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example how to create a video using PyBullet using GUI mode with ffmpeg, synchronizing video with stepSimulation at specific frame rate (240 Hz for example)

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Erwin Coumans 2020-01-11 13:06:45 -08:00
parent 2336dfcb9e
commit 8f8bbbee3b
1 changed files with 24 additions and 0 deletions
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examples/pybullet/examples/video_sync_mp4.py Normal file
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import pybullet as p
import time
#by default, PyBullet runs at 240Hz
p.connect(p.GUI, options="--mp4=\"test.mp4\" --mp4fps=240")
p.configureDebugVisualizer(p.COV_ENABLE_SINGLE_STEP_RENDERING,1)
p.loadURDF("plane.urdf")
#in 3 seconds, the object travels about 0.5*g*t^2 meter ~ 45 meter.
r2d2 = p.loadURDF("r2d2.urdf",[0,0,45])
#disable linear damping
p.changeDynamics(r2d2,-1, linearDamping=0)
p.setGravity(0,0,-10)
for i in range (3*240):
txt = "frame "+str(i)
item = p.addUserDebugText(txt, [0,1,0])
p.stepSimulation()
#synchronize the visualizer (rendering frames for the video mp4) with stepSimulation
p.configureDebugVisualizer(p.COV_ENABLE_SINGLE_STEP_RENDERING,1)
#print("r2d2 vel=", p.getBaseVelocity(r2d2)[0][2])
p.removeUserDebugItem(item)
p.disconnect()