Building ffmpeg with avfoundation on OSX Lion

[p.ohanlon@…]

Currently ffmpeg has configuration in the Portfile to not build avfoundation indevice for OSX Lion:

    if {${os.major} < 12} {
        configure.args-append --disable-indev=avfoundation
    }

but it builds fine on OSX Lion when using the clang compiler. It could be nice to remove this restriction for OSX Lion from the Portfile and change the os.major check to be:

    if {${os.major} < 11} {
        configure.args-append --disable-indev=avfoundation
        configure.compiler clang
    }

[kencu (Ken)]

I built this on 10.7 today, enabling avfoundation like this:

    # kCVPixelFormatType_OneComponent8 used in avfoundation indev is only available on 10.8+
    if {${os.major} < 12} {
#        configure.args-append --disable-indev=avfoundation
    }

So the OP is right, this builds on 10.7 with clang without any trouble. I didn't force the compiler, current MacPorts defaults led 10.7 to use /usr/bin/clang. Log attached.

Looks like the test can be changed to ${os.major} < 11 at least...

[kencu (Ken)]

The have fixed up ffmpeg like this, to support older systems:

libavdevice/avfoundation.m

#if !TARGET_OS_IPHONE && __MAC_OS_X_VERSION_MIN_REQUIRED >= 1080
    { AV_PIX_FMT_GRAY8,        kCVPixelFormatType_OneComponent8 },
#endif

[kencu (Ken)]

in fact, 10.6.8 had no real issue with it as well, although I can't say for sure if it actually built anything differently.

Also, 10.6.8 can use the SDL2 outdev now, I notice.

[ken-cunningham-webuse]

In f9c360ab3daaeb75ede4c04f923aa6b3b5bafe07/macports-ports (master):

ffmpeg: enable avfoundation on 10.7

the previous definition missing from the 10.7 SDK has been
appropriately guarded by upstream, and this now builds
properly for 10.7

closes: #49841