opencv @3.2.0: error: property 'activeVideoMaxFrameDuration' not found on object of type 'AVCaptureDevice *'; did you mean 'activeVideoMinFrameDuration'?

[ssimogh]

ssimo@MacBook-Pro-de-Stephane-Simon:~$ sudo port clean opencv
--->  Cleaning opencv
ssimo@MacBook-Pro-de-Stephane-Simon:~$ sudo port upgrade outdated
--->  Computing dependencies for opencv
--->  Fetching archive for opencv
--->  Attempting to fetch opencv-3.2.0_1.darwin_12.x86_64.tbz2 from https://packages.macports.org/opencv
--->  Attempting to fetch opencv-3.2.0_1.darwin_12.x86_64.tbz2 from http://nue.de.packages.macports.org/opencv
--->  Attempting to fetch opencv-3.2.0_1.darwin_12.x86_64.tbz2 from http://fco.it.packages.macports.org/mirrors/macports-packages/opencv/opencv
--->  Fetching distfiles for opencv
--->  Verifying checksums for opencv
--->  Extracting opencv
--->  Applying patches to opencv
--->  Configuring opencv
--->  Building opencv
Error: Failed to build opencv: command execution failed
Error: See /opt/local/var/macports/logs/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_graphics_opencv/opencv/main.log for details.
Error: Follow https://guide.macports.org/#project.tickets to report a bug.

[ssimogh]

/opt/local/var/macports/logs/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_graphics_opencv/opencv/main.log

[ssimogh]

Excuse me, do you plan to fix this build error or my OSX version is too old (Mountain Lion 10.8.5) ? I could understand this choice. 10.8 is kind of obsolete OS.

Thank you.

Best regards.

[ryandesign (Ryan Carsten Schmidt)]

Has duplicate #55279.

It's not up to us to fix it. The opencv 3.2.0 code uses activeVideoMaxFrameDuration which was introduced in OS X 10.9. If you want opencv to work on earlier systems, ​file a bug report with the developers of opencv.

[kencu (Ken)]

See 53562#comment:14 for a simple fix that works on older systems. Please comment on whether this fix leaves opencv in a functional state for you.

[mascguy (Christopher Nielsen)]

MacOS 10.8 builds have been fine for some time. Can this be closed?

[kencu (Ken)]

some time being 10 days since I fixed it :>

<​https://github.com/macports/macports-ports/commit/876ff1d844b345dc7b965964020866de797a9606#diff-592ca8f9f33e3cf3a02bd82c7a777b50f3182bb935c5de563635a14f9d1be6f8>

[kencu (Ken)]

I am still not 100% certain that is the right fix -- perhaps using a newer SDK would have allowed video capture using the AVFoundation on 10.7+. I just didn't try that, and nobody else has in 3 years, so I turned it off -- apparently it's not a major issue to anyone to try to make opencv use the camera on a 10.7 machine at present, not surprisingly.

[mascguy (Christopher Nielsen)]

Ugh, I'm seeing the same failure when building opencv4, on MacOS 10.8.5.

I'll add that fix to my opencv4 pull request...

[mascguy (Christopher Nielsen)]

Fix committed for opencv4:

​https://github.com/macports/macports-ports/pull/9555/commits/3afbbaee592672fcb027aa350c968d0a2d9546cc