Misbehaving Camera/Recorder Mini-2

[Chaosrider]

Sometimes when I'm filming, the view on the screen goes a little whacko. I'll get these weird fingerprint patterns, frequently with blue spots. They seem to attach to a particular part of the image, and if I rotate the drone, they go away.

Any idea what causes this? I thought I might have a slow SD card, so I put in one of the cards that DJI specifically recommends, but it didn't help.

Thoughts?

Thx,

TCS

 

[teccer]

Sometimes when I'm filming, the view on the screen goes a little whacko. I'll get these weird fingerprint patterns, frequently with blue spots. They seem to attach to a particular part of the image, and if I rotate the drone, they go away.

Any idea what causes this? I thought I might have a slow SD card, so I put in one of the cards that DJI specifically recommends, but it didn't help.

Thoughts?

Thx,

TCS

often when filming roof tops with tiles you get a strange pattern showing but this is normal

 

[Dale D]

often when filming roof tops with tiles you get a strange pattern showing but this is normal

Try Googling the term "Moire Effect."
Moiré effect is a visual perception that occurs when viewing a set of lines or dots that is superimposed on another set of lines or dots, where the sets differ in relative size, angle, or spacing.

 

[Chaosrider]

often when filming roof tops with tiles you get a strange pattern showing but this is normal

In my case it's tree tops, rather than rooftops.

TCS

 

[Chaosrider]

Try Googling the term "Moire Effect."
Moiré effect is a visual perception that occurs when viewing a set of lines or dots that is superimposed on another set of lines or dots, where the sets differ in relative size, angle, or spacing.

Yup, that's it alright.

Is there any way to prevent it, or get rid of it?

Thx,

TCS

 

[Dale D]

Yup, that's it alright.

Is there any way to prevent it, or get rid of it?

Thx,

TCS

This is only a guess but I think if you change the angle of the light you might be able to avoid it. Try flying and photographing from different viewpoints and edit out the offending clips. I highly doubt you can get rid of it without some very fancy After Effects editing, which is far beyond my skill set.

 

[Chaosrider]

This is only a guess but I think if you change the angle of the light you might be able to avoid it. Try flying and photographing from different viewpoints and edit out the offending clips. I highly doubt you can get rid of it without some very fancy After Effects editing, which is far beyond my skill set.

Good thought, I'll give that a shot.

I've vaguely noticed that it does have something to do with sun angle, but I haven't done any actual tests.

Thx!

TCS

 

[Dale D]

Good thought, I'll give that a shot.

I've vaguely noticed that it does have something to do with sun angle, but I haven't done any actual tests.

Thx!

TCS

If it were me I would try flying perpendicular to the sun- not at the sun (glare, moire effect) or away from the sun(shadows)

 

[Chaosrider]

If it were me I would try flying perpendicular to the sun- not at the sun (glare, moire effect) or away from the sun(shadows)

Initially, I'm just going pay more attention to when it happens, now that I know that sun angle could be a factor.

Thx,

TCS

 

[Dale D]

Initially, I'm just going pay more attention to when it happens, now that I know that sun angle could be a factor.

Thx,

TCS

I would also turn on your zebras (over-exposure indicator in the settings) and histogram, trying to keep the curves within the limits, especially on the right side, where you could blow out the highlights.

 

[Chaosrider]

I would also turn on your zebras (over-exposure indicator in the settings) and histogram, trying to keep the curves within the limits, especially on the right side, where you could blow out the highlights.

I have no idea what this means, but it sounds like a good idea!

;-)

This is one of the areas of the SW that I haven't even looked at yet.

Thx,

TCS

 

[Dale D]

I have no idea what this means, but it sounds like a good idea!

;-)

This is one of the areas of the SW that I haven't even looked at yet.

Thx,

TCS

Here is what it means- see the two attachments. Go to the camera settings and turn on the over -exposure warning button and it will show zebra lines where the image is over exposed. See how the histogram is shifted to the right where you cannot recover details in the highlights with over exposure.

Please tell me you understand this.
Dale

 

[Chaosrider]

Here is what it means- see the two attachments. Go to the camera settings and turn on the over -exposure warning button and it will show zebra lines where the image is over exposed. See how the histogram is shifted to the right where you cannot recover details in the highlights with over exposure.

Please tell me you understand this.
Dale
View attachment 131579View attachment 131580

Well, I understand it now!

I'm not quite sure what to do with this information, however.

I've taken a lot of pictures in my life, 14000 at last count, all digitized. But I've never gotten into anything like this kind of detail. I've always been a point-and-shoot kinda guy, and my results got better as the automatic cameras that I got, got better.

What control inputs are there to address the situation?

Thx!



TCS

 

[Dale D]

Well, I understand it now!

I'm not quite sure what to do with this information, however.

I've taken a lot of pictures in my life, 14000 at last count, all digitized. But I've never gotten into anything like this kind of detail. I've always been a point-and-shoot kinda guy, and my results got better as the automatic cameras that I got, got better.

What control inputs are there to address the situation?

Thx!



TCS

I have no idea how many pictures I've taken, but I am 82 and have been really into photography since 8 years old, riding the train all the way from darkrooms and developing solutions, Kodachrome slides, and slide shows to digital and video, video editing, timelapse, and drones. It's been a wild ride. I decided to get off the merry go round by not buying a mirrorless camera, which I now regret, but at the age of 82, it would be just one more thing for my wife to try to sell (although I am in good health).

So to answer your question....I would say you are probably concentrating more on still images taken with the drone, rather than video. each has its own learning curve, and settings. For mostly all images, you can go totally to automated settings. But if you want to be more creative, you will have to learn more about the photo settings that are available for your type of drone. For example, with the Mavic 2 Pro you can control the aperture but the the mini 2 you cannot.

I would advise watching a lot of You Tubes on the subjects you are interested in. Every day I spend a few moments doing that and I learn every day.

 

[Chaosrider]

I have no idea how many pictures I've taken, but I am 82 and have been really into photography since 8 years old, riding the train all the way from darkrooms and developing solutions, Kodachrome slides, and slide shows to digital and video, video editing, timelapse, and drones. It's been a wild ride. I decided to get off the merry go round by not buying a mirrorless camera, which I now regret, but at the age of 82, it would be just one more thing for my wife to try to sell (although I am in good health).

So to answer your question....I would say you are probably concentrating more on still images taken with the drone, rather than video. each has its own learning curve, and settings. For mostly all images, you can go totally to automated settings. But if you want to be more creative, you will have to learn more about the photo settings that are available for your type of drone. For example, with the Mavic 2 Pro you can control the aperture but the the mini 2 you cannot.

I would advise watching a lot of You Tubes on the subjects you are interested in. Every day I spend a few moments doing that and I learn every day.

Good information!

I haven't intentionally taken any stills yet, but in my early days (about a month ago!) I fat-fingered a couple of them into existence.

Sadly in this respect, I do have a full-time job, so I need to prioritize what I'm going to do with my spare time!

I did check out my YouTube account, which I didn't know that I had, and did the small amount of set-up stuff required. I've got my first video uploading now. I'll post the link here when it's done.

Thx!

TCS

 

[Dale D]

Good information!

I haven't intentionally taken any stills yet, but in my early days (about a month ago!) I fat-fingered a couple of them into existence.

Sadly in this respect, I do have a full-time job, so I need to prioritize what I'm going to do with my spare time!

I did check out my YouTube account, which I didn't know that I had, and did the small amount of set-up stuff required. I've got my first video uploading now. I'll post the link here when it's done.

Thx!

TCS

Since you are in the learning phase, I feel it is not insulting to advise the following; with You Tube, it is best to upload 4K videos for clarity because You Tube will compress your videos downward. I have seen 360 and 720 p which look awful. If you're watching a video on You Tube. please remember to first go immediately to the little cog-wheel icon on the lower right side in red, left click it, and get the drop up menu and select the highest resolution available. For those of us who upload 4K, it will show 2160 which will give you the best video.

You will soon learn that almost nobody watches a video longer than 3-5 minutes. My actual statistics which I get weekly from my Vimeo account, less than 50% will finish my video. If you want more freedom from You Tube ads, get a free Vimeo account which allows 5 GB a month. I did that for about 2 years, then went to the lowest pay plan which gives 20GB per month. Vimeo gives me better resolution and no ads.

Here is my Vimeo account. Dale Davis,M.D.

 

[Chaosrider]

Since you are in the learning phase, I feel it is not insulting to advise the following; with You Tube, it is best to upload 4K videos for clarity because You Tube will compress your videos downward. I have seen 360 and 720 p which look awful. If you're watching a video on You Tube. please remember to first go immediately to the little cog-wheel icon on the lower right side in red, left click it, and get the drop up menu and select the highest resolution available. For those of us who upload 4K, it will show 2160 which will give you the best video.

You will soon learn that almost nobody watches a video longer than 3-5 minutes. My actual statistics which I get weekly from my Vimeo account, less than 50% will finish my video. If you want more freedom from You Tube ads, get a free Vimeo account which allows 5 GB a month. I did that for about 2 years, then went to the lowest pay plan which gives 20GB per month. Vimeo gives me better resolution and no ads.

Here is my Vimeo account. Dale Davis,M.D.

No insult taken, advice appreciated!

I completely believe that 3-5 minutes is all that can be reasonably expected from a viewer. Now, I'm in search of a video editor, one where the basic things...cut and paste...are stone simple and obvious to do.

Getting rid of YouTube ads is a truly noble quest. I've seen a lot of ads for Vimeo recently (The Machine knows all, and sees all). Based on your recommendation, I'll go check it out!

Probably not until the weekend, though. I'm a regular working stiff during the week.

Thx!!

TCS