Initial commit from Create Next App

2026-07-12 15:40:35 +02:00
commit 4f29120768
52 changed files with 10164 additions and 0 deletions
@@ -0,0 +1,100 @@
+import { spawn } from "child_process";
+import fs from "fs/promises";
+import path from "path";
+import { getResolution } from "../constants";
+import { getWatermarkPath } from "../storage";
+
+export async function encodeVideo(options: {
+  imagePath: string;
+  audioPath: string;
+  outputPath: string;
+  resolution: string;
+  includeWatermark: boolean;
+}): Promise<void> {
+  const res = getResolution(options.resolution);
+  if (!res) throw new Error(`Invalid resolution: ${options.resolution}`);
+
+  await fs.mkdir(path.dirname(options.outputPath), { recursive: true });
+
+  const scaleFilter = `scale=${res.width}:${res.height}:force_original_aspect_ratio=decrease,pad=${res.width}:${res.height}:(ow-iw)/2:(oh-ih)/2:black`;
+
+  const watermarkPath = getWatermarkPath();
+  let watermarkExists = false;
+  try {
+    await fs.access(watermarkPath);
+    watermarkExists = true;
+  } catch {
+    watermarkExists = false;
+  }
+
+  const useWatermark = options.includeWatermark && watermarkExists;
+
+  const args = ["-y", "-loop", "1", "-i", options.imagePath, "-i", options.audioPath];
+
+  if (useWatermark) {
+    args.push("-i", watermarkPath);
+    args.push(
+      "-filter_complex",
+      `[0:v]${scaleFilter}[scaled];[2:v]scale=iw*0.15:-1[wm];[scaled][wm]overlay=W-w-20:H-h-20[vout]`,
+      "-map",
+      "[vout]",
+      "-map",
+      "1:a",
+    );
+  } else if (options.includeWatermark && !watermarkExists) {
+    args.push(
+      "-filter_complex",
+      `[0:v]${scaleFilter},drawtext=text='s2yt':fontsize=24:fontcolor=white@0.7:x=w-tw-20:y=h-th-20[vout]`,
+      "-map",
+      "[vout]",
+      "-map",
+      "1:a",
+    );
+  } else {
+    args.push("-vf", scaleFilter);
+  }
+
+  args.push(
+    "-c:v",
+    "libx264",
+    "-tune",
+    "stillimage",
+    "-c:a",
+    "aac",
+    "-b:a",
+    "192k",
+    "-pix_fmt",
+    "yuv420p",
+    "-shortest",
+    options.outputPath,
+  );
+
+  await runFfmpeg(args);
+}
+
+function runFfmpeg(args: string[]): Promise<void> {
+  return new Promise((resolve, reject) => {
+    const proc = spawn("ffmpeg", args, { stdio: ["ignore", "pipe", "pipe"] });
+    let stderr = "";
+    proc.stderr.on("data", (chunk) => {
+      stderr += chunk.toString();
+    });
+    proc.on("close", (code) => {
+      if (code === 0) resolve();
+      else reject(new Error(`FFmpeg failed (code ${code}): ${stderr.slice(-500)}`));
+    });
+    proc.on("error", (err) => {
+      reject(new Error(`FFmpeg not found or failed to start: ${err.message}`));
+    });
+  });
+}
+
+export async function cleanupFiles(paths: string[]) {
+  for (const p of paths) {
+    try {
+      await fs.unlink(p);
+    } catch {
+      // ignore missing files
+    }
+  }
+}