docPhil99

1. Make the spice mix:

• 1 Tbs ground allspice
• 1 Tbs ground cinnamon
• 1 Tbs ground nutmeg
• 1 tsp ground cloves
• 1 tsp ground coriander
• 1 tsp ground ginger

You can keep the leftovers in a jar.

docPhil99

1. Start the v4l2loopback module:

sudo modprobe v4l2loopback \
      devices=1 exclusive_caps=1 video_nr=5 card_label="Dummy Camera"

• This creates one device with a label "Dummy Camera" as device `/dev/video5
• See https://github.com/umlaeute/v4l2loopback/ for more detailts

2. I have a short test video call Speed1.avi, this can be played streamed to /dev/video5 with ffmpeg -re -stream_loop -1 -i Speed1.avi -vcodec rawvideo -pix_fmt yuv420p -f v4l2 /dev/video5

docPhil99

A simple example of code for testing a custom tensorflow Keras layer

    def my_init(shape, dtype=None):
        """This function is a custom kernel initialiser. It loads the weights from a matlab file. Adapt as need"""
        matlab = io.loadmat('../matlab/weights.mat')
        wfilter = matlab['wfilter']
        if shape != wfilter.shape:
            raise Exception('Shaped do not match')
        return tf.constant(wfilter, dtype=dtype)

docPhil99

This is running on Linux Mint 20

• Install docker.

  • sudo apt-get -y install apt-transport-https ca-certificates curl software-properties-common

  • curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo apt-key add -

  • sudo add-apt-repository "deb [arch=amd64] https://download.docker.com/linux/ubuntu $(. /etc/os-release; echo "$UBUNTU_CODENAME") stable"

  • sudo apt-get update

  • sudo apt install docker-ce docker-compose

  • sudo usermod -aG docker $USER

• and test with docker --version

docPhil99

It's actually fairly easy to control Home Assistant remotely using curl but I couldn't find a complete solution on how to do this, so here goes...

1. Activate the api in configuration.yaml by adding the line api:
2. Get an Authorization token from HA (It's a Long-Lived Access Tokens which can be created on your HA user profile page)
3. This list of exposed states can be found using curl -X GET -H "Authorization: Bearer YOUR_TOKEN" -H "Content-Type: application/json" http://YOUR_IP:8123/api/states | prettyjson

• Note prettyjson is an alias for python -m json.tool, you don't need this it's just easier to read.

4. To get the state of a device append the entity.id to the URL, eg curl -X GET -H "Authorization: Bearer YOUR_TOKEN" -H "Content-Type: application/json" http://YOUR_IP:8123/api/states/switch.mylight | prettyjson
5. The API documentation shows you how to change the states but this does not actually turn on the lights, etc. Instead, us

docPhil99

To convert a video to 16x9 or 9x16 by adding black bars use ffmpeg as follows ffmpeg -i film1.mp4 -vf "scale=1920:1080:force_original_aspect_ratio=decrease,pad=1920:1080:(ow-iw)/2:(oh-ih)/2,setsar=1" film1_bars.mp4

This add bars to the top and bottom, flip both of the 1920:1080 to 1080:1920 for horizontal bars (better for computer monitors, TV etc)

Note IGTV also requires h.264 and a max of 30fps.

Thanks to https://stackoverflow.com/a/46693766/3361398

docPhil99

Speed

• ffmpeg -i input.mkv -filter:v "setpts=0.5*PTS" output.mkv increases doubles playback speed, by dropping frames see

Playback

• ffmpeg -i input.mp4 -f opengl "window title" or use ffplay

Convertion

• ffmpeg -i video.flv video.mpeg

docPhil99

"""Simple demo of argparse in python, see http://zetcode.com/python/argparse/"""

import argparse

parser = argparse.ArgumentParser()

parser.add_argument('name')   # positional argument, note no dash!
parser.add_argument('-n', type=int, required=True,  help="the number")  # Required argument, must be a int, eg. -n 4
parser.add_argument('-e', type=int, default=2, help="defines the value") # Optional argument with a default
parser.add_argument('-o', '--output', action='store_true', help="shows output")  # a binary flag

docPhil99

Split directory into a new repo

• clone the repo into a new directory
• cd into it
• git filter-branch --prune-empty --subdirectory-filter FOLDER-NAME BRANCH-NAME
  • where:
  • FOLDER-NAME: The folder within your project that you'd like to create a separate repository from.
  • BRANCH-NAME: The default branch for your current project, for example, master.
• Update the remote git remote set-url origin https://github.com/USERNAME/NEW-REPOSITORY-NAME.git
• Verify git remote -v
• Push the changes git push -u origin BRANCH-NAME

docPhil99

The code for this tutorial is here

Opencv provides are useful, but limited, method of building a GUI. A much more complete system could be acheived using pyqt. The question is, how do we display images. There are quite a few possible routes but perhaps the easiest is to use QLabel since it has a setPixmap function. Below is some code that creates two labels. It then creates a grey pixmap and displays it one of the labels. code: staticLabel1.py

from PyQt5.QtWidgets import QWidget, QApplication, QLabel, QVBoxLayout
from PyQt5.QtGui import QPixmap, QColor
import sys