fix the instruction of the end to end demo and the rspi4 demo.

project-akri · Jan 22, 2021 · 2dbebb7 · 2dbebb7
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diff --git a/docs/end-to-end-demo-rpi4.md b/docs/end-to-end-demo-rpi4.md
@@ -47,6 +47,10 @@ The following will be covered in this demo:
 1. Open a new terminal and ssh into your ubuntu server that your cluster is running on.
 1. To setup fake usb video devices, install the v4l2loopback kernel module and its prerequisites. Learn more about v4l2 loopback [here](https://github.com/umlaeute/v4l2loopback)
     ```sh
+    sudo apt update
+    sudo apt -y install linux-headers-$(uname -r)
+    sudo apt -y install linux-modules-extra-$(uname -r)
+    sudo apt -y install dkms
     curl http://deb.debian.org/debian/pool/main/v/v4l2loopback/v4l2loopback-dkms_0.12.5-1_all.deb -o v4l2loopback-dkms_0.12.5-1_all.deb 
     sudo dpkg -i v4l2loopback-dkms_0.12.5-1_all.deb
     ```
@@ -76,6 +80,7 @@ The following will be covered in this demo:
     ```
 1. Now that our cameras are set up, lets use Gstreamer to pass fake video streams through them.
     ```sh
+    mkdir camera-logs
     sudo gst-launch-1.0 -v videotestsrc pattern=ball ! "video/x-raw,width=640,height=480,framerate=10/1" ! avenc_mjpeg ! v4l2sink device=/dev/video1 > camera-logs/ball.log 2>&1 &
     sudo gst-launch-1.0 -v videotestsrc pattern=smpte horizontal-speed=1 ! "video/x-raw,width=640,height=480,framerate=10/1" ! avenc_mjpeg ! v4l2sink device=/dev/video2 > camera-logs/smpte.log 2>&1 &
     ```

diff --git a/docs/end-to-end-demo.md b/docs/end-to-end-demo.md
@@ -19,6 +19,7 @@ The following will be covered in this demo:
 1. To setup fake usb video devices, install the v4l2loopback kernel module and its prerequisites. Learn more about v4l2 loopback [here](https://github.com/umlaeute/v4l2loopback)
     ```sh
     sudo apt update
+    sudo apt -y install linux-headers-$(uname -r)
     sudo apt -y install linux-modules-extra-$(uname -r)
     sudo apt -y install dkms
     curl http://deb.debian.org/debian/pool/main/v/v4l2loopback/v4l2loopback-dkms_0.12.5-1_all.deb -o v4l2loopback-dkms_0.12.5-1_all.deb
@@ -56,6 +57,7 @@ The following will be covered in this demo:
     ```
 1. Now that our cameras are set up, lets use Gstreamer to pass fake video streams through them.
     ```sh
+    mkdir camera-logs
     sudo gst-launch-1.0 -v videotestsrc pattern=ball ! "video/x-raw,width=640,height=480,framerate=10/1" ! avenc_mjpeg ! v4l2sink device=/dev/video1 > camera-logs/ball.log 2>&1 &
     sudo gst-launch-1.0 -v videotestsrc pattern=smpte horizontal-speed=1 ! "video/x-raw,width=640,height=480,framerate=10/1" ! avenc_mjpeg ! v4l2sink device=/dev/video2 > camera-logs/smpte.log 2>&1 &
     ```