AssertionError about Vmaf in Windows10

[zzq0516]

I used this https://github.com/Netflix/vmaf/blob/master/resource/doc/windows.md way to bulid projects in windows system,but when i run run_vmaf.py it gave me a error about AssertionError,can you tell me some wrong with this.

[Nil Fons Miret]

Hi,

I don't have access to a Windows system at the moment, but taking a look at the meson documentation and trying it out on my Mac, I have found the following:

1. The following instruction in our Windows docs seems wrong - the order of the arguments should be meson setup builddir srcdir, but we are passing them as meson setup srcdir builddir. However, trying it out on my system, Meson is smart enough to understand which one is the srcdir, so I don't think this is causing your problem.
2. The meson install -C libvmaf/build is going to install VMAF at the path provided with --prefix earlier. The run_vmaf.py script expects an installed VMAF at libvmaf/build/tools/vmaf. I see two possible fixes:
   a) If you have access to ninja, you can run ninja -vC libvmaf/build, and that will generate the build files in the right location.
   b) Otherwise, you can create a file in python/vmaf/externals.py and specify the path to your VMAF executable like this:

VMAFEXEC_PATH = '<path to your executable>'

The following commands worked on my system without using ninja:

# Here, you can replace /tmp/vmaf with any absolute path you like
meson setup libvmaf/build libvmaf -Denable_float=true --prefix /tmp/vmaf
meson install -C libvmaf/build
# Replace /tmp/vmaf with whatever path you used earlier
echo "VMAFEXEC_PATH = '/tmp/vmaf/bin/vmaf'" > python/vmaf/externals.py
# Run the run_vmaf.py script
PYTHONPATH=python ./python/vmaf/script/run_vmaf.py \           
  yuv420p 576 324 \
  src01_hrc00_576x324.yuv \
  src01_hrc01_576x324.yuv \
  --out-fmt json

[Nil Fons Miret]

Closing as inactive, please reopen if you are still having this issue.