Function shouldUseVp9AlphaDecoder

packages/cli/src/commands/snapshot.ts:390–399

(filePath: string)

      }
      const alphaDecoderCache = new Map<string, Promise<boolean>>();
      const shouldUseVp9AlphaDecoder = (filePath: string): Promise<boolean> => {
        if (!extractMediaMetadata) return Promise.resolve(false);
        const cached = alphaDecoderCache.get(filePath);
        if (cached) return cached;
        const pending = extractMediaMetadata(filePath)
          .then((meta) => meta.hasAlpha && meta.videoCodec === "vp9")
          .catch(() => false);
        alphaDecoderCache.set(filePath, pending);
        return pending;
      };

      const hasPlayer = await page.evaluate(() => !!(window as any).__player);
      if (!hasPlayer) {