Video Compress for Zalo

😫 The Pain Point

You recorded a 5-minute tutorial. It’s 500MB. Zalo limits files to 1GB, but Gmail is 25MB. Uploading 500MB on 4G data takes forever.

🚀 Agentic Solution

The Shrinker: Reduces bitrates while keeping resolution.

Key Features:

• Target Size: “Make this video under 25MB”.
• H.264: Standard compression compatible with all phones.

⚔️ Phase 1: Commander (Quick Fix)

For a single video.

Prompt:

“Compress video.mp4 to ensure it is smaller than 25MB (for Email). Use FFmpeg (via moviepy or subprocess).”

Result: Email-ready video.

🏗️ Phase 2: Architect (Permanent Tool)

For Office Communication.

Engineering Prompt:

**Role:** Python Multimedia Dev
**Task:** Create a "Video Size Reducer".
**Requirements:**
1.  **GUI:**
    *   Select Video.
    *   Select Target Platform (Email <25MB, Zalo <100MB).
    *   "Compress" button.
2.  **Logic:**
    *   Check original duration.
    *   Calculate Target Bitrate = (Target Size / Duration).
    *   Run FFmpeg command with calculated bitrate.
3.  **Deliverables:** `video_compress.py`, `run.bat` (Windows), `run.sh` (Mac).

🧠 Prompt Decoding

• Bitrate Math: File Size is not magic. It’s Bitrate * Duration. To hit a specific target size (e.g., 25MB), you must calculate the exact bitrate to tell the encoder. The “Architect” knows this formula.

🛠️ Instructions

1. Copy Prompt -> Paste -> Run.
2. Select File -> Target Email -> Compress.