138 lines
4 KiB
TypeScript
138 lines
4 KiB
TypeScript
import { BrowserWindow, app, dialog, ipcMain } from "electron";
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import { statSync } from "fs";
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import {
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deleteFile,
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deleteTwoPassFiles,
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execute,
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getNewFilename,
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getVideoDuration,
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printAndDevTool,
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} from "./utils/misc";
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import path = require("path");
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import ffmpegPath = require("ffmpeg-static");
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const moviesFilter = {
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name: "Videos",
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extensions: ["mp4", "mkv"],
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};
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const metadataAudio = `-metadata:s:a:0 title="System sounds and microphone" \
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-metadata:s:a:1 title="System sounds" \
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-metadata:s:a:2 title="Microphone"`;
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/** Create a new window */
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const createWindow = () => {
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const win = new BrowserWindow({
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width: 600,
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height: 340,
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icon: "./image/icon.ico",
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autoHideMenuBar: true,
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webPreferences: {
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preload: path.join(__dirname, "preload.js"),
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},
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});
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win.loadFile(path.join(path.resolve(__dirname, ".."), "pages", "index.html"));
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return win;
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};
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/* Ready to create the window */
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app.whenReady().then(() => {
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const win = createWindow();
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/** Ask user a file */
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const askFile = () => {
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return dialog.showOpenDialogSync(win, {
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filters: [moviesFilter],
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properties: ["openFile", "dontAddToRecent"],
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});
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};
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/** Send confirmation to user */
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const confirmation = async (message: string) => {
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await dialog.showMessageBox(win, { message });
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};
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/** Merge all audios track of a video into one */
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const mergeAudio = async (file: string) => {
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const tmpFile = getNewFilename(file, "TMP_");
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const outFile = getNewFilename(file, "(merged audio) ");
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// Merge 2 audio
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// See: https://trac.ffmpeg.org/wiki/AudioChannelManipulation#a2stereostereo
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await execute(
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`"${ffmpegPath}" -y \
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-i "${file}" \
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-filter_complex "[0:a]amerge=inputs=2[a]" -ac 2 -map 0:v -map "[a]" \
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-c:v copy \
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"${tmpFile}"`
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).catch((e) => printAndDevTool(win, e));
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// Add merged audio as first position to original video and make it default
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// About disposition: https://ffmpeg.org/ffmpeg.html#Main-options
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// Also rename all tracks accordingly to what they are
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await execute(
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`"${ffmpegPath}" -y \
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-i "${tmpFile}" -i "${file}" \
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-map 0 -map 1:a -c:v copy \
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-disposition:a 0 -disposition:a:0 default \
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${metadataAudio} \
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"${outFile}"`
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).catch((e) => printAndDevTool(win, e));
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// Delete the temporary video file
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deleteFile(tmpFile);
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const duration = getVideoDuration(outFile);
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const stats = statSync(outFile);
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return { title: outFile, size: stats.size / 1024 / 1024, duration };
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};
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/* Reduce size of a file */
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const reduceSize = async (file: string, bitrate: number) => {
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const audioBitrate = 400; // keep some room
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const videoBitrate = bitrate - audioBitrate;
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const finalFile = getNewFilename(file, "Compressed - ");
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// Trash the output, depends on the platform
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const nul = process.platform === "win32" ? "NUL" : "/dev/null";
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// Compress the video
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// Add metadata to audio's track
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await execute(
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`"${ffmpegPath}" -y \
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-i "${file}" \
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-c:v libx264 -b:v ${videoBitrate}k -pass 1 -an -f mp4 \
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${nul} \
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&& \
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"${ffmpegPath}" -y \
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-i "${file}" \
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-c:v libx264 -b:v ${videoBitrate}k -pass 2 -c:a copy \
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-map 0:0 -map 0:1 -map 0:2 -map 0:3 -f mp4 \
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${metadataAudio} \
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"${finalFile}"`
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).catch((e) => printAndDevTool(win, e));
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// Delete the old video file
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deleteFile(file);
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// Delete the 2 pass temporary files
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deleteTwoPassFiles(file);
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return finalFile;
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};
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/* Context bridge */
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ipcMain.handle("argv", () => process.argv);
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ipcMain.handle("allowedExtensions", () => moviesFilter);
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ipcMain.handle("askFile", () => askFile());
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ipcMain.handle("mergeAudio", (_, file: string) => mergeAudio(file));
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ipcMain.handle("reduceSize", (_, file: string, bitrate: number) =>
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reduceSize(file, bitrate)
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);
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ipcMain.handle("exit", () => app.quit());
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ipcMain.handle("confirmation", (_, text: string) => confirmation(text));
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});
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