Metrics

Metrics is an optional log of how hard the computer worked while you recorded. Nothing is drawn on the video. After you stop, NitroWarp can chart the log. The same file opens in Excel.

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Log metrics while recording is off until you check it. A long recording then also writes a small .metrics.csv beside the video, about one line each second. Leave it off when you do not need the chart.

Opening the Metrics page does not load the last log by itself. The chart stays empty until one of these happens:

• You click Last recording.
• You click Open CSV and pick a file.
• You stop a recording while the Metrics page is already open.

What the lines mean

Turn lines off until the one you care about is easy to see. One line is given the full height of the chart, so the peaks are easier to read.

• CPU is NitroWarp's own share of the processor.
• System is how busy the whole computer was.
• RAM is the memory NitroWarp was using, in megabytes.
• Disk is how fast the video file grew that second, in megabytes per second.
• Unique fps is how many new pictures the screen actually produced.
• Encode fps is how many frames were written into the file, including repeated frames that keep the timing steady. If unique fps stays far below the frame rate you asked for, the desktop is not presenting pictures that fast.
• GPU encode is the busiest video-encode engine Windows reports, as a percent. It appears when that counter exists.
• GPU 3D is the busiest 3D or copy engine, as a percent. A high number during a game recording is the game drawing, not a sign that the file is corrupt.
• GPU memory is how much of the graphics card's own memory was in use. The top of that chart is the whole card, so a line at the top means the card is full. This is separate from RAM, which is only NitroWarp. A full card can stutter even when the percent lines are not at 100.

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Read the GPU lines with the frame rate. GPU 3D near the top and unique fps below the rate you asked for means the card is spending itself on the game. GPU encode near the top, with encoded fps behind unique fps and the dropped count rising, means the encoder fell behind. High percents with the frame rate holding and dropped staying flat means the card is busy and still keeping up.

The gpu column in the CSV is a flag for the encode path: 1 means a graphics card encoded, -1 means the CPU did it, and 0 means it was not known. gpu_enc and gpu_3d are the percents. gpu_mb is dedicated memory in use and gpu_total_mb is that card's total, both in megabytes. An older log without the newer columns still opens.

Large view

Large view opens a separate 16:9 window so the peaks are easier to see. Its checkboxes start from the main page, then stay independent. Closing that window does not quit NitroWarp.

Save PNG 1080p writes a 1920 by 1080 picture of the lines currently shown. Save PNG 4K writes 3840 by 2160. Close hides the large view.

You can also send someone the .metrics.csv. In Excel, use Data, From Text/CSV.

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