A slow motion bird montage shot with RX10 IV (HFR)

This one is longer than the previous video that I posted here.

The only real issue I'm having is that some of my best focused shots sometimes exhibit serious moire. Anybody have any ideas of how to reduce or eliminate them? Thanks!

TrickLock said:

This one is longer than the previous video that I posted here.

The only real issue I'm having is that some of my best focused shots sometimes exhibit serious moire. Anybody have any ideas of how to reduce or eliminate them? Thanks!

Click to expand...

I assume there was meant to be a link in this message?

oops... yes. Here it is:
And here is an example of the moire problem:

TrickLock said:

oops... yes. Here it is:

And here is an example of the moire problem:

Click to expand...

Certainly very distinctly visible Moire.

TrickLock said:

This one is longer than the previous video that I posted here.

The only real issue I'm having is that some of my best focused shots sometimes exhibit serious moire. Anybody have any ideas of how to reduce or eliminate them? Thanks!

Click to expand...

Beautiful videos!

Did you hide the camera?

miro3 said:

Beautiful videos!

Did you hide the camera?

Click to expand...

Thanks!

I have the RX10 on a tripod in my three season room with a window open and the "stage" is on the deck. The camera is about ten feet away from the birds and I use an ipad to start the recording from my living room. I take a lot of footage.

TrickLock said:

This one is longer than the previous video that I posted here.

Click to expand...

Nice!

TrickLock said:

The only real issue I'm having is that some of my best focused shots sometimes exhibit serious moire. Anybody have any ideas of how to reduce or eliminate them? Thanks!

Click to expand...

I've been filming birds with the RX10 M4 (as well as Canon DSLRs), and moire on fine feather details can be a problem indeed.

I do the following to mitigate this issue:

1. Turn down the sharpness setting of the camera (I use -1 or -2 from default).

2. "Soften" a very sharp lens by either stopping down (diffraction can be a strange friend here), or adding teleconverters on DSLR lenses.

3. Note that on the RX10 M4, HFR shooting will use the following pixel readout, then upres the file into a 1920x1080 footage. I'd reckon that the upres algorithm resizes the height of the image to 1080, then crops the width to 1920 to maintain the correct aspect ratio of objects in the image. Moire which is barely visible at FHD or 4K becomes magnified during the upres.

240 fps - 1824 x 1026 (105% upres)

480 fps - 1824 x 616 (175% upres)

960 fps - 1244 x 420 (257% upres)

Also, if the HFR algorithm uses pixel binning (discarding in-between pixels) rather than resampling to speed up data throughput, moire and stair-stepping become much worse.

Moire notwithstanding, it's a beautiful movie and I enjoyed watching it. Thanks for posting.

TrickLock said:

oops... yes. Here it is:

And here is an example of the moire problem:

Click to expand...

That was Fabulous !
I hope you'll be posting more of these. I enjoyed the video, immensely.

Deborah

TrickLock said:

TrickLock said:

Beautiful videos!

Did you hide the camera?

Click to expand...

Thanks!

I have the RX10 on a tripod in my three season room with a window open and the "stage" is on the deck. The camera is about ten feet away from the birds and I use an ipad to start the recording from my living room. I take a lot of footage.

Click to expand...

Are these videos out of camera, or did you do any post processing, and if so what?

Did you shoot these in 4K?

Which video format did you choose?

Very enjoyable to watch. I love your music selection.

Awesome. Thanks for the tips! I'm going to try those.

miro3 said:

Are these videos out of camera, or did you do any post processing, and if so what?

Click to expand...

I do all my editing in Premier Pro. I usually adjust exposure, highlights, and shadows a little bit, but it's not a raw file, so I'm limited in how much change I can affect without making it look unnatural.

miro3 said:

Did you shoot these in 4K?

Click to expand...

Yes. Then output to 1080. It gives me some flexibility to zoom in when I need to.

miro3 said:

Which video format did you choose?

Click to expand...

H.264 - Premier pro has easy presets for what YouTube likes best.

DJS 531 said:

That was Fabulous !
I hope you'll be posting more of these. I enjoyed the video, immensely.

Deborah

Click to expand...

Thanks Deborah! You're very kind!

Full-song videos take me an absurd amount of time to create, so probably not very often... but I post short clips regularly on my instagram page. :-D

liquidstone said:

I do the following to mitigate this issue:

1. Turn down the sharpness setting of the camera (I use -1 or -2 from default).

Click to expand...

I think that's the in-camera adjustment I'd try. Try using -2 just to see if moire is noticeably reduced or eliminated. If so, then see if -1 is acceptable.

liquidstone said:

Also, if the HFR algorithm uses pixel binning (discarding in-between pixels) rather than resampling to speed up data throughput, moire and stair-stepping become much worse.

Click to expand...

A member of our camera club did some quick calculations on estimated sensor readout speed and concluded they have to be using pixel binning and possibly even line skipping at the fastest HFR speeds. Combine this with upscaling and excessive sharpening and it's not surprising that finely patterned areas are prone to moire. You're advice seems reasonable.

I love it! The movements and the synchronisation with the music is excellent! VERY well done!

I have no idea what moire is, but the videos you posted are amazing.

Enjoyed watching them. Spectacular! Thank you for sharing.