_physics_process is called twice as fast in Movie Maker mode

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1

Godot Version

4.4.1.stable

Question

Hi!
I’m trying to record a clip of my game using Movie Maker mode in Godot editor. However, my game runs about twice as fast in that mode. The issue is, the physics seems to tick more often. Here’s the code I have in my scene:

var time = Time.get_ticks_usec()

func _physics_process(delta: float) -> void:
	var time2 = Time.get_ticks_usec()
	print(delta, " time: ", time2 - time)
	time = time2

Basically, I measure the physics tick delta and the actual time elapsed between physics ticks. With the usual 60 fps I get the following results:

0.01666666666667 time: 16637
0.01666666666667 time: 16687
0.01666666666667 time: 18306
0.01666666666667 time: 15669
0.01666666666667 time: 16635

Pretty consistent, and one physics tick is roughly equal to the actual frame time.
Now, when I run this in 30 fps:

0.01666666666667 time: 39
0.01666666666667 time: 33538
0.01666666666667 time: 42
0.01666666666667 time: 33107

Physics is processed at the same 60 fps, and this corresponds to 2 ticks per frame (on average). The game runs with the same speed as with 60 fps, so no issues here.
Now, when I start the same scene in Movie Maker mode, things get crazy:

0.01666666666667 time: 29
0.01666666666667 time: 9560
0.01666666666667 time: 28
0.01666666666667 time: 9379
0.01666666666667 time: 28
0.01666666666667 time: 9475

The delta doesn’t match the actual time on average any more. The game runs at about 1.5x speed.
I don’t have any _process overrides, everything happens in _physics_process.

Is this some editor bug, or am I doing something wrong here? Is there a setting that I can change in order to record the video of the scene normally?

2

Movie Maker mode runs as fast as possible to ensure the video is done recording as soon as possible. The final video file will play at the intended speed regardless. You can limit the recording speed using V-Sync and reducing your monitor refresh rate to match the video FPS.

Unfortunately, the Max FPS project setting doesn’t work when fixed FPS is engaged currently (which is always the case when using Movie Maker mode). However, you should be able to use external FPS limiting tools like RTSS on Windows sor libstrangle on Linux.