Fix Docker ffmpeg

Dockerfile

@@ -19,20 +19,24 @@ RUN dotnet publish Jellyfin.Server --configuration Release --output="/jellyfin"
 FROM jellyfin/ffmpeg:${FFMPEG_VERSION} as ffmpeg
 
 FROM mcr.microsoft.com/dotnet/core/runtime:${DOTNET_VERSION}
-COPY --from=ffmpeg / /
+COPY --from=ffmpeg /opt/ffmpeg /opt/ffmpeg
 COPY --from=builder /jellyfin /jellyfin
 COPY --from=web-builder /dist /jellyfin/jellyfin-web
 # Install dependencies:
 #   libfontconfig1: needed for Skia
+#   libgomp1: needed for ffmpeg
+#   libva-drm2: needed for ffmpeg
 #   mesa-va-drivers: needed for VAAPI
 RUN apt-get update \
  && apt-get install --no-install-recommends --no-install-suggests -y \
-   libfontconfig1 mesa-va-drivers \
+   libfontconfig1 libgomp1 libva-drm2 mesa-va-drivers \
  && apt-get clean autoclean \
  && apt-get autoremove \
  && rm -rf /var/lib/apt/lists/* \
  && mkdir -p /cache /config /media \
- && chmod 777 /cache /config /media
+ && chmod 777 /cache /config /media \
+ && ln -s /opt/ffmpeg/bin/ffmpeg /usr/local/bin \
+ && ln -s /opt/ffmpeg/bin/ffprobe /usr/local/bin
 
 EXPOSE 8096
 VOLUME /cache /config /media