split ffmpeg commands to multiples lines

src/main.ts

@@ -58,13 +58,21 @@ app.whenReady().then(() => {
     // Merge 2 audio
     // See: https://trac.ffmpeg.org/wiki/AudioChannelManipulation#a2stereostereo
     await execute(
-      `"${ffmpegPath}" -y -i "${file}" -filter_complex "[0:a]amerge=inputs=2[a]" -ac 2 -map 0:v -map "[a]" -c:v copy "${tmpFile}"`
+      `"${ffmpegPath}" -y \
+      -i "${file}" \
+      -filter_complex "[0:a]amerge=inputs=2[a]" -ac 2 -map 0:v -map "[a]" \
+      -c:v copy \
+      "${tmpFile}"`
     ).catch((e) => printAndDevTool(win, e));
 
     // Add merged audio as first position to original video and make it default
     // About disposition: https://ffmpeg.org/ffmpeg.html#Main-options
     await execute(
-      `"${ffmpegPath}" -y -i "${tmpFile}" -i "${file}" -map 0 -map 1:a -c:v copy -disposition:a 0 -disposition:a:0 default "${outFile}"`
+      `"${ffmpegPath}" -y \
+      -i "${tmpFile}" -i "${file}" \
+      -map 0 -map 1:a -c:v copy \
+      -disposition:a 0 -disposition:a:0 default \
+      "${outFile}"`
     ).catch((e) => printAndDevTool(win, e));
 
     // Delete the temporary video file
@@ -87,8 +95,14 @@ app.whenReady().then(() => {
     const nul = process.platform === "win32" ? "NUL" : "/dev/null";
 
     await execute(
-      `"${ffmpegPath}" -y -i "${file}" -c:v libx264 -b:v ${videoBitrate}k -pass 1 -an -f mp4 ${nul} && \
-     "${ffmpegPath}" -y -i "${file}" -c:v libx264 -b:v ${videoBitrate}k -pass 2 -c:a copy -map 0:0 -map 0:1 -map 0:2 -map 0:3 -f mp4 "${finalFile}"`
+      `"${ffmpegPath}" -y \
+      -i "${file}" -c:v libx264 -b:v ${videoBitrate}k -pass 1 -an -f mp4 \
+      ${nul} \
+      && \
+      "${ffmpegPath}" -y \
+      -i "${file}" -c:v libx264 -b:v ${videoBitrate}k -pass 2 -c:a copy \
+      -map 0:0 -map 0:1 -map 0:2 -map 0:3 -f mp4 \
+      "${finalFile}"`
     ).catch((e) => printAndDevTool(win, e));
 
     // Delete the old video file