Implement support for .avi files, via ffmpeg

- This commit introduces optional dependencies (namely ffmpeg):
  mat2 will spit a warning when trying to process an .avi file
  if ffmpeg isn't installed.
- Since metadata are obtained via exiftool, this commit
  also refactors a bit our exfitool wrapper.

1 files changed, 2 insertions, 2 deletions

diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 4f0a140..32ec086 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -42,7 +42,7 @@ tests:debian:
   stage: test
   script:
   - apt-get -qqy update
-  - apt-get -qqy install --no-install-recommends python3-mutagen python3-gi-cairo gir1.2-poppler-0.18 gir1.2-gdkpixbuf-2.0 libimage-exiftool-perl python3-coverage
+  - apt-get -qqy install --no-install-recommends python3-mutagen python3-gi-cairo gir1.2-poppler-0.18 gir1.2-gdkpixbuf-2.0 libimage-exiftool-perl python3-coverage ffmpeg
   - python3-coverage run --branch -m unittest discover -s tests/
   - python3-coverage report --fail-under=100 -m --include 'libmat2/*'
 
@@ -62,5 +62,5 @@ tests:archlinux:
   tags:
     - whitewhale
   script:
-  - pacman -Sy --noconfirm python-mutagen python-gobject gdk-pixbuf2 poppler-glib gdk-pixbuf2 python-cairo perl-image-exiftool python-setuptools mailcap
+  - pacman -Sy --noconfirm python-mutagen python-gobject gdk-pixbuf2 poppler-glib gdk-pixbuf2 python-cairo perl-image-exiftool python-setuptools mailcap ffmpeg
   - python3 setup.py test