter

there should be an easier way to crop. it shouldn't take like 3 button clicks at most to do it.