add flag keepSourceAudio

README.md

@@ -113,6 +113,7 @@ Edit specs are JavaScript / JSON objects describing the whole edit operation wit
     }
   },
   audioFilePath,
+  keepSourceAudio,
   clips: [
     {
       transition,
@@ -144,6 +145,7 @@ Edit specs are JavaScript / JSON objects describing the whole edit operation wit
 | `height` | `--height` | Height which all media will be converted to | auto based on `width` and aspect ratio of **first video** | |
 | `fps` | `--fps` | FPS which all videos will be converted to | First video FPS or `25` | |
 | `audioFilePath` | `--audio-file-path` | Set an audio track for the whole video | | |
+| `keepSourceAudio` | `--keep-source-audio` | Keep audio from source files | | |
 | `fast` | `--fast`, `-f` | Fast mode (low resolution and FPS, useful for getting a quick preview) | `false` | |
 | `defaults.layer.fontPath` | `--font-path` | Set default font to a .ttf | System font | |
 | `defaults.layer.*` | | Set any layer parameter that all layers will inherit | | |

cli.js

@@ -32,6 +32,7 @@ const cli = meow(`
     --fps  FPS which all videos will be converted to
     --font-path  Set default font to a .ttf
     --audio-file-path  Add an audio track
+    --keep-source-audio  Keep audio from source files
 
     --fast, -f  Fast mode (low resolution and FPS, useful for getting a quick preview)
     --verbose, -v
@@ -45,6 +46,7 @@ const cli = meow(`
 `, {
   flags: {
     verbose: { type: 'boolean', alias: 'v' },
+    keepSourceAudio: { type: 'boolean' },
     fast: { type: 'boolean', alias: 'f' },
     transitionDuration: { type: 'number' },
     clipDuration: { type: 'number' },
@@ -92,7 +94,7 @@ const cli = meow(`
     params.clips = clips.map((clip) => ({ layers: [clip] }));
   }
 
-  const { verbose, transitionName, transitionDuration, clipDuration, width, height, fps, audioFilePath, fontPath, fast, out: outPath } = cli.flags;
+  const { verbose, transitionName, transitionDuration, clipDuration, width, height, fps, audioFilePath, fontPath, fast, out: outPath, keepSourceAudio } = cli.flags;
 
   if (transitionName || transitionDuration != null) {
     params.defaults.transition = {};
@@ -110,6 +112,7 @@ const cli = meow(`
 
   if (outPath) params.outPath = outPath;
   if (audioFilePath) params.audioFilePath = audioFilePath;
+  if (keepSourceAudio) params.keepSourceAudio = true;
   if (width) params.width = width;
   if (height) params.height = height;
   if (fps) params.fps = fps;

index.js

@@ -36,6 +36,7 @@ module.exports = async (config = {}) => {
     fps: requestedFps,
     defaults: defaultsIn = {},
     audioFilePath: audioFilePathIn,
+    keepSourceAudio,
 
     ffmpegPath = 'ffmpeg',
     ffprobePath = 'ffprobe',
@@ -250,7 +251,7 @@ module.exports = async (config = {}) => {
   await fs.remove(tmpDir);
   await fs.mkdirp(tmpDir);
 
-  if (!audioFilePath) {
+  if (!audioFilePath && keepSourceAudio) {
     audioFilePath = await editAudio({ clips, tmpDir });
   }