Add ffmpeg integration tests and fix pipe argument

Author: richiemcilroy

apps/media-server/src/__tests__/fixtures/test-no-audio.mp4

@@ -0,0 +1,41 @@
+import { describe, expect, test } from "bun:test";
+import { join } from "node:path";
+import { checkHasAudioTrack, extractAudio } from "../../lib/ffmpeg";
+
+const FIXTURES_DIR = join(import.meta.dir, "..", "fixtures");
+const TEST_VIDEO_WITH_AUDIO = `file://${join(FIXTURES_DIR, "test-with-audio.mp4")}`;
+const TEST_VIDEO_NO_AUDIO = `file://${join(FIXTURES_DIR, "test-no-audio.mp4")}`;
+
+describe("ffmpeg integration tests", () => {
+	describe("checkHasAudioTrack", () => {
+		test("detects audio track in video with audio", async () => {
+			const hasAudio = await checkHasAudioTrack(TEST_VIDEO_WITH_AUDIO);
+			expect(hasAudio).toBe(true);
+		});
+
+		test("detects no audio track in video without audio", async () => {
+			const hasAudio = await checkHasAudioTrack(TEST_VIDEO_NO_AUDIO);
+			expect(hasAudio).toBe(false);
+		});
+	});
+
+	describe("extractAudio", () => {
+		test("extracts audio from video with audio track", async () => {
+			const audioData = await extractAudio(TEST_VIDEO_WITH_AUDIO);
+
+			expect(audioData).toBeInstanceOf(Uint8Array);
+			expect(audioData.length).toBeGreaterThan(0);
+
+			const hasFtypBox =
+				audioData[4] === 0x66 &&
+				audioData[5] === 0x74 &&
+				audioData[6] === 0x79 &&
+				audioData[7] === 0x70;
+			expect(hasFtypBox).toBe(true);
+		});
+
+		test("throws error for video without audio track", async () => {
+			await expect(extractAudio(TEST_VIDEO_NO_AUDIO)).rejects.toThrow();
+		});
+	});
+});

apps/media-server/src/__tests__/fixtures/test-with-audio.mp4

@@ -46,7 +46,7 @@ export async function extractAudio(
 		"ipod",
 		"-movflags",
 		"+frag_keyframe+empty_moov",
-		"-pipe:1",
+		"pipe:1",
 	];
 
 	console.log(`[ffmpeg] Starting audio extraction: ${ffmpegArgs.join(" ")}`);
@@ -93,7 +93,7 @@ export async function extractAudioStream(
 		"ipod",
 		"-movflags",
 		"+frag_keyframe+empty_moov",
-		"-pipe:1",
+		"pipe:1",
 	];
 
 	console.log(