inconsistent behaviour of clip.get_frame()

[TejasBob]

I'm trying following script in ipython terminal.

from moviepy.editor import *

clip = VideoFileClip(file_path, has_mask=True)
print(clip.duration) # 6.04
img = clip.get_frame(9)

This results in

OSError: MoviePy error: failed to read the first frame of video file file_path ...

but when I do

img = clip.get_frame(6)
img = clip.get_frame(9)

it doesn't fail. Instead it gives warning

... bytes wanted but 0 bytes read,at frame 225/152, at time 9.00/6.04 sec. Using the last valid frame instead.

[GarciaDelMolino]

when get_frame fails to read the requested frame, it returns "the last valid frame instead." If there is no previous frame, then it returns OSError. Check the source here.

In your case, you request the frame at time 9 seconds, which doesn't exist. If you have not requested any frame before (1st example), clip.get_frame will give an error. Otherwise (2nd example), a warning, returning the frame at time 6 seconds.

[TejasBob]

got it.

[keikoro]

@TejasBob It sounds like the above comment helped solve the problem, I'm thus closing this issue. Please reopen if the problem persists.