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OpenCV on Linux #3418

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patrikhuber opened this issue May 3, 2018 · 2 comments · Fixed by #5169
Closed

OpenCV on Linux #3418

patrikhuber opened this issue May 3, 2018 · 2 comments · Fixed by #5169
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category:port-bug The issue is with a library, which is something the port should already support

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@patrikhuber
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I installed opencv:x64-linux. During the installation, OpenCV downloads opencv_ffmpeg.dll, which is probably for Windows.
I didn't get any build errors afterwards, but ffmpeg doesn't appear to be working.

Starting package 5/5: opencv:x64-linux
Building package opencv[core,ffmpeg,jpeg,png,tiff]:x64-linux...
[...]
-- Downloading https://raw.githubusercontent.com/opencv/opencv_3rdparty/0a0e88972a7ea97708378d0488a65f83e7cc5e69/ffmpeg/opencv_ffmpeg.dll...
-- Downloading https://raw.githubusercontent.com/opencv/opencv_3rdparty/0a0e88972a7ea97708378d0488a65f83e7cc5e69/ffmpeg/opencv_ffmpeg.dll... OK
-- Testing integrity of downloaded file...
-- Testing integrity of downloaded file... OK
-- Downloading https://raw.githubusercontent.com/opencv/opencv_3rdparty/0a0e88972a7ea97708378d0488a65f83e7cc5e69/ffmpeg/opencv_ffmpeg_64.dll...
-- Downloading https://raw.githubusercontent.com/opencv/opencv_3rdparty/0a0e88972a7ea97708378d0488a65f83e7cc5e69/ffmpeg/opencv_ffmpeg_64.dll... OK
-- Testing integrity of downloaded file...
-- Testing integrity of downloaded file... OK
-- Downloading https://raw.githubusercontent.com/opencv/opencv_3rdparty/0a0e88972a7ea97708378d0488a65f83e7cc5e69/ffmpeg/ffmpeg_version.cmake...
-- Downloading https://raw.githubusercontent.com/opencv/opencv_3rdparty/0a0e88972a7ea97708378d0488a65f83e7cc5e69/ffmpeg/ffmpeg_version.cmake... OK
@arthur-tacca
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Similarly opencv[ipp] downloads the Windows .dll even when building on Linux, and the build silently succeeds without IPP support.

@arthur-tacca
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Somewhat related: #2799 OpenCV should copy/install opencv_ffmpeg340_64.dll

@LarryIII LarryIII added the category:port-bug The issue is with a library, which is something the port should already support label Feb 13, 2019
@cenit cenit mentioned this issue Jun 20, 2019
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[OpenCV] Update to v4.1.1 cenit/vcpkg
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@patrikhuber @arthur-tacca @LarryIII