If you cannot find a trusted download link, generating a precise 1GB MP4 is trivial using FFmpeg. This method is 100% safe and customizable.
Command (Windows/Mac/Linux):
ffmpeg -f lavfi -i testsrc=duration=600:size=1920x1080:rate=30 \
-f lavfi -i sine=frequency=1000:duration=600:sample_rate=48000 \
-c:v libx264 -b:v 13.5M -c:a aac -b:a 128k \
-movflags +faststart output_1gb.mp4
Explanation: This creates a 10-minute test pattern video. At 13.5 Mbps video + 128k audio, the file will be approximately 1,000 MB. Adjust duration or -b:v to hit exactly 1GB. download sample mp4 video files for testing 1gb top
Write the sample MP4 to an NVMe SSD, then to an HDD, then to a USB 2.0 stick. Measure write speed with dd or pv. The 1GB size is perfect for bypassing system cache but not wasting hours on a 10GB transfer.
Use FFmpeg to produce MP4s of a specific filesize by calculating target bitrate: If you cannot find a trusted download link,
ffmpeg -i input.mp4 -c:v libx264 -b:v 1500k -c:a aac -b:a 128k -preset medium output_1gb.mp4
The Internet Archive hosts hundreds of open-source films in MP4 format. Find a feature-length documentary or animation (e.g., Big Buck Bunny, Tears of Steel). The full 1080p version of Big Buck Bunny is roughly 800MB–1.2GB.
A 1GB MP4 file sits in a "sweet spot" for modern testing. It’s large enough to trigger timeouts, chunked upload errors, and rate limiting, but not so massive that it fills your test drive. Explanation: This creates a 10-minute test pattern video
Here is what a 1GB sample video helps you validate: