How to benchmark the FPS during playback

[Chi Ngai Lai]

Hi All,

I'm going  to write a script, which I want a realtime FPS value during the scene playback. 

I've tried the following codes, which were not worked for me. 

# specify how many times for playing

cmds.playbackOptions(loop='once')

# scrub the time cursor to frame 1

cmds.currentTime(1)

# begin to play

cmds.play()

# make sure the scene is playing, then query for the realtime fps value

if cmds.play(q=True, st=True):

    print cmds.playbackOptions(fps=True)

Result: it only print 0.0 at the beging, then it stops printing fps values, and the scene was continue playing.

I've to manually keep executing those 2 lines of "if" codes, then it could keep printing the realtime fps value for me. 

But I want it automatically keep printing the fps values for me during the playback. 

Any thoughts? Much appreciate in advance. :)

Cheers,

Parker

[Marcus Ottosson]

As you haven’t gotten a reply, I’ll share what I was thinking at first.

If you count the time between the frames, you can calculate your own fps.

import time

time_before = time.time()

# your code here
time.sleep(0.1)  # Pretend it takes a tenth of a second per frame

time_after = time.time()
time_delta = time_after - time_before
fps = 1.0 / time_delta

print "%f fps" % fps

Which prints, around:

9.30343 fps

​

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Marcus Ottosson
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[Chi Ngai Lai]

Hi Marcus,

Thank you for your reply!

Actually I used the similar method to write a function yesterday, and I would like to share the codes here. 

def getFPS(startFrame, totalFrames):     

cmds.currentTime(startFrame)

startTime = time.time()

for i in range(startFrame,startFrame+totalFrames):

   cmds.currentTime(i)

fps = totalFrames/(time.time()-startTime)

return fps 

I consider this is the workaround solution, and I just wondering whether there were any API Class could do this? 

Thanks,

Parker

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Marcus Ottosson
konstr...@gmail.com