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I had the same problem with the precompiled version, the version compiled by myself and with the latest version 2.4.9, so I guess it could be a bug of the 2.4 version related to ffmpeg.

I found this bug report.

How I solved it

• I downloaded VirtualDub

• I opened my AVI video file and re-encoded with "microsoft video 1" codecs. You have to select video->compress and there you will have the drivers available at your computer.

It looks like OpenCV can deal with this compression. It is just a temporary solution but you can keep working, at least.

I had the same problem with the precompiled version, the version compiled by myself and with the latest version 2.4.9, so I guess it could be a bug of the 2.4 version related to ffmpeg.

I found this bug report.

How I solved it

• I downloaded VirtualDub

• I opened my AVI video file and re-encoded with "microsoft video 1" codecs. You have to select video->compressvideo -> compress and there you will have the drivers available at your computer.

It looks like OpenCV can deal with this compression. It is just a temporary solution but you can keep working, at least.