fix(media): Update video.py: Fix fps bug

[stellargo]

Change imageio to the updated parameter fps from duration. I am a first time contributor, please let me know if I need to change the format of the PR. I like using wandb, and believe people can benefit from this fix :)

Description

When I log gifs from numpy arrays to wandb, even when the frame rate is passed, it does not seem to obey it. This fix ensures that the correct frame rate gif is created and logged to the wandb console.

Testing

In the examples below, I log a video with the same number of frames (44) using the following piece of code. The output duration of the gif should be 44/24 = 1.76 seconds. However, as visible below, the before gif has a longer duration.

wandb.log({'video': wandb.Video(final, fps=25)})

Before:

After:

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (b4a6ec7) 79.56% compared to head (191e193) 64.98%.

Additional details and impacted files

@@             Coverage Diff             @@
##             main    #6887       +/-   ##
===========================================
- Coverage   79.56%   64.98%   -14.58%     
===========================================
  Files         452      451        -1     
  Lines       50667    50243      -424     
===========================================
- Hits        40311    32652     -7659     
- Misses      10065    17350     +7285     
+ Partials      291      241       -50     

Flag	Coverage Δ
func	50.19% <ø> (-1.15%)	⬇️
system	?
unit	58.93% <ø> (+0.02%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files	Coverage Δ
wandb/sdk/data_types/video.py	85.96% <ø> (+7.89%)	⬆️

... and 176 files with indirect coverage changes

[dmitryduev]

Thank you for the fix, @stellargo!