From e9fe07c5011e8783543d727e743a5c3acc3d4dde Mon Sep 17 00:00:00 2001
From: drawcall <ajiemath@gmail.com>
Date: Fri, 18 Dec 2020 18:10:43 +0800
Subject: [PATCH] feat: add conf crf and preset

feat: add conf crf and preset
---
 lib/conf/conf.js      |  3 +++
 lib/core/synthesis.js | 15 ++++++++++++---
 package.json          |  2 +-
 3 files changed, 16 insertions(+), 4 deletions(-)

diff --git a/lib/conf/conf.js b/lib/conf/conf.js
index daa45950..079b8f21 100755
--- a/lib/conf/conf.js
+++ b/lib/conf/conf.js
@@ -20,6 +20,9 @@ class Conf {
     this.conf = conf;
 
     this.conf.pathId = Utils.uid();
+    this.copyByDefaultVal(conf, 'crf', 20);
+    this.copyByDefaultVal(conf, 'vb', null);
+    this.copyByDefaultVal(conf, 'preset', 'medium');
     this.copyByDefaultVal(conf, 'debug', false);
     this.copyByDefaultVal(conf, 'audioLoop', true);
     this.copyByDefaultVal(conf, 'defaultOutputOptions', true);
diff --git a/lib/core/synthesis.js b/lib/core/synthesis.js
index 30d9f910..4dd80cb5 100755
--- a/lib/core/synthesis.js
+++ b/lib/core/synthesis.js
@@ -115,8 +115,12 @@ class Synthesis extends EventEmitter {
    */
   getDefaultOutputOptions() {
     const {conf} = this;
+    const vb = conf.getVal('vb');
     const fps = conf.getVal('fps');
-    const opts = []
+    const crf = conf.getVal('crf');
+    const preset = conf.getVal('preset');
+
+    let opts = []
       // misc
       .concat([
         '-hide_banner', // hide_banner - parameter, you can display only meta information
@@ -133,9 +137,9 @@ class Synthesis extends EventEmitter {
         '-profile:v',
         'main', // profile:v - main profile: mainstream image quality. Provide I / P / B frames
         '-preset',
-        'medium', // preset - compromised encoding speed
+        preset, // preset - compromised encoding speed
         '-crf',
-        '20', // crf - The range of quantization ratio is 0 ~ 51, where 0 is lossless mode, 23 is the default value, 51 may be the worst
+        crf, // crf - The range of quantization ratio is 0 ~ 51, where 0 is lossless mode, 23 is the default value, 51 may be the worst
         '-movflags',
         'faststart',
         '-pix_fmt',
@@ -144,6 +148,11 @@ class Synthesis extends EventEmitter {
         fps,
       ]);
 
+    //---- vb -----
+    if (vb) {
+      opts = opts.concat(['-vb', vb]);
+    }
+
     return opts;
   }
 
diff --git a/package.json b/package.json
index dd46fcc9..6aa4ea7f 100755
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "ffcreator",
-  "version": "1.3.9",
+  "version": "1.3.10",
   "description": "FFCreator is a lightweight and flexible short video production library",
   "main": "lib/index.js",
   "scripts": {