Sky going in reverse

[ericofpendom]

Today I have been playing with different settings for the endOfNight.sh routine to try and understand about resolution, bitrate and FPS. I had completed 5 runs at different settings on the same set of night time images from the 18th Sept when I noticed that the stars were going in reverse. Has anyone any idea as to why this would happen?
I must mention that I had copied the image directory for that day back onto the raspberry pi in /allsky/images/20240918 as would be normal.

[BobW55]

Did you have image flip on? I think older versions had this setting. it is normal for the image left and right (east and west) to be reversed.
depending on how you oriented your camera. If you lay on your back with your head facing North, West will be on your right (like the pictures).

[ericofpendom]

I have checked for flip and it is set to none.

[EricClaeys]

@ericofpendom, can you attach a picture showing the stars and say which way they are rotating?
If you can see Polaris in the northern hemisphere, the stars should rotate around it in a counterclockwise direction.

[stevedee]

I'm also very new to this astro-malarky.

Initially I didn't know which way to orientate the camera, or even what part of the night-sky I was looking at. But when I started to use the excellent program Stellarium, I simply replicated the Stellarium image by pointing the camera towards the northern horizon and double flipping the image in Allsky (i.e. both horiz & vert).

So now I have north in front of me and the west is to my left as shown on my overlay. Star "rotation" is counter clockwise.

BTW: the down sloping line from top to right side (which is broken into 4 pieces) is the ISS.

[BobW55]

Turn the flipping off it is NORMAL to look at the image to have North at the top. South at the bottom. East and West are reversed, West is on the right of the Image and East on the left. As I said earlier, lay down on the ground with your head to the north, you will be viewing the night sky the same way the camera should see it. EAST and WEAT are reversed with LEFT AND RIGHT.

[EricClaeys]

I prefer my North to be at the bottom, as is shown in the shot above. That's how I see the sky when I face North. Allsky supports either way, however.

[ericofpendom]

Thanks Stevedee and bobw55 for your input but I think the issue I was having was caused by the fact that I had copied the folder from a night session to a test rig so that I could mess around with different settings to try and understand the video creation process. It seems that it is possible that the files were not being stitched together in the correct sequence and the stars were going backwards. On the Pi that the live system is on the time lapse video was correct.