From 19817ddf1f2682c7e009622a5d283b0106a5c931 Mon Sep 17 00:00:00 2001
From: Johnathan Amit-Kanarek <johnathan.kanarek@gmail.com>
Date: Wed, 5 Aug 2020 11:22:50 +0300
Subject: [PATCH 1/2] Expose ffmpeg child-process

---
 README.md | 5 +++++
 index.js  | 9 +++++++++
 2 files changed, 14 insertions(+)

diff --git a/README.md b/README.md
index 1c3fabd..5d5c2c8 100644
--- a/README.md
+++ b/README.md
@@ -132,6 +132,9 @@ Edit specs are JavaScript / JSON objects describing the whole edit operation wit
   enableFfmpegLog: false,
   verbose: false,
   fast: false,
+
+  onStart: (cmd) => console.log('Command:', cmd),
+  onProcessStart: (subprocess) => subprocess.stdout.pipe(process.stdout),
 }
 ```
 
@@ -156,6 +159,8 @@ Edit specs are JavaScript / JSON objects describing the whole edit operation wit
 | `clips[].transition` | | Specify transition at the **end** of this clip. See `defaults.transition` | `defaults.transition` | |
 | `clips[].layers[]` | | List of layers within the current clip that will be overlaid in their natural order (last layer on top) | | |
 | `clips[].layers[].type` | | Layer type, see below | | |
+| `onStart` | | Callback function, called before ffmpeg process start with command line as string argument | | |
+| `onProcessStart` | | Callback function, called after ffmpeg process start with subprocess argument | | |
 
 ### Transition types
 
diff --git a/index.js b/index.js
index 075dfe4..d5306e7 100644
--- a/index.js
+++ b/index.js
@@ -39,8 +39,15 @@ module.exports = async (config = {}) => {
 
     ffmpegPath = 'ffmpeg',
     ffprobePath = 'ffprobe',
+
+    onStart,
+    onProcessStart,
+    
   } = config;
 
+  assert(!onStart || typeof onStart === 'function', 'Callback onStart expected to be a function');
+  assert(!onProcessStart || typeof onProcessStart === 'function', 'Callback onProcessStart expected to be a function');
+
   const isGif = outPath.toLowerCase().endsWith('.gif');
 
   const audioFilePath = isGif ? undefined : audioFilePathIn;
@@ -314,6 +321,7 @@ module.exports = async (config = {}) => {
       ...outputArgs,
     ];
     if (verbose) console.log('ffmpeg', args.join(' '));
+    if (onStart) onStart(`ffmpeg ${args.join(' ')}`);
     return execa(ffmpegPath, args, { encoding: null, buffer: false, stdin: 'pipe', stdout: process.stdout, stderr: process.stderr });
   }
 
@@ -323,6 +331,7 @@ module.exports = async (config = {}) => {
 
   try {
     outProcess = startFfmpegWriterProcess();
+    if (onProcessStart) onProcessStart(outProcess);
     let outProcessError;
 
     // If we don't catch it here, the whole process will crash and we cannot process the error

From fecceb87b6bac4ceb62697c2e0003b481638913b Mon Sep 17 00:00:00 2001
From: Johnathan Amit-Kanarek <johnathan.kanarek@gmail.com>
Date: Wed, 5 Aug 2020 11:58:08 +0300
Subject: [PATCH 2/2] Support remote input files over http

---
 index.js | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/index.js b/index.js
index d5306e7..c758686 100644
--- a/index.js
+++ b/index.js
@@ -19,7 +19,7 @@ const loadedFonts = [];
 // See #16
 const checkTransition = (transition) => assert(transition == null || typeof transition === 'object', 'Transition must be an object');
 
-const assertFileExists = async (path) => assert(await fs.exists(path), `File does not exist ${path}`);
+const assertFileExists = async (path, enableRemote) => assert((enableRemote && path.startsWith('http')) || await fs.exists(path), `File does not exist ${path}`);
 
 
 module.exports = async (config = {}) => {
@@ -52,7 +52,7 @@ module.exports = async (config = {}) => {
 
   const audioFilePath = isGif ? undefined : audioFilePathIn;
 
-  if (audioFilePath) await assertFileExists(audioFilePath);
+  if (audioFilePath) await assertFileExists(audioFilePath, true);
 
   checkTransition(defaultsIn.transition);
 
@@ -76,7 +76,7 @@ module.exports = async (config = {}) => {
 
     // https://github.com/mifi/editly/issues/39
     if (type === 'image') {
-      await assertFileExists(restLayer.path);
+      await assertFileExists(restLayer.path, true);
     } else if (type === 'gl') {
       await assertFileExists(restLayer.fragmentPath);
     }