BrokenPipeError: [Errno 32] Broken pipe

hi, I had the following error: [could not acquire lock for <_io.BufferedReader name=10>…] as suggested in previous issue –> updated imageio with the updated release imageio-ffmpeg 0.4.0 rerun my code and getting the following error:

[BrokenPipeError: [Errno 32] Broken pipe
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
  File "/Users/xxx/opt/anaconda3/envs/cvA2Zcourse/lib/python3.7/site-packages/imageio_ffmpeg/_io.py", line 483, in write_frames
    raise IOError(msg)
OSError: [Errno 32] Broken pipe
FFMPEG COMMAND:
/Users/xxx/opt/anaconda3/envs/cvA2Zcourse/bin/ffmpeg -y -f rawvideo -vcodec rawvideo -s 1920x1080 -pix_fmt rgb24 -r 30.00 -i - -an -vcodec libx264 -pix_fmt yuv420p -crf 25 -vf scale=1920:1088 -v warning /Users/xxx/PycharmProjects/cvA2Zcourse/output.mp4
FFMPEG STDERR OUTPUT:
]

the code is simple read-write example: (Doing some Object Detection on a video)

reader = imageio.get_reader('funny_dog.mp4')
fps = reader.get_meta_data()['fps']
writer = imageio.get_writer('output.mp4', fps = fps)
for i, frame in enumerate(reader):
    frame = detect(frame, net.eval(), transform)
    writer.append_data(frame)
    print(i)
writer.close()

run on mac

@almarklein

_Originally posted by @shimrite in https://github.com/imageio/imageio/issues/482#issuecomment-588189474_

[jaewooklee93]

For me, it was not the issue of ffmpeg executable, and it was simply width and height are not even number for my situation. Thus, after proper padding of np.ndarray, broken pipe error has gone.

It would be nice if more elaborated error message is given for this specific situation 😃

[almarklein]

@jaewooklee93 wow, thanks for the insight, I would not have thought of that. I cannot produce the error this way, but maybe a combination of things can cause this to happen.

If anyone else could try and see if this would fix it, that would be great! We could then also look into creating a solution for this issue.