Experiment

1080p vs 720p at the Same File Size: A Video Compression Test

At one target size, 1080, 720 and 480 can preserve different detail. Compare ripples and foliage in a landscape clip.

A higher resolution describes the frame with more pixels, but a fixed byte budget can leave less data for that detail. Compare the same interval at a shared display size, looking at ripple edges and foliage texture.

The same landscape clip compressed toward 1MiB

The six-second 1080×1920 landscape clip was encoded at maximum heights 1080, 720 and 480 with a 1MiB (1,048,576-byte) target. These frames show the same three-second position. Black bands are part of the source and remain unchanged.

Frames share a display size, including enlarged lower-resolution outputs. Check ripples and foliage at the intended viewing size, and use exact saved bytes to assess an upload cap.

608×1080 · 976,086 B
Video details608×1080 · 976,086 B
406×720 · 988,643 B
Video details406×720 · 988,643 B
270×480 · 992,527 B
Video details270×480 · 992,527 B

Compare the same ripples and foliage

The same region has a shared display size; lower-resolution outputs are enlarged. Judge the scene and bitrate together, not resolution alone.

1080
1080
720
720
480
480

More pixels do not add bitrate

At one duration and byte budget, each second has limited data. Higher resolution spreads it across more pixels and is not always clearer.

Which scenes to inspect first

Check small text, rapid motion and important detail such as faces or foliage. Pick a compliant output that remains readable at its intended size.

A longer video needs a different judgment

The same 1MiB spread over a long meeting provides far fewer bits per second than this six-second sample. Length and scene complexity matter; verify saved bytes.

Test conditions and reproduction

A six-second landscape clip at one 1MiB target

  1. 1

    The same interval of a six-second 1080×1920 landscape clip was used.

  2. 2

    The shipped FFmpeg WASM and production command builders ran locally.

Raw reproducibility records (JSON)

The main results are explained above. These raw records contain processing conditions and file hashes. Opening a link displays JSON text, not an illustrated article.

Official documentation used for this analysis

Choose the needed detail, not the highest number

All three outputs approached the 1MiB target with different pixel counts. A small-screen copy and material requiring zoomable text need different decisions. Test the most demanding passage in your own video to choose sufficient resolution.