When I said ffmpeg I meant ffmpeg libraries, chromium depends on several ffmpeg libraries (libavcodec, libavformat, libavutil, ...) and when I comment that chromium-67 is looking for ffmpeg-4 is because in other distros (archlinux, gentoo, ...) they are packaging chromium-67 pointing to ffmpeg-4 (libavcodec, libavformat, libavutil, ... from ffmpeg-4).
$ LC_ALL=C apt depends chromium chromium Depends: libasound2 (>= 1.0.16) Depends: libatk-bridge2.0-0 (>= 2.5.3) Depends: libatk1.0-0 (>= 1.12.4) |Depends: libavcodec57 (>= 7:3.4.2) <<<------ (*) Depends: libavcodec-extra57 (>= 7:3.4.2) <<<------ (*) Depends: libavformat57 (>= 7:3.4.2) <<<------ (*) Depends: libavutil55 (>= 7:3.4.2) <<<------ (*) Depends: libc6 (>= 2.27) Depends: libcairo2 (>= 1.6.0) Depends: libcups2 (>= 1.4.0) Depends: libdbus-1-3 (>= 1.9.14) Depends: libevent-2.1-6 (>= 2.1.8-stable) Depends: libexpat1 (>= 2.0.1) Depends: libflac8 (>= 1.3.0) Depends: libfontconfig1 (>= 2.12.6) Depends: libfreetype6 (>= 2.3.9) Depends: libgcc1 (>= 1:4.0) Depends: libgdk-pixbuf2.0-0 (>= 2.22.0) Depends: libglib2.0-0 (>= 2.31.8) Depends: libgtk-3-0 (>= 3.9.10) Depends: libharfbuzz0b (>= 1.6.0) Depends: libicu60 (>= 60.1-1~) Depends: libjpeg62-turbo (>= 1.5.0) Depends: liblcms2-2 (>= 2.2+git20110628) Depends: libminizip1 (>= 1.1) Depends: libnspr4 (>= 2:4.9-2~) Depends: libnss3 (>= 2:3.22) Depends: libopenjp2-7 (>= 2.2.0) Depends: libopus0 (>= 1.1) Depends: libpango-1.0-0 (>= 1.14.0) Depends: libpangocairo-1.0-0 (>= 1.14.0) Depends: libpng16-16 (>= 1.6.2-1) Depends: libpulse0 (>= 0.99.1) Depends: libre2-4 (>= 20160901) Depends: libsnappy1v5 Depends: libstdc++6 (>= 6) Depends: libvpx5 (>= 1.6.0) Depends: libwebp6 (>= 0.5.1) Depends: libwebpdemux2 (>= 0.5.1) Depends: libwebpmux3 (>= 0.6.1-2) Depends: libx11-6 (>= 2:1.4.99.1) Depends: libx11-xcb1 Depends: libxcb1 (>= 1.6) Depends: libxcomposite1 (>= 1:0.3-1) Depends: libxcursor1 (>> 1.1.2) Depends: libxdamage1 (>= 1:1.1) Depends: libxext6 Depends: libxfixes3 (>= 1:5.0) Depends: libxi6 (>= 2:1.2.99.4) Depends: libxml2 (>= 2.7.4) Depends: libxrandr2 (>= 2:1.2.99.3) Depends: libxrender1 Depends: libxslt1.1 (>= 1.1.25) Depends: libxss1 Depends: libxtst6 Depends: zlib1g (>= 1:1.2.2) Depends: chromium-common (= 67.0.3396.62-2) Conflicts: <libgl1-mesa-swx11> Conflicts: <libnettle4> Conflicts: libsecret-1-0 (<< 0.18) Recommends: libgl1-mesa-dri Recommends: fonts-liberation Suggests: chromium-l10n Suggests: chromium-shell Suggests: chromium-driver Regards.
