fifonik / FFMetrics

Visualizes Video Quality Metrics (PSNR, SSIM & VMAF) calculated by ffmpeg.exe
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[Question] What do the colors mean? #53

Closed fu-hsi closed 3 years ago

fu-hsi commented 3 years ago

Green, red and transparent when displaying statistics, VMAF for example?

fifonik commented 3 years ago

Green -- The best statistic of the metric within processed files Red -- The worst statistic of the metric within processed files

Mean, Mean (harm), Min, Max, Percentiles -- Higher is better StdDev (pop) -- Lower is better

Example: Here I calculated PSNR & SSIM for 3 files. When I hover mouse over PSNR value of the 1st file I see that all stats except StdDev are the best and the StdDev is the worst. image

When I hove mouse over PSNR value of the 2nd file I see that StdDev is the best: image

When I hove mouse over PSNR value of the 3rd file I see that all values except StdDev are the worst: image

I see a bug here as based my changelog only ticked files should be taken into consideration:

0.9.0b ... New: The Best/The Worst Min/Max/Avg/StdDevP metrics' values in Tooltip highlighted (only ticked files are taken into consideration)

fifonik commented 3 years ago

Should be fixed in 0.9.8

fu-hsi commented 3 years ago

So which file is better? For me (for a simple man :) first file with the highest PSNR value, or not? Can you consider change background item in list view for the best match to the original file? In this case, you wouldn't need to read the statistics. Maybe some sort by column will be good option too. Now we don't have sort possibility by the best and worst match.

fifonik commented 3 years ago

There is no just "better". Different people have different criteria. In most cases, it should be enough just to check the displayed value/graphs and not go to the stats. Higher PSNR/SSIM/VMAF value => "better". Not always, this is the reason why the program exists.

As for highlighting the best/the worst in the grid -- please create a new "issue" for the feature request.

fu-hsi commented 3 years ago

Graph is OK, but when i have 15 items it's hard to read graph when several files (lines) overlap. Sorting is a good option. Gratings.