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About Video Bitrate Calculator
The Video Bitrate & Bandwidth Calculator computes target video bitrates (kbps / Mbps) to meet exact file size limits (e.g. 25MB Discord limit, 8MB email limit, or custom GB DVD targets) based on video duration and audio bitrate allocation.
How to Use Video Bitrate Calculator
Step 1
Enter video duration (minutes and seconds).
Step 2
Choose a target file size limit (or enter custom MB/GB).
Step 3
Select audio bitrate (128 kbps standard, 192 kbps music, 320 kbps high).
Step 4
Copy the calculated video bitrate and ready-to-use FFmpeg CLI command.
Practical Use Cases for Video Bitrate Calculator
Fitting Video Clips Under 25MB (Discord) & 8MB Email Attachment Limits
Calculate the exact maximum H.264 video bitrate needed to encode a 2-minute video clip so the final file stays strictly under 24.9 MB.
Planning Video Storage & Bandwidth Costs for Streaming Platforms
Calculate bandwidth consumption and data transfer costs for hosting 1080p and 4K video streams across AWS CloudFront or Cloudflare Stream.
Input & Output Examples
Fitting a 3-Minute Video into a 25MB Discord Limit
Duration: `3 min 00 sec (180s)`, Target File Size: `24.5 MB`, Audio Bitrate: `128 kbps`
Target Video Bitrate: `963 kbps` (Total Combined: `1091 kbps`) | FFmpeg flag: `-b:v 963k`
Key Features & Performance
- ✓Target Presets: Discord (25MB), Discord Nitro (500MB), Email Attachment (8MB/20MB), CD (700MB), DVD-5 (4.7GB), Blu-ray (25GB).
- ✓Formula: $\text{Video Bitrate} = (\text{Target Size (bits)} / \text{Duration (s)}) - \text{Audio Bitrate}$.
- ✓Generates copy-paste FFmpeg CLI command with calculated bitrate flags.
- ✓100% Client-Side memory execution.
- ✓1-Click Copy FFmpeg command.
Key Terminology & Definitions
Bitrate (kbps / Mbps)
The amount of digital data processed or transmitted per second of video playback ($1\text{ Byte} = 8\text{ bits}$).
Two-Pass Encoding (2-Pass VBR)
An encoding strategy that analyzes video complexity on pass 1 and allocates bit budgets on pass 2 to hit exact target file sizes without quality spikes.