gif-maker sample

Signed-off-by: Alex Ellis <alexellis2@gmail.com>

gif-maker/Dockerfile

+FROM alpine:3.6
+
+RUN apk --no-cache add ffmpeg gifsicle curl \
+   && curl -LS https://github.com/alexellis/faas/releases/download/0.5.6-alpha/fwatchdog > /usr/bin/fwatchdog \
+   && chmod +x /usr/bin/fwatchdog \
+   && apk del curl
+WORKDIR /root/
+COPY entry.sh   .
+ENV fprocess="./entry.sh"
+CMD ["fwatchdog"]

gif-maker/README.md

+gif-maker
+=========
+
+Converts a .mov QuickTime video to a .gif
+
+Testing:
+
+```
+$ docker build -t alexellis/gif-maker .
+$ faas-cli deploy --fprocess="./entry.sh" \
+  --image get-giffy --name gif-maker
+
+# wait a little
+
+$ curl http://localhost:8080/function/gif-maker --data-binary @$HOME/Desktop/screen1.mov > screen1.gif
+```
+
+Try to use a small cropped video around 5MB. Timeouts may need to be extended for larger videos
+

gif-maker/entry.sh

+#!/bin/sh
+export nano=`date +%s%N`
+# -s 600x400
+cat - > ./$nano.mov
+ffmpeg -loglevel panic -i $nano.mov -vf scale=iw*.5:ih*.5 -pix_fmt rgb24 -r 20 -f gif - | gifsicle --optimize=3 --delay=3 > /dev/stdout \
+  && rm $nano.mov
+