Clear previous frame from video pipeline

Hi Marco,

I am trying to create a video sequence from some pcds that I am loading each time based on the tutorials, however the viewer and the output video file just puts the new pcds on top of each other so it accumulates all the scenes. Is it possible to clear the previous loaded pcd before I show the new one and added to the video output as a new frame.

Code snippet:

cam = dict(
        pos=(-3.373, -1.983, -3.673),
        focalPoint=(-0.3201, -0.2132, 1.150),
        viewup=(0.1560, -0.9551, 0.2518),
        distance=5.976,
        clippingRange=(2.888, 9.879),
    )
vp = vd.Plotter(axes=0, interactive=0, sharecam=False)

video = vd.Video("elephant.mp4", backend='ffmpeg')  # backend='opencv'

for i, pcd in enumerate(scanned_pcds):
    p = vd.Points(pcd)
   
    vp.show(p.lighting(style='metallic'), elevation=1, azimuth=2, camera=cam)  # render the scene
    video.addFrame() # add frame

video.close()
vp.show().close()

Thanks.

[ttsesm]

Hi what if you remove it explicitly:

    vp.show(p.lighting(style='metallic'), elevation=1, azimuth=2, camera=cam)  # render the scene
    vp.remove(p)

ok Marco, sorry my bad. This actually works, you just need to add the video.addFrame() before the remove:

vp.show(p.lighting(style='metallic'), camera=cam)  # render the scene
video.addFrame()
vp.remove(p)

My apologies. Pfff, long day at work…

[marcomusy]

what about

from vedo import *

scanned_pcds = [Points(np.random.rand(100,3)), Points(np.random.rand(100,3)+0.5)]

vp = Plotter()

vp.show(Axes(scanned_pcds[0]))

for i, pcd in enumerate(scanned_pcds):
    pcd.lighting(style='metallic')
    vp.add(pcd)
    vp.screenshot(f'm{i}.png') # or add frame
    vp.remove(pcd)

vp.interactive()