diff --git a/ffmpeg/arm/Dockerfile b/ffmpeg/arm/Dockerfile
new file mode 100644
index 0000000..410fdda
--- /dev/null
+++ b/ffmpeg/arm/Dockerfile
@@ -0,0 +1,13 @@
+#
+# Dockerfile for ffmpeg-arm
+#
+
+FROM easypi/alpine-arm
+MAINTAINER EasyPi Software Foundation
+
+RUN apk add --no-cache ffmpeg
+
+WORKDIR /data
+
+ENTRYPOINT ["ffmpeg"]
+CMD ["--help"]
diff --git a/rtmp/README.md b/rtmp/README.md
index dda99c1..750eeb1 100644
--- a/rtmp/README.md
+++ b/rtmp/README.md
@@ -27,7 +27,7 @@ server:
 
 client:
   image: easypi/rtmp-client-arm
-# command: ffmpeg -i /dev/video0 -vf "hflip,vflip" -f flv rtmp://cctv.easypi.info/live/webcam
+# command: ffmpeg -i /dev/video0 -video_size 640x480 -vf "hflip,vflip" -f flv rtmp://cctv.easypi.info/live/webcam
   devices:
     - /dev/video0:/dev/video0
   environment:
@@ -83,9 +83,18 @@ $ cd ~/fig/rtmp/
 $ docker-compose up -d client
 ```
 
+## OBS
+
+```yaml
+Stream Type: Custom Streaming Server
+URL: rtmp://192.168.31.254/live/
+Streaming key: webcam
+```
+
 ## References
 
 - https://github.com/arut/nginx-rtmp-module/wiki/Directives
 - https://trac.ffmpeg.org/wiki/StreamingGuide
 - https://trac.ffmpeg.org/wiki/Capture/Webcam
+- https://trac.ffmpeg.org/wiki/EncodingForStreamingSites
 - http://apk-dl.com/vlc-for-android/org.videolan.vlc/
diff --git a/rtmp/client/Dockerfile b/rtmp/client/Dockerfile
index be59745..2dcddda 100644
--- a/rtmp/client/Dockerfile
+++ b/rtmp/client/Dockerfile
@@ -2,10 +2,9 @@
 # Dockerfile for rtmp-client-arm
 #
 
-FROM easypi/alpine-arm
-MAINTAINER EasyPi Software Foundation
+FROM easypi/ffmpeg-arm
 
-RUN apk add --no-cache ffmpeg
+MAINTAINER EasyPi Software Foundation
 
 ENV RTMP_DEV=/dev/video0 \
     RTMP_FMT=flv \