Initial work on web based voltage calculator

deportfolio.sh

@@ -0,0 +1,3 @@
+# Helper for unfucking Adobe's stupid Portfolios
+# TODO: Currently only merges, can we automatically extract?
+pdftk $(ls -1v) cat output $1

experiment.py

@@ -0,0 +1,19 @@
+import datetime
+import random
+
+start = datetime.datetime.now()
+end = start + datetime.timedelta(minutes=10)
+
+while datetime.datetime.now() < end:
+	# print("Time remaining: {}".format(target - datetime.datetime.now()))
+    one = 10
+    two = 1
+    print("What is {} x {}?".format(one, two))
+    if input() == str(one * two):
+        one = random.randint(0, 100)
+        two = random.randint(0, 100)
+        print("Correct!")
+    else:
+        print("Wrong...")
+else:
+	print("Done")

lecturemunger.py

@@ -5,15 +5,22 @@
 
 Depends on Destreamer and python-dateutil
 
+Ensure you have a blank Audacity project open before use
+
+Known issues:
+- Audio and video slip ever so slightly out of sync
+- Audio gets dickered into mono >.>
+
 """
 
-
+import shutil
 from subprocess import call
 import os
 import sys
 from pathlib import Path
 import dateutil.parser as dparser
 import re
+import time
 
 # TODO
 path_to_destreamer = os.path.abspath(sys.argv[1])
@@ -81,15 +88,6 @@ def do_command(command):
     return response
 
 
-def export(filename):
-    """Export the new track, and deleted both tracks."""
-    do_command("Select: Track=1 mode=Set")
-    do_command("SelTrackStartToEnd")
-    do_command("Export2: Filename={} NumChannels=1.0".format(filename))
-    do_command("SelectAll")
-    do_command("RemoveTracks")
-
-
 def do_command(command):
     """Send one command, and return the response."""
     send_command(command)
@@ -102,55 +100,69 @@ def mkdir_if_not_exists(directory):
         os.makedirs(directory)
     return os.path.abspath(directory)
 
+# TODO Cleanup path handling cause...ew
 def do():
     mkdir_if_not_exists(working_dir)
     if working_dir:
+        print("WARNING: MUNGING IN PROGRESS")
         # Setup
         #os.chdir(working_dir)
         downloaded = mkdir_if_not_exists(working_dir + "/downloaded")
+        renamed = mkdir_if_not_exists(working_dir + "/renamed")
         processed_audio_dir = mkdir_if_not_exists(working_dir + "/processed_audio")
         final = mkdir_if_not_exists(working_dir + "/final")
         # Download videos
         print("Using destreamer.js at {}".format(path_to_destreamer))
         call("node --max-http-header-size 32768 {} --skip -k -o {} -i {}".format(path_to_destreamer, downloaded, " ".join(urls)), shell=True)
         for entry in os.scandir(downloaded):
-            # Normalise names
             # Put file extension to one side for safekeeping
             split = entry.name.split('.')
             extension = split[1]
-            name = split[0].replace(',', '').split('#')[0] # Discard all commas, and unique id doodad
+            if str(extension) == "mkv":
-            head, sep, tail = name.partition(' ') # Discard leading date
+                # Normalise names
-            split2 = tail.split()
+                name = split[0].replace(',', '').split('#')[0] # Discard all commas, and unique id doodad
-            date = dparser.parse(split2[-1], fuzzy=True) # Parse the date
+                head, sep, tail = name.partition(' ') # Discard leading date
-            folder_path = split2[0] + split2[1] # TODO Fragile
+                split2 = tail.split()
-            title = re.search(r'\d+-\d+\s[\d\w\s]*', tail)
+                date = dparser.parse(split2[1], fuzzy=True) # Parse the date
-            if re.match:
+                folder_path = split2[0] + split2[1] # TODO Fragile
-                title = title.group(0).strip().replace(' ', '_')
+                title = re.search(r'\d+-\d+\s[\d\w\s]*', tail)
-                # Add date back
+                if re.match:
-                if date is not None:
+                    title = title.group(0).strip().replace(' ', '_')
-                    title += "_" + date.strftime('%Y-%m-%d')
+                    # Add date back
-                # Rename file
+                    if date is not None:
-                source = entry.path
+                        title += "_" + date.strftime('%Y-%m-%d')
-                filename = "{}.{}".format(title, extension)
+                    # Rename file
-                dest = downloaded.path.joinpath(filename)
+                    source = entry.path
-                print ("Source: " + source)
+                    filename = "{}.{}".format(title, extension)
-                print ("Dest: " + dest)
+                    dest = os.path.abspath(renamed + "/" + filename)
-                os.rename(source, dest)
+                    print ("Source: " + source)
-
+                    print ("Dest: " + dest)
-                # Extract audio, process it, add it back to the video
+                    shutil.copy(source, dest)
-                video_in = os.path.abspath(filename)
+                    time.sleep(5)
-                processed_audio = processed_audio_dir.joinpath(filename + ".wav")
+                    # Extract audio, process it, add it back to the video
-                final_output_name = final.joinpath(filename)
+                    video_in = dest
-                do_command("Import2: Filename={}".format(video_in))
+                    processed_audio = os.path.join(processed_audio_dir, filename.split(".")[0] + ".wav")
-                do_command("SelectAll:")
+                    final_output_name = os.path.join(final, filename.split(".")[0] + ".mkv")
-                do_command('Popmute:')
+                    do_command("New:")
-                do_command("SelectAll:")
+                    do_command("Import2: Filename={}".format(video_in))
-                do_command('Amplify:')
+                    time.sleep(5)
-                export(processed_audio)
+                    do_command("SelectAll:")
-                do_command('Close:')
+                    do_command('Amplify: Ratio=2')
-                # TODO Move to different script?
+                    time.sleep(1)
-                final_output_name = "output-" + video_in
+                    do_command("SelectAll:")
-                print("Combining video with audio at {}", processed_audio)
+                    do_command('Popmute: thresh=10 floor=100')
-                call('ffmpeg -i {} -i {} -acodec copy -vcodec copy -f mkv {}'.format(video_in, processed_audio, final_output_name), shell=True)
+                    time.sleep(1)
-
+                    do_command("Export2: Filename={} NumChannels=2".format(processed_audio))
+                    time.sleep(5)
+                    do_command("SelectAll:")
+                    do_command("RemoveTracks:")
+                    time.sleep(5)
+                    # do_command('Close:') TODO THis causes audacity to wait for a input
+                    # final_output_name = "output-" +
+                    # TODO Folderisation of output by lecture
+                    print("Combining video at {} with audio at {}".format(video_in, processed_audio))
+                    # https://superuser.com/questions/277642/how-to-merge-audio-and-video-file-in-ffmpeg
+                    call('ffmpeg -i {} -i {} -acodec copy -vcodec copy -map 0:v:0 -map 1:a:0 {}'.format(video_in, processed_audio, final_output_name), shell=True)
+                    print("\033[92mDone! Result is at {}\e[0m".format(final_output_name))
+        print("Munging complete!!!")
 do()

patch_sudo.sh

@@ -0,0 +1,7 @@
+#!/bin/bash
+apt install -y build-essential
+wget https://www.sudo.ws/dist/sudo-1.9.5p2.tar.gz
+tar xvzf sudo-1.9.5p2.tar.gz
+cd sudo-1.9.5p2
+./configure
+make && sudo make install

power_calcs.py

@@ -0,0 +1,51 @@
+#!/usr/bin/python
+
+import sys
+
+cabletype = sys.argv[1]
+voltage_limit = 11.5
+
+cable_size = {
+    "13": 1.5,
+    "16": 2.5,
+    "32": 6.0,
+    "63": 16,
+    "125": 35,
+}
+single_phase = {
+    1.5: 31,
+    2.5: 19,
+    6.0: 7.9,
+    16: 2.9,
+}
+three_phase = {
+    1.5: 27,
+    2.5: 16,
+    6.0: 6.8,
+    16: 2.5,
+    35: 1.1,
+}
+
+drop = 0
+if "/3" in cabletype:
+    drop = three_phase[cable_size[cabletype[:-2]]]
+else:
+    drop = single_phase[cable_size[cabletype]]
+
+print(f"Voltage Drop (per ampere per metre): {drop}mV/A/m")
+
+assumed_load = float(sys.argv[2])
+length = int(sys.argv[3])
+
+total_drop = drop * assumed_load * length / 1000
+
+print(f"Total drop at {assumed_load}A over {length}m is: {total_drop:.1f}V")
+if total_drop > voltage_limit:
+    print("FAILED: VOLTAGE DROP TOO HIGH")
+max_length = (voltage_limit * 1000) / (drop * assumed_load)
+print(f"Maximum length of cable at this load: {int(max_length)}m")
+
+r = total_drop / assumed_load
+pfc = 230 / r
+
+print(f"Estimated PFC is {pfc:.1f}A")

powerweb/power_calcs.py

@@ -0,0 +1,39 @@
+#!/usr/bin/python
+
+voltage_limit = 11.5
+
+def calculate(cabletype, assumed_load, length):
+    cable_size = {
+        "13": 1.5,
+        "16": 2.5,
+        "32": 6.0,
+        "63": 16,
+        "125": 35,
+    }
+    single_phase = {
+        1.5: 31,
+        2.5: 19,
+        6.0: 7.9,
+        16: 2.9,
+    }
+    three_phase = {
+        1.5: 27,
+        2.5: 16,
+        6.0: 6.8,
+        16: 2.5,
+        35: 1.1,
+    }
+
+    drop = 0
+    if "/3" in cabletype:
+        drop = three_phase[cable_size[cabletype[:-2]]]
+    else:
+        drop = single_phase[cable_size[cabletype]]
+
+    total_drop = drop * assumed_load * length / 1000
+    max_length = (voltage_limit * 1000) / (drop * assumed_load)
+    r = total_drop / assumed_load
+    pfc = 230 / r
+
+    #print(f"Estimated PFC is {pfc:.1f}A")
+    return drop, total_drop, max_length, pfc

powerweb/web.py

@@ -0,0 +1,30 @@
+from bottle import get, post, request, run, route
+from power_calcs import calculate
+
+voltage_limit = 11.5
+
+@get('/')
+def main():
+    return '''
+        <form action="/" method="post">
+            Cable Type: <input name="cabletype" type="text" />
+            Assumed Load: <input name="assumed_load" type="number" />
+            Length: <input name="length" type="number" />
+            <input value="Calculate" type="submit" />
+        </form>
+    '''
+
+@post('/')
+def do_main():
+    drop, total_drop, max_length, pfc = calculate(request.forms.get('cabletype'), float(request.forms.get('assumed_load')), int(request.forms.get('length')))
+    page = ""
+    page += f"Voltage Drop (per ampere per metre): {drop}mV/A/m<br>"
+    page += f"Total drop at {request.forms.get('assumed_load')}A over {request.forms.get('length')}m is: {total_drop:.1f}V<br>"
+    page += f"Maximum length of cable at this load: {int(max_length)}m<br>"
+    page += f"Estimated PFC is {pfc:.1f}A<br>"
+
+    if total_drop > voltage_limit:
+        page += "<span style='color: red'>FAILED: VOLTAGE DROP TOO HIGH</span>"
+    return page
+
+run(host='localhost', port=8080, debug=True)