Question: ```
ffmpeg -ss 4.5 -t 3.9 -i input.mp4 -vf "fps=18,scale=360:-2:flags=lanczos,palettegen" palette.png

ffmpeg -ss 4.5 -t 3.9 -i input.mp4 -i palette.png -filter_complex "fps=18,scale=360:-2:flags=lanczos[x];[x][1:v]palett‎euse" output.gif

```

I used this command to make a gif, but I don't know what `[x];[x][1:v]` means.

What is this all about?

Answer: 
If you want to use the `countif`.

Add a new column with this formula:

`=COUNTIF($E$2:$E$40000, E2)`. After the formula show the result, triple click the bottom right corner of the cell to down copy the formula for the 40 000 cells. The value contain in this cell going to be the total count of the value in column `E` for all the column.

Hope this help

Source:
<https://www.extendoffice.com/documents/excel/2414-excel-count-cells-with-specific-text.html>
Use the search in Excel. Shortcut `CTRL + F` and `Find All` will count it for you.