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Error in video writing tutorial

asked 2020-01-12 07:40:03 -0500

Gourav gravatar image

when i ran the code from video writing tutorial I got the followign error

[ERROR:0] global C:\opencv\source\opencv-4.1.2\opencv-4.1.2\modules\videoio\src\cap.cpp (392) open VIDEOIO(CV_IMAGES): raised OpenCV exception:

OpenCV(4.1.2) C:\opencv\source\opencv-4.1.2\opencv-4.1.2\modules\videoio\src\cap_images.cpp:253: error: (-5:Bad argument) CAP_IMAGES: can't find starting number (in the name of file): MegamindR.avi in function 'icvExtractPattern'
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answered 2020-01-12 07:47:08 -0500

berak gravatar image

updated 2020-01-14 03:14:57 -0500

it probably means:

you don't have opencv_videoio_ffmpeg412.dll on your path (this contains the actual video codecs).

since it could not find it, it tried to fall back to read an image sequence instead, and this lacked some pattern, like img%05d.png


append the folder containing opencv_videoio_ffmpeg412.dll to your PATH env var.

(again, error is already reading the video, not writing)

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Asked: 2020-01-12 07:40:03 -0500

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Last updated: Jan 14