I am on V 3.0.1 drawing a scene to png.
It’s a 10fps animation, of a graphical bar at the bottom of another project. The render is eevee, the scene is very simple, a few animated objects and a few objects with image textures on. The image resolution is 1920 x 30 (yes only 30pix high).
This is probably a very uncommon problem, but how do i SLOW DOWN the render? It seems to crash after about 1000 frames, but there are 468,000 frames of animation to output (e.g 12 hours). I can only imagine it is rendering so fast that problems are ocurring.
Processes aren’t allowed to use all of the system RAM, every process is capped at a fraction. Blender will never use anywhere near the 16 GB you have, I’m pretty sure each process caps at 50%, so you could use at max 8 GB for Blender. Given that you’re seeing 7GB usage, you’re definitely close to your RAM limit, and I would imagine you’re using more than is being reported for system processes
Ok if you tried both that at least answer the question.
You can try to make a default scene with your rendersettings, and see if that lead to the same issue.
Then post that .blend and I can try to render it and see if that lead to the same crash.
Blender is documented as rapidly accumulating RAM and VRAM on large animations - https://developer.blender.org/T78537, for instance, although there’s many more examples you can find - even if you have enough RAM for 500k frames, do you have enough VRAM?
It was rendering away at high speed, probably a crash would be incoming. I tried to change the “render display window” in the corner, to something else, such as the text editor. Then I noticed at a certain point on the main screen’s timeline, the frame marker stopped advancing, like it had crashed, but the render progress bar was stopped at 99%.
Blender would then let me change stuff in the scene, but I could not re-render, and when I tried to revert the scene to try reload and maybe the stuck render would stopped, it then had the “program has stopped responding” freeze up. Dunno if any of that helps?
There is one other thing maybe worth mentioning now that I think of it. The scene uses the “LeoMoon” text counter addon which updates an text objects per-frame with a value for a count up or count down.
However, I have completely removed all text objects that had that on them from the scene, the issue still presents.
I’ve seen several posts about blender ceasing to render, resulting in a crash.
Is there a memory leak?
I’ve had a scene or two crash like that but without rhyme or reason.
Have you tried to render on the command line?
Ok ! So if that still crash with the default scene then it’s not related to the addon or your scene.
At least it’s best to try without it to narrow down the issue.
I’ve launched the render with blender 3.1 on linux
I am rendering the actual original file with the problem. It has done now almost 50,000 frames without incident or crash via the command line. So, barring a technically accurate description, it seems that with the program open, it really IS rendering too fast for the full program to cope with, somehow.