Squirrel and software tool discussion

johnrmoyer — Mon, 01 Jun 2026 11:07:46 GMT

Fox Squirrel (Sciurus niger) in Norman, Oklahoma, United States on May 11, 2026

Some of the camera settings I used to make this photo are at:

https://www.rsok.com/~jrm/2026May31_birds_and_cats/IMG_5904c_2026may11_squirrel.html

Software tools that I used include Canon DPP on iMac, exiftool free software on both iMac and Debian Linux, GraphicsMagick and jpegli on Debian. I saved a 16 bit TIFF from DPP so that I would have more color information to work with. I used graphicsmagick to reduce the image size for viewing on screens and to add the frame and caption. I sometimes use rawtherapee free software, but Canon DPP has the advantages of better understanding the camera settings I used, availability of "digital lens optimizer", and DPRAW processing tool. DPP could be improved by using jpegli when saving JPG files. GraphicsMagick offers a choice of several algorithms for resizing an image. I use the WayBackMachine to make an archive copy of the web pages I write so that they might still exist when my web server is gone. https://web.archive.org/web/20260601110441/https://www.rsok.com/~jrm/2026May31_birds_and_cats/IMG_5904c_2026may11_squirrel.html

Fox Squirrel (Sciurus niger) in Norman, Oklahoma, United States on May 11, 2026

There is also a video made from the still photo zooming in to the eye of the squirrel.

https://www.rsok.com/~jrm/2026May31_birds_and_cats/video_IMG_5904c2.mp4

This has sometimes been called the "Ken Burns effect", although he was not the first to use it.

https://en.wikipedia.org/wiki/Ken_Burns_effect.

Camera Model Name	Canon EOS R5
Lens Model	EF100-400mm f/4.5-5.6L IS II USM +2x III
Focal Length	800 mm
Exposure Time	1/400
ISO	6400
F Number	11.0
Camera Temperature	37 C
Measured EV	9.62
Measured EV 2	13
Focus Distance Upper	12.51 m
Focus Distance Lower	10.56 m

ExifToolVersion	13.25
FileName	IMG_5904.dr4
WorkColorSpace	sRGB
WhiteBalanceAdj	Shade
PictureStyle	Shot Settings
ContrastAdj	0
ColorToneAdj	0
ColorSaturationAdj	1
UnsharpMaskStrength	2
UnsharpMaskFineness	7
UnsharpMaskThreshold	5
LuminanceNoiseReduction	5
ChrominanceNoiseReduction	5
DLOSetting	35
GammaBlackPoint	+0.000
GammaWhitePoint	+0.750
GammaMidPoint	+0.000
GammaCurveOutputRange	0 16383
DPRAWMicroadjustBackFront	0
DPRAWMicroadjustStrength	8
CropAspectRatio	3:2
CropAspectRatioCustom	1.5 1
CropActive	Yes
CropRotatedOriginalWidth	8192
CropRotatedOriginalHeight	5464
CropX	533
CropY	637
CropWidth	7200
CropHeight	4800
CropRotation	0
CropAngle	0
CropOriginalWidth	8192
CropOriginalHeight	5464

ffmpeg -loop 1 -i IMG_5904c2.JPG  -y -filter_complex "[0]scale=1200:-2,setsar=1:1[out];[out]crop=1200:800[out];[out]scale=8000:-1,zoompan=z='zoom+0.010':x=iw/2.67857-(iw/zoom/2):y=ih/3.2587-(ih/zoom/2):d=3000:s=1200x800:fps=30[out]" -c:v libx265 -crf 28 -preset slow -tag:v hvc1 -map "[out]" -map 0:a? -pix_fmt yuv422p -r 30000/1001 -t 30 video_IMG_5904c2.mp4

#squirrel #wildlife #wildlifephotography #Debian #ffmpeg #GraphicsMagick #jpegli

Re: Squirrel and software tool discussion

LeeP — Mon, 01 Jun 2026 23:56:28 GMT

Before and after images would be interesting to see in the thread.

Re: Squirrel and software tool discussion

johnrmoyer — Tue, 02 Jun 2026 10:59:27 GMT

I might not understand what you are asking for, straight out of camera compared to final edited photo?

Image saved by DPP compared to one created by jpegli?

Straight out of camera compared to image saved by DPP?

I linked to some such comparisons in a previous post and the details are at:

https://www.rsok.com/~jrm/2026Apr30_birds_and_cats/IMG_5771c_2026apr03_titmouse.html where I have links to SOOC image, DPP JPG, and jpegli JPG and a JPG showing the result of subtracting one image from the other (the difference).

What was new in this post is the video with the "Ken Burns effect" and the ffmpeg command line used to make it.

There is a video made from the still photo zooming in to the eye of the squirrel. https://www.rsok.com/~jrm/2026May31_birds_and_cats/video_IMG_5904c2.mp4.

SOOC JPG: https://www.rsok.com/~jrm/2026May31_birds_and_cats/IMG_5904.JPG

DPP JPG:

https://www.rsok.com/~jrm/2026May31_birds_and_cats/IMG_5904c.JPG

DPP TIF: https://www.rsok.com/~jrm/2026May31_birds_and_cats/IMG_5904c.TIF

jpegli JPG: https://www.rsok.com/~jrm/2026May31_birds_and_cats/IMG_5904c2.JPG

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