[FFmpeg-user] ERROR: libvmaf >= 2.0.0 not found using pkg-config

[桃源老師]

Hello, 

> 2022/02/04 午前0:19、Moritz Barsnick <barsnick at gmx.net>のメール:
> 
> On Thu, Feb 03, 2022 at 21:07:08 +0900, 桃源老師 wrote:
>> I experienced funny ffmpeg compille error "ERROR: libvmaf >= 2.0.0 not found using pkg-config".  The reason why I feel funny is that ffmpeg commit of "06a54a4ec73ea6eb8cec41b7af75367bafb075e0(Date: Sat Jan 22 10:32:34 2022 +0100)" can configure and make correctly, but current git head can't configure.  I suppose something wrong was happened after 2022/01/22.
>> 
>> I'm trying to build ffmpeg on macOS 12.2.
> 
> So, what's your actual version of libvmaf? Because _after_ commit
> 06a54a4ec73ea6eb8cec41b7af75367bafb075e0, the requirement was increased
> to 2.0.0.

I installed: 
roushinoMacBook-Pro-15:bin roushi$ ./vmaf --version
2.3.0

> If you're using git anyway, you could do a "git bisect".

I didn't know such a git option... Here is: 

roushinoMacBook-Pro-15:ffmpeg roushi$ git bisect start 3d29724c008d8f27fecf85757152789b074e8ef9 06a54a4ec73ea6eb8cec41b7af75367bafb075e0
Already on 'master'
Your branch is up to date with 'origin/master'.
3d29724c008d8f27fecf85757152789b074e8ef9 is the first bad commit
commit 3d29724c008d8f27fecf85757152789b074e8ef9
Author: Kyle Swanson <kswanson at netflix.com>
Date:   Fri Dec 24 12:43:50 2021 -0800

    avfilter/vf_libvmaf: update filter for libvmaf v2.0.0

 configure                |   4 +-
 doc/filters.texi         |  82 +++---
 libavfilter/version.h    |   2 +-
 libavfilter/vf_libvmaf.c | 682 +++++++++++++++++++++++++++++++++++------------
 4 files changed, 558 insertions(+), 212 deletions(-)

> 
>> /var/folders/1d/qk_hczkn68xfv_7gdbkmhwx40000gn/T//ffconf.DmkkrFIx/test.c:3:44: error: use of undeclared identifier 'vmaf_init'
>> long check_vmaf_init(void) { return (long) vmaf_init; }
> 
> It seems to me that vmaf_init() had existed before, so I'm not sure why
> this would happen.

I'm afraid thet is it a bug of macOS...

// Miya
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