bump version to 1.11.2

This reverts commit c8538f5d03.

.forgejo/workflows/release.yml

@@ -0,0 +1,28 @@
+name: Upload release
+
+on:
+  push:
+    tags:
+      - "*"
+
+jobs:
+  build:
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Install dependencies
+        run: |
+          npm install --platform=win32 &&
+          apt-get update &&
+          apt-get install -y zip
+
+      - name: Build the app
+        run: npm run make -- --platform=win32
+
+      - name: Create release
+        uses: akkuman/gitea-release-action@v1
+        with:
+          token: ${{ secrets.TOKEN }}
+          files: out/make/zip/win32/x64/dsr-win32-x64-${{ github.ref_name }}.zip
+          draft: true

README.md

@@ -1,8 +1,50 @@
-# Discord Video Sharing
+# Discord Video Sharing [![status-badge](https://git.mylloon.fr/Anri/dsr/badges/workflows/release.yml/badge.svg)](https://git.mylloon.fr/Anri/dsr/actions?workflow=release.yml)
 
-- [x] Try to keep the video under 25mb
+Tool for sharing video to Discord.
+
+> This tool was primarily made for video captured by NVidia Shadowplay.
+
+## Download/Install/Update
+
+2 choices :
+
+- Manually head to [the release page](https://git.mylloon.fr/Anri/dsr/releases/latest).
+- Download it via PowerShell:
+
+  ```powershell
+  irm https://git.mylloon.fr/Anri/dsr/raw/branch/main/install.ps1 | iex
+  ```
+
+## Available flags
+
+You can add thoses flags in the `Target` field of your Windows shortcut.
+
+|               |                                                       |
+| ------------- | ----------------------------------------------------- |
+| `/nitro`      | Increase the file limit to 500Mo                      |
+| `/nitrobasic` | Increase the file limit to 50Mo                       |
+|               |                                                       |
+| `/nvenc_h264` | Enable NVenc with H.264 encoder (NVidia GPU required) |
+| `/nvenc_h265` | Enable NVenc with H.265 encoder (NVidia GPU required) |
+| `/h265`       | Enable the H.265 CPU encoder (slow compression)       |
+
+> NVenc support is experimental, but faster than CPU counterparts.
+
+## More info
+
+- [x] KISS interface
+  - [x] Support drag&drop into the icon
+- [x] Keep the video under discord limitation
+  - [x] Defaults to H.264 CPU encoder
   - [x] If already under the limit, the file won't be compressed
-- [x] Merge all audio files into one track, while keeping the original ones
+  - [x] NVenc support
+  - [x] Nitro suppport
+- [x] Merge 2 audio files into one track when recorded with system audio and microphone
+      split up, while keeping the original ones (with conveniant metadata)
+  - [x] Works also with file with only one or more than 2 audio track, by doing
+        nothing
+- [x] Support multiples files at once
+- [x] Always optimize for video streaming
 
 ## Package the app for Windows
 

install.ps1

@@ -0,0 +1,51 @@
+param (
+  [switch]$Force
+)
+
+# Enable TLSv1.2 for compatibility with older windows versions
+[Net.ServicePointManager]::SecurityProtocol = [Net.ServicePointManager]::SecurityProtocol -bor [Net.SecurityProtocolType]::Tls12
+
+$path = "$env:LOCALAPPDATA\DSR"
+$update = Test-Path -Path $path\*
+
+# Download
+$releases = "https://git.mylloon.fr/api/v1/repos/Anri/dsr/releases/latest"
+$link = (Invoke-WebRequest $releases | ConvertFrom-Json)[0].assets.browser_download_url
+$archive = "$env:TEMP\dsr.zip"
+Invoke-WebRequest -Uri $link -OutFile $archive
+Remove-Item "$path" -Recurse -ErrorAction SilentlyContinue
+
+# Close running DSR
+Stop-Process -Name "DSR" -Force -ErrorAction SilentlyContinue
+
+# Installation
+Expand-Archive -Path $archive -DestinationPath "$path" -Force
+Move-Item -Path "$path\dsr-win32-x64\*" -Destination "$path" -Force
+Remove-Item "$path\dsr-win32-x64"
+
+# Ask user to add a shortcut to the desktop
+if (-not $update -Or $Force) {
+  # Add shortcut
+  $WshShell = New-Object -comObject WScript.Shell
+  $Shortcut = $WshShell.CreateShortcut("$env:APPDATA\Microsoft\Windows\Start Menu\Programs\DSR.lnk")
+  $Shortcut.TargetPath = "$path\dsr.exe"
+  $Shortcut.Save()
+
+  # Add new app to registry
+  REG ADD "HKCU\Software\Microsoft\Windows\CurrentVersion\Uninstall\dsr" /f /v DisplayName /t REG_SZ /d "DSR"
+  REG ADD "HKCU\Software\Microsoft\Windows\CurrentVersion\Uninstall\dsr" /f /v InstallLocation /t REG_SZ /d "$path"
+
+  if ($Host.UI.PromptForChoice(
+    "***********************",
+    "Add a desktop shortcut?",
+    @(
+      [System.Management.Automation.Host.ChoiceDescription]::new("&Yes", "Add a shortcut to your desktop.")
+      [System.Management.Automation.Host.ChoiceDescription]::new("&No", "Skip the shortcut creation.")
+    ), 1) -eq 0) {
+    $WshShell = New-Object -comObject WScript.Shell
+    $Desktop = [Environment]::GetFolderPath("Desktop")
+    $Shortcut = $WshShell.CreateShortcut("$Desktop\DSR.lnk")
+    $Shortcut.TargetPath = "$path\dsr.exe"
+    $Shortcut.Save()
+  }
+}

package.json

@@ -1,6 +1,6 @@
 {
   "name": "dsr",
-  "version": "1.2.0",
+  "version": "1.11.2",
   "description": "Discord Video Sharing",
   "main": "./dist/main.js",
   "scripts": {
@@ -18,20 +18,23 @@
   "author": "Mylloon",
   "license": "AGPL-3.0-or-later",
   "dependencies": {
-    "@electron-forge/maker-zip": "^6.2.1",
-    "ffmpeg-static": "^5.1.0",
-    "ffprobe-static": "^3.1.0",
-    "typescript": "^5.1.6"
+    "@electron-forge/maker-zip": "^7.5",
+    "ffmpeg-static": "^5.2",
+    "ffprobe-static": "^3.1",
+    "typescript": "^5.6"
   },
   "devDependencies": {
-    "@electron-forge/cli": "^6.2.1",
-    "@types/ffprobe-static": "^2.0.1",
-    "electron": "^25.3.2"
+    "@electron-forge/cli": "^7.5",
+    "@types/ffprobe-static": "^2.0",
+    "electron": "^33.0"
   },
   "config": {
     "forge": {
       "packagerConfig": {
-        "icon": "./image/icon.ico"
+        "icon": "./image/icon.ico",
+        "asar": {
+          "unpack": "**/node_modules/*-static/**"
+        }
       },
       "makers": [
         {

src/main.ts

@@ -1,19 +1,40 @@
-import { BrowserWindow, app, dialog, ipcMain } from "electron";
-import { statSync, unlink } from "fs";
+import { app, BrowserWindow, dialog, ipcMain, Notification } from "electron";
+import { statSync, copyFileSync } from "fs";
 import {
+  deleteFile,
+  deleteTwoPassFiles,
   execute,
   getNewFilename,
   getVideoDuration,
+  getNumberOfAudioTracks,
   printAndDevTool,
+  processes,
 } from "./utils/misc";
 import path = require("path");
-import ffmpegPath = require("ffmpeg-static");
+
+import ffmpeg = require("ffmpeg-static");
+const ffmpegPath = `${ffmpeg}`.replace("app.asar", "app.asar.unpacked");
+
+let error = false;
 
 const moviesFilter = {
   name: "Videos",
   extensions: ["mp4", "mkv"],
 };
 
+const metadataAudioSize = 3;
+const metadataAudio = `-metadata:s:a:0 title="System sounds and microphone" \
+                       -metadata:s:a:1 title="System sounds" \
+                       -metadata:s:a:2 title="Microphone"`;
+
+const shareOpt = "-movflags +faststart";
+
+/** Register a new error  */
+const registerError = (win: BrowserWindow, err: string) => {
+  error = true;
+  printAndDevTool(win, err);
+};
+
 /** Create a new window */
 const createWindow = () => {
   const win = new BrowserWindow({
@@ -31,72 +52,193 @@ const createWindow = () => {
   return win;
 };
 
+// For notification on Windows
+if (process.platform === "win32") {
+  app.setAppUserModelId(app.name);
+}
+
 /* Ready to create the window */
 app.whenReady().then(() => {
   const win = createWindow();
 
-  /** Ask user a file */
-  const askFile = () => {
+  /** Ask user files */
+  const askFiles = () => {
     return dialog.showOpenDialogSync(win, {
       filters: [moviesFilter],
-      properties: ["openFile", "dontAddToRecent"],
+      properties: ["openFile", "dontAddToRecent", "multiSelections"],
     });
   };
 
   /** Send confirmation to user */
   const confirmation = async (message: string) => {
+    // Send notification
+    new Notification({
+      title: "Status",
+      body: message,
+    }).show();
+
+    // Open dialog
     await dialog.showMessageBox(win, { message });
   };
 
-  /** Merge all audios track of a video into one */
+  /** Get filename of a path */
+  const getFilename = (filepath: string) => path.parse(filepath).base;
+
+  /** Merge all audios track of a video into one
+   *  In case video doesn't have exactly two audio streams, silently pass */
   const mergeAudio = async (file: string) => {
     const tmpFile = getNewFilename(file, "TMP_");
-    const outFile = getNewFilename(file, "(merged audio) ");
+    let outFile;
 
+    let audioTracks = getNumberOfAudioTracks(file);
+
+    switch (audioTracks.length) {
+      case 2:
         // 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 1 -map 0:v -map "[a]" -c:v copy "${tmpFile}"`
-    ).catch((e) => printAndDevTool(win, e));
+          `"${ffmpegPath}" -y \
+           -i "${file}" \
+           -filter_complex "[0:a]amerge=inputs=2[a]" -ac 2 -map 0:v -map "[a]" \
+           -c:v copy \
+           "${tmpFile}"`
+        );
 
-    // Add merged audio as first position to original video
+        outFile = getNewFilename(file, "(merged audio) ");
+
+        // Add merged audio as first position to original video and make it default
+        // About disposition: https://ffmpeg.org/ffmpeg.html#Main-options
+        // Also rename all tracks accordingly to what they are
         await execute(
-      `"${ffmpegPath}" -y -i "${tmpFile}" -i "${file}" -map 0 -map 1:a -c:v copy "${outFile}"`
-    ).catch((e) => printAndDevTool(win, e));
+          `"${ffmpegPath}" -y \
+         -i "${tmpFile}" -i "${file}" \
+         -map 0 -map 1:a -c:v copy \
+         -disposition:a 0 -disposition:a:0 default \
+         ${metadataAudio} \
+         "${outFile}"`
+        ).catch((e) => registerError(win, e));
 
-    // Delete the temporary file
-    unlink(tmpFile, (err) => {
-      if (err) {
-        throw err;
+        // Delete the temporary video file
+        deleteFile(tmpFile);
+
+        audioTracks = getNumberOfAudioTracks(outFile);
+
+        break;
+      default:
+        // Other cases: no merge needed
+        outFile = getNewFilename(file, "(nomerge) ");
+
+        // Do a copy
+        copyFileSync(file, outFile);
+        break;
     }
-    });
 
     const duration = getVideoDuration(outFile);
     const stats = statSync(outFile);
 
-    return { title: outFile, size: stats.size / 1024 / 1024, duration };
+    return {
+      title: outFile,
+      size: stats.size / 1024 / 1024,
+      duration,
+      audioTracks,
+    };
   };
 
-  /* Reduce size of a file */
-  const reduceSize = async (file: string, bitrate: number) => {
-    const audioBitrate = 400; // keep some room
+  /** Reduce size of a file
+   * Returns an empty string in case of failing
+   */
+  const reduceSize = async (
+    file: string,
+    bitrate: number,
+    audioTracks: number[]
+  ) => {
+    const audioBitrate = Math.ceil(
+      audioTracks.reduce((sum, current) => current + sum, 50) // initial value > 0 for extra room
+    );
     const videoBitrate = bitrate - audioBitrate;
+    let finalFile;
 
-    const finalFile = getNewFilename(file, "Compressed - ");
+    if (videoBitrate > 0) {
+      finalFile = getNewFilename(file, "Compressed - ");
 
       // Trash the output, depends on the platform
       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}"`
-    ).catch((e) => printAndDevTool(win, e));
+      // Mapping of tracks for FFMPEG, adding 1 for the video stream
+      const mappingTracks = Array(audioTracks.length + 1)
+        .fill("-map 0:")
+        .map((str, index) => {
+          return str + index;
+        })
+        .join(" ");
 
-    // Delete the old file
-    unlink(file, (err) => {
-      if (err) {
-        throw err;
+      let codec = "libx264";
+      let hwAcc = "";
+
+      const argv = process.argv;
+      if (argv.includes("/nvenc_h264")) {
+        // Use NVenc H.264
+        codec = "h264_nvenc";
+        hwAcc = "-hwaccel cuda";
       }
-    });
+
+      if (argv.includes("/nvenc_h265")) {
+        // Use NVenc H.265
+        codec = "hevc_nvenc";
+        hwAcc = "-hwaccel cuda";
+      }
+
+      if (argv.includes("/h265")) {
+        // Use H.265 encoder
+        codec = "libx265";
+      }
+
+      // Compress the video
+      // Add metadata to audio's track
+      await execute(
+        `"${ffmpegPath}" -y ${hwAcc} \
+       -i "${file}" \
+       -c:v ${codec} -b:v ${videoBitrate}k -pass 1 -an -f mp4 \
+       ${nul} \
+       && \
+       "${ffmpegPath}" -y ${hwAcc} \
+       -i "${file}" \
+       -c:v ${codec} -b:v ${videoBitrate}k -pass 2 -c:a copy \
+       ${mappingTracks} -f mp4 \
+       -profile:v main \
+       ${audioTracks.length === metadataAudioSize ? metadataAudio : ""} \
+       ${shareOpt} \
+       "${finalFile}"`
+      ).catch((e) => registerError(win, e));
+
+      // Delete the 2 pass temporary files
+      deleteTwoPassFiles(process.cwd());
+    } else {
+      finalFile = "";
+    }
+
+    // Delete the old video file
+    deleteFile(file);
+
+    return finalFile;
+  };
+
+  /** Move metadata at the begenning of the file */
+  const moveMetadata = async (file: string, nbTracks: number) => {
+    const finalFile = getNewFilename(file, "Broadcastable - ");
+
+    // Optimize for streaming
+    await execute(
+      `"${ffmpegPath}" -y \
+       -i "${file}" \
+       -map 0 -codec copy \
+       ${shareOpt} \
+       ${nbTracks === metadataAudioSize ? metadataAudio : ""} \
+       "${finalFile}"`
+    ).catch((e) => registerError(win, e));
+
+    // Delete the old video file
+    deleteFile(file);
 
     return finalFile;
   };
@@ -104,11 +246,25 @@ app.whenReady().then(() => {
   /* Context bridge */
   ipcMain.handle("argv", () => process.argv);
   ipcMain.handle("allowedExtensions", () => moviesFilter);
-  ipcMain.handle("askFile", () => askFile());
+  ipcMain.handle("getFilename", (_, filepath: string) => getFilename(filepath));
+  ipcMain.handle("askFiles", () => askFiles());
   ipcMain.handle("mergeAudio", (_, file: string) => mergeAudio(file));
-  ipcMain.handle("reduceSize", (_, file: string, bitrate: number) =>
-    reduceSize(file, bitrate)
+  ipcMain.handle(
+    "reduceSize",
+    (_, file: string, bitrate: number, audioTracks: number[]) =>
+      reduceSize(file, bitrate, audioTracks)
   );
-  ipcMain.handle("exit", () => app.quit());
+  ipcMain.handle("moveMetadata", (_, file: string, nbTracks: number) =>
+    moveMetadata(file, nbTracks)
+  );
+  ipcMain.handle("exit", () => (error ? {} : app.quit()));
   ipcMain.handle("confirmation", (_, text: string) => confirmation(text));
 });
+
+app.on("window-all-closed", () => {
+  processes.forEach((process) => {
+    process.stdin.write("q");
+  });
+
+  app.quit();
+});

src/preload.ts

@@ -1,13 +1,22 @@
 import { contextBridge, ipcRenderer } from "electron";
 
+/* Log errors */
+ipcRenderer.on("error", (_, err) => {
+  console.error(err);
+});
+
 /* Context bridge */
 contextBridge.exposeInMainWorld("internals", {
   argv: () => ipcRenderer.invoke("argv"),
   allowedExtensions: () => ipcRenderer.invoke("allowedExtensions"),
-  askFile: () => ipcRenderer.invoke("askFile"),
+  getFilename: (filepath: string) =>
+    ipcRenderer.invoke("getFilename", filepath),
+  askFiles: () => ipcRenderer.invoke("askFiles"),
   mergeAudio: (file: string) => ipcRenderer.invoke("mergeAudio", file),
-  reduceSize: (file: string, bitrate: number) =>
-    ipcRenderer.invoke("reduceSize", file, bitrate),
+  reduceSize: (file: string, bitrate: number, audioTracks: number[]) =>
+    ipcRenderer.invoke("reduceSize", file, bitrate, audioTracks),
+  moveMetadata: (file: string, nbTracks: number) =>
+    ipcRenderer.invoke("moveMetadata", file, nbTracks),
   exit: () => ipcRenderer.invoke("exit"),
   confirmation: (text: string) => ipcRenderer.invoke("confirmation", text),
 });

src/scripts/renderer.ts

@@ -4,31 +4,68 @@ let internals: {
   allowedExtensions: () => Promise<{
     extensions: string[];
   }>;
-  askFile: () => Promise<string[] | undefined>;
+  getFilename: (filepath: string) => Promise<string>;
+  askFiles: () => Promise<string[] | undefined>;
   exit: () => Promise<void>;
-  mergeAudio: (
-    filename: string
-  ) => Promise<{ title: string; duration: number; size: number }>;
-  reduceSize: (file: string, bitrate: number) => Promise<string>;
+  mergeAudio: (filename: string) => Promise<{
+    title: string;
+    duration: number;
+    size: number;
+    audioTracks: number[];
+  }>;
+  reduceSize: (
+    file: string,
+    bitrate: number,
+    audioTracks: number[]
+  ) => Promise<string>;
+  moveMetadata: (file: string, nbTracks: number) => Promise<string>;
   confirmation: (text: string) => Promise<void>;
 };
 
-/** Search for a file */
-const getFile = async () => {
+/** Search for files */
+const getFiles = async () => {
   const allowedExtensions = (await internals.allowedExtensions()).extensions;
-  const argv = await internals.argv();
-  if (argv.length === 2) {
-    const file = argv.pop();
-    if (allowedExtensions.some((ext) => file.endsWith(ext))) {
-      return file;
-    }
-  }
+  const argvFiles = (await internals.argv())
+    .slice(1)
+    .filter((element) => !element.startsWith("/"));
 
-  const file = await internals.askFile();
-  if (file === undefined || file.length === 0) {
+  if (argvFiles.length > 0) {
+    const files = argvFiles;
+
+    // Exit if a file isn't supported in the list
+    if (
+      files.filter((file) =>
+        allowedExtensions.some((ext) =>
+          file.toLowerCase().endsWith(ext.toLowerCase())
+        )
+      ).length !== files.length
+    ) {
       await internals.exit();
     }
-  return file.join("");
+
+    return files;
+  }
+
+  const files = await internals.askFiles();
+  if (files === undefined || files.length === 0) {
+    await internals.exit();
+  }
+  return files;
+};
+
+/** Returns maximum allowed size for files in MB */
+const fetchMaxSize = async () => {
+  const argv = await internals.argv();
+  if (argv.includes("/nitrobasic")) {
+    // Nitro Basic user
+    return 50;
+  } else if (argv.includes("/nitro")) {
+    // Nitro user
+    return 500;
+  } else {
+    // Free user
+    return 10;
+  }
 };
 
 /** Either replace the message, or add some info */
@@ -62,13 +99,27 @@ const updateMessage = (
 
 /** Main function */
 const main = async () => {
-  const maxSizeDiscord = 25;
-  updateMessage("Récupération du fichier...");
-  const file = await getFile();
-  updateMessage("Mélange des pistes audios vers la piste 1...", true);
+  const maxSizeDiscord = await fetchMaxSize();
+  updateMessage("Récupération des fichiers...");
+  const files = await getFiles();
+  let processedFiles = "";
+  let numberOfUncompressableFiles = 0;
+
+  // Iterate over all the retrieved files
+  for (const [idx, file] of files.entries()) {
+    const counter = `${idx + 1}/${files.length}`;
+    const filename = await internals.getFilename(file);
+    updateMessage(
+      `${counter} - Mélange des pistes audios de ${filename}...`,
+      true
+    );
     const newFile = await internals.mergeAudio(file);
     let finalTitle = newFile.title;
-  updateMessage(`Taille calculée : ~${Math.round(newFile.size)}Mio`);
+    updateMessage(
+      `${counter} - Taille calculée : ~${Math.round(newFile.size)}Mio`
+    );
+
+    // Compress video if needed
     if (newFile.size > maxSizeDiscord) {
       const targetSize = maxSizeDiscord - 2; // keep some room
 
@@ -80,10 +131,45 @@ const main = async () => {
         true,
         Mode.Append
       );
-    finalTitle = await internals.reduceSize(newFile.title, bitrate);
+
+      // Compress the video and change the title to the new one
+      finalTitle = await internals.reduceSize(
+        newFile.title,
+        bitrate,
+        newFile.audioTracks
+      );
+    } else {
+      updateMessage(`\nPréparation pour le partage...`, true, Mode.Append);
+
+      // Move the metadata to make it playable before everything is downloaded
+      finalTitle = await internals.moveMetadata(
+        newFile.title,
+        newFile.audioTracks.length
+      );
     }
-  updateMessage("Fichier prêt ! :)");
-  await internals.confirmation(`File ok @ ${finalTitle}!`);
+
+    // Append title to the list of processed files
+    if (finalTitle.length > 0) {
+      processedFiles += `\n- ${finalTitle}`;
+      updateMessage(`Fichier ${counter} traités.`);
+    } else {
+      processedFiles += `\n- ${file} [incompressable]`;
+      updateMessage(`Fichier ${counter} trop large pour être compressé.`);
+      numberOfUncompressableFiles++;
+    }
+  }
+
+  let errorMessage = "";
+  if (numberOfUncompressableFiles > 0) {
+    errorMessage += `\nNombre de fichier incompressable : ${numberOfUncompressableFiles}.`;
+  }
+
+  // Send confirmation to the user that we're done
+  await internals.confirmation(
+    `${files.length} fichiers traités : ${processedFiles}` + errorMessage
+  );
+
   await internals.exit();
 };
+
 main();

src/utils/misc.ts

@@ -1,7 +1,12 @@
-import ffprobe = require("ffprobe-static");
 import child_process = require("child_process");
 import path = require("path");
 import { BrowserWindow } from "electron";
+import { existsSync, unlink } from "fs";
+
+import ffprobe = require("ffprobe-static");
+const ffprobePath = ffprobe.path.replace("app.asar", "app.asar.unpacked");
+
+export const processes: child_process.ChildProcess[] = [];
 
 /** Create a new filename from the OG one */
 export const getNewFilename = (ogFile: string, part: string) => {
@@ -11,26 +16,65 @@ export const getNewFilename = (ogFile: string, part: string) => {
 
 /** Return the duration of a video in second */
 export const getVideoDuration = (file: string) => {
-  const command = `"${ffprobe.path}" -v error -show_entries format=duration -of default=noprint_wrappers=1:nokey=1 "${file}"`;
+  const command = `"${ffprobePath}" -v error -show_entries format=duration -of default=noprint_wrappers=1:nokey=1 "${file}"`;
   const durationString = child_process.execSync(command).toString().trim();
   return parseFloat(durationString);
 };
 
+/** Return the number of audio tracks */
+export const getNumberOfAudioTracks = (file: string): number[] => {
+  const command = `"${ffprobePath}" -v error -show_entries stream=bit_rate -select_streams a -of json "${file}"`;
+  const result = child_process.execSync(command, { encoding: "utf8" });
+  return JSON.parse(result).streams.map(
+    (v: { bit_rate: string }) => Number(v.bit_rate) / 1000
+  );
+};
+
 /** Print an error to the console and open the dev tool panel */
-export const printAndDevTool = (win: BrowserWindow, error: string) => {
-  console.error(error);
+export const printAndDevTool = (win: BrowserWindow, err: string) => {
   win.webContents.openDevTools();
+  win.webContents.send("error", err);
 };
 
 /** Run a command asynchronously */
-export const execute = (command: string) => {
+export const execute = (
+  command: string
+): Promise<{ stdout: string; stderr: string }> => {
   return new Promise((resolve, reject) => {
-    child_process.exec(command, (error, stdout, stderr) => {
+    const process = child_process.exec(command, (error, stdout, stderr) => {
       if (error) {
         reject(error);
       } else {
         resolve({ stdout, stderr });
       }
     });
+
+    processes.push(process);
+    process.on("exit", () => {
+      processes.splice(processes.indexOf(process), 1);
+    });
   });
 };
+
+/** Delete a file */
+export const deleteFile = (file: string) => {
+  unlink(file, (err) => {
+    if (err) {
+      throw err;
+    }
+  });
+};
+
+/** Delete the 2pass files generated by ffmpeg */
+export const deleteTwoPassFiles = (directory: string) => {
+  const logFile = path.join(directory, "ffmpeg2pass-0.log");
+
+  if (existsSync(logFile)) {
+    deleteFile(logFile);
+  }
+
+  const mbtreeFile = path.join(directory, "ffmpeg2pass-0.log.mbtree");
+  if (existsSync(mbtreeFile)) {
+    deleteFile(mbtreeFile);
+  }
+};

tsconfig.json

@@ -1,6 +1,7 @@
 {
   "compilerOptions": {
     "module": "commonjs",
+    "downlevelIteration": true,
     "noImplicitAny": true,
     "sourceMap": true,
     "outDir": "dist",