Initial, rough AWS lambda script for the webcam.

index.js

"use strict";

const aws = require("aws-sdk");
const s3 = new aws.S3({ apiVersion: "2006-03-01" });
const dynamodb = new aws.DynamoDB();

const isNum = n => !isNaN(parseFloat(n)) && isFinite(n);

exports.handler = (event, context, callback) => {
  const jsonFileName = "14th-street-webcam.json";
  const minsAgo = 45;
  const startTime = new Date(Date.now() - (minsAgo + 1) * 60 * 1000)
    .getTime()
    .toString();

  const key = decodeURIComponent(
    event.Records[0].s3.object.key.replace(/\+/g, " ")
  );
  const keyName = key.slice(4, -4).replace(/_/g, ":");
  const timestamp = new Date(
    isNum(keyName) ? keyName * 1000 : keyName
  ).getTime();

  // console.log("now", Date.now());
  // console.log("tzoffset", new Date().getTimezoneOffset());
  // console.log("startTime", startTime);
  // console.log("key", key.slice(4, -4));
  // console.log("keyName", keyName);
  // console.log("timestamp", timestamp);

  const newItem = {
    Item: {
      webcam: { S: "14th-street" },
      filename: { S: key },
      timestamp: { N: timestamp.toString() }
    },
    ReturnConsumedCapacity: "TOTAL",
    TableName: "webcams"
  };
  dynamodb.putItem(newItem, function(err, data) {
    if (err) {
      console.log(err, err.stack);
    } else {
      console.log(data);
    }
  });

  const query = {
    ExpressionAttributeValues: {
      ":v1": { S: "14th-street" },
      ":startTime": { N: startTime }
    },
    KeyConditionExpression: "webcam = :v1 AND #ts > :startTime",
    ExpressionAttributeNames: { "#ts": "timestamp" }, // 'timestamp' is a reserved word
    ProjectionExpression: "#ts, filename",
    TableName: "webcams"
  };
  dynamodb.query(query, (err, data) => {
    if (err) {
      console.log(err, err.stack);
    } else {
      const feed = {
        startTime: new Date(parseInt(startTime, 10)).toLocaleString("en-us", {
          hour12: false,
          timeZone: "America/New_York",
          month: "long",
          day: "2-digit",
          year: "numeric",
          hour: "2-digit",
          minute: "2-digit",
          second: "2-digit",
          timeZoneName: "short"
        }),
        count: data.Items.length,
        images: data.Items.map(
          e => "https://s3.amazonaws.com/14th-street-webcam/" + e.filename.S
        )
      };
      s3.putObject(
        {
          Body: JSON.stringify(feed, null, 2),
          Bucket: "14th-st-test-feed-bucket",
          Key: jsonFileName,
          ContentType: "application/json"
        },
        (err, data) => {
          if (err) console.log(err, err.stack);
          else console.log(data);
        }
      );
    }
  });
};

webcam.sh

#! /usr/bin/env bash

curl --digest -u webcam:14street http://192.168.0.14/mjpeg/snap.cgi?chn=0 > /tmp/cam.jpg

# FILENAME="cam-$(stat -c %Y /tmp/cam.jpg).jpg"
FILENAME="cam-$(date --iso-8601=seconds -d @$(stat -c %Y /tmp/cam.jpg) | tr : _).jpg"

scp /tmp/cam.jpg joemaller.com:/home/joemaller/webapps/joemaller/webcam-new/cam.jpg
#scp /tmp/cam.jpg joemaller.com:/home/joemaller/webapps/joemaller/webcam-new/$FILENAME

aws s3 cp /tmp/cam.jpg s3://14th-street-webcam/$FILENAME