fix: when you set jpegThumbnail, image not appear on app mobile

[Faelst]

📦 Pull Request — Fix video thumbnail handling on mobile apps

Context

Currently, when sending videos through the API, setting the jpegThumbnail manually (e.g., using a local image file like video-cover.png) was not showing any thumbnail preview on mobile WhatsApp applications.

After investigating, it was observed that:

• WhatsApp expects a correctly sized, compressed, and proper JPEG format thumbnail.
• Simply attaching any PNG-converted image as jpegThumbnail without proper optimization causes the thumbnail to be ignored silently on mobile devices.

---

What has changed

• Removed setting jpegThumbnail manually from static images.
• Set gifPlayback = false for all video media messages (keeping consistent behavior between web and mobile apps).

Now, the native behavior of WhatsApp handles thumbnails better when jpegThumbnail is not manually set incorrectly.

---

How it was fixed

if (mediaMessage.mediatype === 'video') {
  prepareMedia[mediaType].gifPlayback = false;
}

No longer trying to inject a static jpegThumbnail.

---

Impact

• Fixes videos sent through the API not showing thumbnails on mobile apps.
• Makes API behavior more aligned with WhatsApp mobile/web expectations.
• Reduces chance of future media handling bugs related to thumbnail encoding.

---

Related

• Commit: fix: when you set jpegThumbnail, image not appear on app mobile

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✅ Now videos sent through the API show the proper behavior on both WhatsApp Web and WhatsApp Mobile.

Summary by Sourcery

Fix video thumbnail handling for WhatsApp media messages to ensure proper thumbnail display on mobile apps

New Features:

• Ensured consistent video thumbnail behavior across WhatsApp Web and Mobile platforms

Bug Fixes:

• Resolved issue with video thumbnails not appearing on mobile WhatsApp applications
• Removed manual thumbnail injection that was causing thumbnail preview failures

Enhancements:

• Improved media message handling to align with WhatsApp mobile and web expectations
• Simplified thumbnail processing for video messages

[sourcery-ai]

Reviewer's Guide

This pull request fixes missing video thumbnails on mobile apps by removing the code that manually set the jpegThumbnail property from a static image file, allowing the platform's native thumbnail generation to function correctly.

File-Level Changes

Change	Details	Files
Removed manual video thumbnail setting	Deleted code assigning a static image file to the jpegThumbnail property for video messages. Ensured gifPlayback remains false for videos (no code change, but relevant context).	src/api/integrations/channel/whatsapp/whatsapp.baileys.service.ts

Possibly linked issues

• #0: PR removes incorrect manual jpegThumbnail setting fixing issue of missing video thumbnails on mobile when auto-download is disabled.

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[sourcery-ai]

Hey @Faelst - I've reviewed your changes and they look great!

Here's what I looked at during the review

• 🟢 General issues: all looks good
• 🟢 Security: all looks good
• 🟢 Testing: all looks good
• 🟢 Documentation: all looks good

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[Faelst]

Issue related: #1385