1. What is Video File Size Calculation?

The video file size calculation estimates the storage space required for a video based on its bitrate and duration. This is particularly important for 4K videos which typically have much higher bitrates than HD or SD videos.

2. How Does the Calculator Work?

The calculator uses the fundamental formula:

Where:

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

Explanation: The formula calculates the raw video size in bytes by multiplying the bitrate by duration and converting from bits to bytes.

3. Importance of Video Size Estimation

Details: Accurate size estimation helps in storage planning, bandwidth requirements for streaming, and determining recording limits for security cameras or other recording devices.

4. Using the Calculator

Tips: Enter bitrate in bits per second (for 4K video, typical values range from 15-50 Mbps or 15,000,000-50,000,000 bps) and duration in seconds. All values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: What's a typical bitrate for 4K video?
A: For 4K UHD video, typical bitrates range from 15-50 Mbps for H.264/AVC and 10-30 Mbps for H.265/HEVC.

Q2: Does this include audio in the calculation?
A: No, this calculates only the video component. For complete file size, you need to add audio size (audio bitrate × duration / 8).

Q3: How does compression affect file size?
A: More efficient codecs (like H.265/HEVC) can deliver similar quality at lower bitrates, resulting in smaller files compared to H.264/AVC.

Q4: What about variable bitrate (VBR)?
A: This calculator assumes constant bitrate (CBR). For VBR, use an average bitrate for estimation.

Q5: How can I find my video's bitrate?
A: Use media information tools like MediaInfo or check properties in video editing software.