#11615: Web site Documentation - possibe error in
https://trac.ffmpeg.org/wiki/CompilationGuide/Ubuntu#
---------------------------------+---------------------------------------
             Reporter:  ezgoen   |                     Type:  defect
               Status:  new      |                 Priority:  normal
            Component:  website  |                  Version:  unspecified
             Keywords:  libvmaf  |               Blocked By:
             Blocking:           |  Reproduced by developer:  0
Analyzed by developer:  0        |
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 In the section regarding libvmaf in
 https://trac.ffmpeg.org/wiki/CompilationGuide/Ubuntu#

 compiling with the result of the steps described:

 wget https://github.com/Netflix/vmaf/archive/v3.0.0.tar.gz && \
 tar xvf v3.0.0.tar.gz && \ ...
 At the time of writing there are no .git folders in this archive.

 This generates a git error in the line within
 vmaf-3.0.0/libvmaf/build/build.ninja
 I note that the following line produces a fatal error
 --git-dir .../ffmpeg/sources/vmaf-3.0.0/libvmaf/../.git describe --tags
 --long --match '?.*.*' --always

 This is a git error NOT a compile error but results in a meson argument
 with a bogus component which may result in a failure to build



 I have rewritten the example with seemingly reliable results as :

   cd ~/ffmpeg_sources && \
   git clone  https://github.com/Netflix/vmaf.git vmaf-3.0.0 && \
   mkdir -p vmaf-3.0.0/libvmaf/build && \
   cd vmaf-3.0.0/libvmaf/build && \
   meson setup -Denable_tests=false -Denable_docs=false --buildtype=release
 --default-library=static .. --prefix "$HOME/ffmpeg_build"
 --bindir="$HOME/bin" --libdir="$HOME/ffmpeg_build/lib" && \
   ninja && \
   ninja install

 The only caveat may be that
 git clone  https://github.com/Netflix/vmaf.git
 may always retrieve the latest release which means the version may end up
 mismatching with the code examples

 In case this helps someone
-- 
Ticket URL: <https://trac.ffmpeg.org/ticket/11615>
FFmpeg <https://ffmpeg.org>
FFmpeg issue tracker
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