fix: GenerateVideoThumbnail (#8825)

* fix: GenerateVideoThumbnail

* CHANGELOG

* fix cleanup

* Revert "fix cleanup"

This reverts commit d54cf8262ac01a3deb6b8dd7689ec144d4d09ea8.

CHANGELOG.md

@@ -9,6 +9,13 @@
 You should also include the user name that made the change.
 -->
 
+## 12.x.x (unreleased)
+
+### Improvements
+
+### Bugfixes
+- Fix GenerateVideoThumbnail failed @mei23
+
 ## 12.111.1 (2022/06/13)
 
 ### Bugfixes

packages/backend/src/services/drive/generate-video-thumbnail.ts

 import * as fs from 'node:fs';
-import * as path from 'node:path';
-import { createTemp } from '@/misc/create-temp.js';
+import { createTempDir } from '@/misc/create-temp.js';
 import { IImage, convertToJpeg } from './image-processor.js';
 import FFmpeg from 'fluent-ffmpeg';
 
 export async function GenerateVideoThumbnail(source: string): Promise<IImage> {
-	const [file, cleanup] = await createTemp();
-	const parsed = path.parse(file);
+	const [dir, cleanup] = await createTempDir();
 
 	try {
 		await new Promise((res, rej) => {
@@ -16,15 +14,15 @@ export async function GenerateVideoThumbnail(source: string): Promise<IImage> {
 			.on('end', res)
 			.on('error', rej)
 			.screenshot({
-				folder: parsed.dir,
-				filename: parsed.base,
+				folder: dir,
+				filename: 'out.png',	// must have .png extension
 				count: 1,
 				timestamps: ['5%'],
 			});
 		});
 
 		// JPEGに変換 (Webpでもいいが、MastodonはWebpをサポートせず表示できなくなる)
-		return await convertToJpeg(file, 498, 280);
+		return await convertToJpeg(`${dir}/out.png`, 498, 280);
 	} finally {
 		cleanup();
 	}