1. What is the MP4 Size Calculation?

The MP4 size calculation estimates the file size of an MP4 video based on its bitrate and duration. This is useful for storage planning, bandwidth estimation, and video production.

2. How Does the Calculator Work?

The calculator uses the basic formula:

Where:

• \( Bitrate \) — Video bitrate in bits per second
• \( Duration \) — Video length in seconds
• \( 8 \) — Conversion factor from bits to bytes

Explanation: The formula calculates the raw data size. Actual file size may vary slightly due to container overhead and compression efficiency.

3. Importance of File Size Calculation

Details: Knowing the estimated file size helps in planning storage requirements, upload times, and bandwidth needs for video distribution.

4. Using the Calculator

Tips: Enter the video bitrate in bits per second (common values range from 1Mbps for low quality to 50Mbps for 4K) and duration in seconds. All values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: Why divide by 8 in the formula?
A: The division converts bits to bytes (1 byte = 8 bits), since file sizes are typically measured in bytes.

Q2: Does this account for audio track size?
A: No, this calculates video size only. For complete file size, add audio bitrate × duration / 8.

Q3: What's a typical bitrate for 1080p video?
A: Common bitrates range from 4-8 Mbps for 1080p at 30fps, depending on quality requirements.

Q4: How accurate is this estimate?
A: It provides a good approximation, but actual size may vary by 5-10% due to container overhead and compression efficiency.

Q5: Can I calculate for other units like MB or GB?
A: Yes, divide the result by 1,048,576 for MB or 1,073,741,824 for GB.