Hello, I am looking for some help understanding a problem that I am having with a very simple animation (video sequence). I have a project that has a high poly count, large scene. But the animation is a simple rotation around an object. I am using a camera that is parented to an empty in the center of the object. It rotates 180 degrees around the object in 330 frames (24 fps). No scaling, and only rotating on the z axis. I am capturing a PNG file for each frame, and then putting them together in the sequencer. I am running Blender 3.5.
I have done this many times over the last 9 months without incident. But with this animation, when I sequence it, it is very jittery and looks like the camera is bouncing forward and backward as it rotates around the object. I played with every setting in Blender and cannot resolve it. I finally built the scene linked here as a test and gave the objects some geometry. I set the camera up the same way and got the exact same result (included video). The PNG files do not look like they should jump when I look at them individually. And I used a fresh Blender file for the test model and a separate new file for the video sequence. It is such a strange thing and I have tried everything I can think of.
My system is an Alienware R14 tower with an AMD Ryzen 9 processor and an 3080 RTX Nvida graphics card, and I have 64GB of RAM. I dont think this is a hardware issue. Not to mention I have done similar animations many, many times.
Blend file: https://www.dropbox.com/scl/fo/mwpqo8rybnajtwti3vjh0/h?dl=0&rlkey=1w2n0py3g7m2t5pn4unk9bc48
Video: https://www.dropbox.com/s/a778uy02qm2xlu4/test%20video0001-0329.mp4?dl=0
If anyone has ideas why this has started, I would sure appreciate the help.
Thanks
Hal
Hi Harlen HalRoseberry ,
For some reason that I do not understand (I'd even call this a bug), the default sorting method of the files has been changed in 3.5 and therefor it loads your images in the wrong order as you can see
Change this back to Sort by Name and it works as expected.
Wow! Yes, that does it! Thank you, Martin! I spent most of an entire day trying to figure out what happened. I appreciate this very much.
Indeed. I literally spent 6 hours deleting cameras, removing any animation in the scene (thinking I might have some hidden overlap), resetting up the whole thing, then making and rendering the test. I could walk through the PNG files and see that they should sequence correctly, but just couldnt understand why they didnt when I used the viewer in the sequencer. The issue would be entirely hidden if the renders werent pumping out in half a second. The "date modified" sorting couldnt tell the correct order because the renders were happening so quickly. I think that meant it was putting them in a bit of a random order for those that happened in the same minute. If my system had taken longer to render each one, it wouldnt have shown up. I would have reformatted the hardrive and reloaded my operating system and never figured it out!
