Add png-split-stream package

We're going to use ffmpeg to convert a video stream into a stream of png
data.  This package will take that stream of pngs and split them into
independent chunks of data.

Issue #64

packages/video-image-extractor/package.json

@@ -12,7 +12,8 @@
   "module": "src/index.js",
   "dependencies": {
     "@tvkitchen/appliance-core": "0.5.0",
-    "command-exists": "^1.2.9"
+    "command-exists": "^1.2.9",
+    "png-split-stream": "^1.0.1"
   },
   "publishConfig": {
     "access": "public"

yarn.lock

@@ -1448,6 +1448,14 @@ bindings@^1.5.0:
   dependencies:
     file-uri-to-path "1.0.0"
 
+bl@^1.1.2:
+  version "1.2.3"
+  resolved "https://registry.yarnpkg.com/bl/-/bl-1.2.3.tgz#1e8dd80142eac80d7158c9dccc047fb620e035e7"
+  integrity sha512-pvcNpa0UU69UT341rO6AYy4FVAIkUHuZXRIWbq+zHnsVcRzDDjIAhGuuYoi0d//cwIwtt4pkpKycWEfjdV+vww==
+  dependencies:
+    readable-stream "^2.3.5"
+    safe-buffer "^5.1.1"
+
 brace-expansion@^1.1.7:
   version "1.1.11"
   resolved "https://registry.yarnpkg.com/brace-expansion/-/brace-expansion-1.1.11.tgz#3c7fcbf529d87226f3d2f52b966ff5271eb441dd"
@@ -1508,6 +1516,11 @@ bser@2.1.1:
   dependencies:
     node-int64 "^0.4.0"
 
+buffer-equal@^1.0.0:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/buffer-equal/-/buffer-equal-1.0.0.tgz#59616b498304d556abd466966b22eeda3eca5fbe"
+  integrity sha1-WWFrSYME1Var1GaWayLu2j7KX74=
+
 buffer-from@^1.0.0:
   version "1.1.1"
   resolved "https://registry.yarnpkg.com/buffer-from/-/buffer-from-1.1.1.tgz#32713bc028f75c02fdb710d7c7bcec1f2c6070ef"
@@ -4075,6 +4088,14 @@ pn@^1.1.0:
   resolved "https://registry.yarnpkg.com/pn/-/pn-1.1.0.tgz#e2f4cef0e219f463c179ab37463e4e1ecdccbafb"
   integrity sha512-2qHaIQr2VLRFoxe2nASzsV6ef4yOOH+Fi9FBOVH6cqeSgUnoyySPZkxzLuzd+RYOQTRpROA0ztTMqxROKSb/nA==
 
+png-split-stream@^1.0.1:
+  version "1.0.1"
+  resolved "https://registry.yarnpkg.com/png-split-stream/-/png-split-stream-1.0.1.tgz#f95b924516e783eec51ac778a678fd1f3dab8e40"
+  integrity sha1-+VuSRRbng+7FGsd4pnj9Hz2rjkA=
+  dependencies:
+    bl "^1.1.2"
+    buffer-equal "^1.0.0"
+
 posix-character-classes@^0.1.0:
   version "0.1.1"
   resolved "https://registry.yarnpkg.com/posix-character-classes/-/posix-character-classes-0.1.1.tgz#01eac0fe3b5af71a2a6c02feabb8c1fef7e00eab"
@@ -4187,7 +4208,7 @@ read-pkg@^5.2.0:
     parse-json "^5.0.0"
     type-fest "^0.6.0"
 
-readable-stream@^2.0.2:
+readable-stream@^2.0.2, readable-stream@^2.3.5:
   version "2.3.7"
   resolved "https://registry.yarnpkg.com/readable-stream/-/readable-stream-2.3.7.tgz#1eca1cf711aef814c04f62252a36a62f6cb23b57"
   integrity sha512-Ebho8K4jIbHAxnuxi7o42OrZgF/ZTNcsZj6nRKyUmkhLFq8CHItp/fy6hQZuZmP/n3yZ9VBUbp4zz/mX8hmYPw==
@@ -4426,6 +4447,11 @@ safe-buffer@^5.0.1, safe-buffer@^5.1.2:
   resolved "https://registry.yarnpkg.com/safe-buffer/-/safe-buffer-5.2.0.tgz#b74daec49b1148f88c64b68d49b1e815c1f2f519"
   integrity sha512-fZEwUGbVl7kouZs1jCdMLdt95hdIv0ZeHg6L7qPeciMZhZ+/gdesW4wgTARkrFWEpspjEATAzUGPG8N2jJiwbg==
 
+safe-buffer@^5.1.1:
+  version "5.2.1"
+  resolved "https://registry.yarnpkg.com/safe-buffer/-/safe-buffer-5.2.1.tgz#1eaf9fa9bdb1fdd4ec75f58f9cdb4e6b7827eec6"
+  integrity sha512-rp3So07KcdmmKbGvgaNxQSJr7bGVSVk5S9Eq1F+ppbRo70+YeaDxkw5Dd8NPN+GD6bjnYm2VuPuCXmpuYvmCXQ==
+
 safe-buffer@~5.1.0, safe-buffer@~5.1.1:
   version "5.1.2"
   resolved "https://registry.yarnpkg.com/safe-buffer/-/safe-buffer-5.1.2.tgz#991ec69d296e0313747d59bdfd2b745c35f8828d"