Video comparison wipe
Compare two versions of a shot side by side, with a wipe or a difference view. PNG comparisons also measure pixel differences.
Accepted files: .png,.mp4,.mov,.m4v,.webm,.mkv,image/png,video/mp4,video/quicktime,video/webm,video/x-matroska. Multiple files supported. Up to 20 MiB in total.
Two PNG images of the same size up to 1920 x 1080 pixels, or two videos up to 2 minutes, 1080p and 20 MiB each. Frame grabs are compared on your device without the video engine; videos use the bundled browser video engine. Nothing is uploaded. PNG inputs: comparison PNG, JSON report and pixel-metrics CSV. Video inputs: MP4 and JSON report. Select both files at once; the first is shown on the left or top. Up to 1,000,000 characters. Review the settings before running.
Your result
How to use Video comparison wipe
- Choose two PNG frame grabs of the same size, or two videos.
- Pick wipe, difference or side by side, and set the wipe position and direction.
- Run the comparison. For PNG inputs, read the pixel difference figures.
- Download the comparison PNG with its JSON report and metrics CSV, or the MP4 with its JSON report for video inputs.
Useful next steps
Views
Wipe shows the first version on the left (or top) of the divider and the second version on the other side. Difference shows the absolute difference of each red, green and blue value, so identical areas are black. Side by side places the two versions next to each other.
Difference figures
For frame grabs the tool reports the mean and largest absolute difference of red, green and blue values (0 to 255), the PSNR in decibels (blank when the frames are identical), and how many pixels differ by more than 8 in any channel. These figures compare decoded pixels exactly; they do not judge perceived quality.
Synchronized preview and video export
The preview keeps both videos within their shared time range and pauses both when the shorter overlap ends. A positive offset starts the second video later on the first video’s timeline. Previous and next preview frame move by one period of the preview frame rate you choose; variable-frame-rate video may not land on an exact source frame. Previews are muted. For exact frame-grab pixel checks, compare PNG images. Video export uses the frame rate and size of the first video, rounds the offset to whole frames, and covers only their overlap. The exported frame count and size are checked before download.