Merge pull request #20 from theoleuthardt/feat/video-to-audio

feat: video-to-audio

backend/server.ts

@@ -8,6 +8,7 @@ import { regexTest } from "./src/routes/regextest.route";
 import { tmzConvert } from "./src/routes/tmzconvert.route";
 import { generateQRCode } from "./src/routes/generateqrcode.route";
 import { wordCounter } from "./src/routes/wordcounter.route";
+import { videoToAudio } from "./src/routes/videotoaudio.route";
 import { removeBG } from "./src/routes/removebg.route";
 
 const app = Fastify({ logger: true });
@@ -26,6 +27,7 @@ app.register(regexTest);
 app.register(tmzConvert);
 app.register(generateQRCode);
 app.register(wordCounter);
+app.register(videoToAudio);
 app.register(removeBG);
 
 const PORT = process.env.PORT || 4000;

backend/src/routes/videotoaudio.route.ts

@@ -0,0 +1,148 @@
+import { FastifyInstance, FastifyReply, FastifyRequest } from "fastify";
+import { MultipartValue } from "@fastify/multipart";
+import { spawn } from "child_process";
+import { promises as fs } from "fs";
+import * as path from "path";
+import { randomUUID } from "crypto";
+
+interface ConversionOptions {
+  format: string;
+  bitrate?: string;
+  channels?: number;
+  sampleRate?: number;
+}
+let options: ConversionOptions;
+
+const ffmpegEncoder: { [key: string]: string } = {
+  ".mp3": "libmp3lame",
+  ".wav": "pcm_s16le",
+  ".aac": "aac",
+};
+
+export async function videoToAudio(app: FastifyInstance) {
+  app.post(
+    "/api/video-to-audio",
+    async (request: FastifyRequest, reply: FastifyReply) => {
+      const tmpDir = path.join(process.cwd(), "tmp");
+      const sessionId = randomUUID();
+      const inputPath = path.join(tmpDir, `input-${sessionId}`);
+      const outputPath = path.join(tmpDir, `output-${sessionId}`);
+
+      try {
+        await fs.mkdir(tmpDir, { recursive: true });
+
+        const parts = request.parts();
+
+        let fileBuffer: Buffer | null = null;
+        options = {
+          format: "",
+          bitrate: "192k",
+          channels: 2,
+          sampleRate: 44100,
+        };
+
+        for await (const part of parts) {
+          if (part.type === "file") {
+            fileBuffer = await part.toBuffer();
+          } else if (part.type === "field") {
+            const field = part as MultipartValue<string>;
+            switch (field.fieldname) {
+              case "outputFormat":
+                const format = field.value.toLowerCase();
+                options.format = format;
+                break;
+              case "bitrate":
+                options.bitrate = field.value;
+                break;
+              case "channels":
+                options.channels = parseInt(field.value, 10);
+                break;
+              case "sampleRate":
+                options.sampleRate = parseInt(field.value, 10);
+                break;
+            }
+          }
+        }
+
+        if (!fileBuffer) {
+          return reply.status(400).send({ error: "No file uploaded!" });
+        }
+
+        console.log("options", options);
+
+        await fs.writeFile(inputPath, fileBuffer);
+
+        await new Promise<void>((resolve, reject) => {
+          const args = [
+            "-i",
+            inputPath,
+            "-vn",
+            "-acodec",
+            ffmpegEncoder[options.format],
+            "-ab",
+            options.bitrate || "192k",
+            "-ac",
+            String(options.channels || 2),
+            "-ar",
+            String(options.sampleRate || 44100),
+            outputPath + "." + options.format,
+          ];
+
+          const ffmpeg = spawn("ffmpeg", args);
+
+          ffmpeg.stdout.on("data", (data) => {
+            console.log(`ffmpeg stdout: ${data}`);
+          });
+
+          ffmpeg.stderr.on("data", (data) => {
+            console.error(`ffmpeg stderr: ${data}`);
+          });
+
+          ffmpeg.on("close", (code) => {
+            if (code === 0) {
+              resolve();
+            } else {
+              reject(new Error(`ffmpeg process exited with code ${code}`));
+            }
+          });
+
+          ffmpeg.on("error", (err) => {
+            reject(err);
+          });
+        });
+
+        const outputFile = await fs.readFile(outputPath + "." + options.format);
+
+        await Promise.all([
+          fs.unlink(inputPath),
+          fs.unlink(outputPath + "." + options.format),
+        ]);
+
+        reply
+          .header("Content-Type", `audio/${options.format}`)
+          .header(
+            "Content-Disposition",
+            `attachment; filename="converted.${options.format}"`,
+          )
+          .send(outputFile);
+      } catch (error) {
+        try {
+          await Promise.all([
+            fs.unlink(inputPath).catch(() => {}),
+            fs
+              .unlink(outputPath + "." + (options?.format || "mp3"))
+              .catch(() => {}),
+          ]);
+        } catch (cleanupError) {
+          console.error("Cleanup error:", cleanupError);
+        }
+
+        console.error("Conversion error:", error);
+        reply.status(500).send({
+          error: "Error during conversion process",
+          details: error instanceof Error ? error.message : "Unknown error",
+        });
+      }
+    },
+  );
+}

backend/tsconfig.json

@@ -6,6 +6,6 @@
     "rootDir": ".",
     "strict": true,
     "esModuleInterop": true,
-    "allowSyntheticDefaultImports": true
+    "allowSyntheticDefaultImports": true,
   }
 }

frontend/src/app/video-to-audio/layout.tsx

@@ -0,0 +1,20 @@
+import React from "react";
+import type { Metadata } from "next";
+import { toolLinks } from "@/constants";
+
+export const metadata: Metadata = {
+  title: toolLinks[8].title,
+  description: "Video to audio converter!",
+};
+
+export default function RootLayout({
+  children,
+}: Readonly<{
+  children: React.ReactNode;
+}>) {
+  return (
+    <html lang="en">
+      <body className={`antialiased`}>{children}</body>
+    </html>
+  );
+}

frontend/src/app/video-to-audio/page.tsx

@@ -0,0 +1,178 @@
+"use client";
+import React, { useState } from "react";
+import Navbar from "../../components/Navbar";
+import Footer from "../../components/Footer";
+import Button from "../../components/Button";
+import { ChevronDown, ChevronUp } from "lucide-react";
+import Dropdown from "@/components/Dropdown";
+import { videoAudioFormats, videoAudioFormatsTable } from "@/constants";
+
+export default function DocConverter() {
+  const [file, setFile] = useState<File | null>(null);
+  const [loading, setLoading] = useState(false);
+  const [tableOpen, setTableOpen] = useState(false);
+  const [filteredOptions, setFilteredOptions] = useState<string[]>([]);
+  const [selectedOutputFormat, setSelectedOutputFormat] = useState<string | "">(
+    "",
+  );
+
+  const handleFileChange = (event: React.ChangeEvent<HTMLInputElement>) => {
+    event.preventDefault();
+
+    if (event.target.files && event.target.files.length > 0) {
+      const selectedFile = event.target.files[0];
+      const fileExtension = selectedFile.name.split(".").pop()?.toLowerCase();
+
+      const isSupported = videoAudioFormats.some((format) =>
+        format.input.toLowerCase().includes(fileExtension || ""),
+      );
+
+      if (!isSupported) {
+        alert("File format not supported!");
+        event.target.value = "";
+        return;
+      }
+
+      setFile(selectedFile);
+      setSelectedOutputFormat("");
+
+      const matchedFormat = videoAudioFormats.find((format) =>
+        format.input.toLowerCase().includes(fileExtension || ""),
+      );
+      setFilteredOptions(matchedFormat ? matchedFormat.output : []);
+    }
+  };
+
+  const convertVideo = async () => {
+    if (!file) {
+      alert("No file selected");
+      return;
+    }
+
+    const formData = new FormData();
+    formData.append("file", file);
+    formData.append("outputFormat", selectedOutputFormat);
+
+    setLoading(true);
+
+    try {
+      const response = await fetch(
+        process.env.backend_url + "/api/video-to-audio",
+        {
+          method: "POST",
+          body: formData,
+        },
+      );
+
+      if (!response.ok) {
+        console.error(`Error: ${response.statusText}`);
+        return;
+      }
+
+      const blob = await response.blob();
+      const url = window.URL.createObjectURL(blob);
+      const filename = file.name.split(".")[0];
+
+      const a = document.createElement("a");
+      a.href = url;
+      a.download = `${filename}${selectedOutputFormat}`;
+      document.body.appendChild(a);
+      a.click();
+      document.body.removeChild(a);
+
+      setTimeout(() => {
+        URL.revokeObjectURL(url);
+      }, 5000);
+    } catch (error) {
+      console.error("Error while converting:", error);
+      alert("Error while converting!");
+    } finally {
+      setLoading(false);
+    }
+  };
+
+  return (
+    <div className="w-screen h-auto min-h-screen bg-black text-white font-noto flex flex-col items-center">
+      <Navbar renderHomeLink={true} />
+      <div className="w-screen h-auto min-h-[calc(100vh-80px-60px)] flex flex-1 flex-col items-center justify-center">
+        <h2 className="text-5xl font-bold text-white mb-16">video-to-audio</h2>
+        <div className="h-36 flex flex-row items-center justify-center gap-4">
+          <input
+            type="file"
+            className="h-16 border-2 border-white p-3 rounded-xl text-2xl text-center text-white"
+            id="audioUpload"
+            onChange={handleFileChange}
+          />
+          <Dropdown
+            content={
+              file
+                ? `Convert to: ${selectedOutputFormat}`
+                : "output file format"
+            }
+            options={filteredOptions.length > 0 ? filteredOptions : [""]}
+            onClick={(event) => {
+              const selectedFormat =
+                event.currentTarget.textContent?.trim() || "";
+              setSelectedOutputFormat(selectedFormat);
+            }}
+          />
+        </div>
+        <div className={"flex flex-row items-center gap-4 mt-4 mb-16"}>
+          <Button
+            content={
+              loading ? (
+                <div className="h-10 w-10 border-8 border-blue-100 border-t-blue-500 rounded-full animate-spin" />
+              ) : (
+                "convert"
+              )
+            }
+            onClick={convertVideo}
+          />
+        </div>
+        <div className="overflow-hidden text-xl rounded-lg border border-white mb-16 transition-all duration-300 ease-in-out hover:border-blue-400">
+          <div
+            className="cursor-pointer flex justify-between items-center"
+            onClick={() => setTableOpen(!tableOpen)}
+          >
+            <table className="px-6 py-4 border-b">
+              <thead>
+                <tr className="border-b border-white">
+                  <th className="min-w-96 px-6 py-4 border-r border-white">
+                    📥 Input Format
+                  </th>
+                  <th className="min-w-[398px] px-6 py-4 flex flex-row justify-between items-center">
+                    <p className="pr-4 mx-auto">📤 Output Format</p>
+                    <div className="flex items-end justify-end place-content-end">
+                      {tableOpen ? (
+                        <ChevronUp className="h-6 w-6" />
+                      ) : (
+                        <ChevronDown className="h-6 w-6" />
+                      )}
+                    </div>
+                  </th>
+                </tr>
+              </thead>
+            </table>
+          </div>
+
+          <div
+            className={`
+          }overflow-hidden transition-all duration-700 ease-in-out ${tableOpen ? "max-h-[900px]" : "max-h-0"}`}
+          >
+            <table className="w-full h-auto text-left border-collapse border-white">
+              <tbody>
+                {videoAudioFormatsTable.map((format) => (
+                  <tr key={format.input} className="border-b">
+                    <td className="w-96 px-6 py-4 border-r">{format.input}</td>
+                    <td className="px-6 py-4">{format.output.join(", ")}</td>
+                  </tr>
+                ))}
+              </tbody>
+            </table>
+          </div>
+        </div>
+      </div>
+      <Footer className="flex justify-center items-end" />
+    </div>
+  );
+}

frontend/src/constants/index.ts

@@ -154,3 +154,33 @@ export const FileFormatsTable = [
     output: [".pdf", ".ppt", ".pptx"],
   },
 ];
+
+export const videoAudioFormats = [
+  {
+    input: ".mp4",
+    output: [".mp3", ".wav", ".aac"],
+  },
+  {
+    input: ".avi",
+    output: [".mp3", ".wav", ".aac"],
+  },
+  {
+    input: ".mov",
+    output: [".mp3", ".wav", ".aac"],
+  },
+];
+
+export const videoAudioFormatsTable = [
+  {
+    input: ".mp4 (MPEG-4)",
+    output: [".mp3", ".wav", ".aac"],
+  },
+  {
+    input: ".avi (Audio Video Interleave)",
+    output: [".mp3", ".wav", ".aac"],
+  },
+  {
+    input: ".mov (Apple QuickTime Movie)",
+    output: [".mp3", ".wav", ".aac"],
+  },
+];