Why is the Batch script I created to convert MP4 files to GIF files with FFmpeg not working?

Question

This is what I have so far. It runs, but throws an error.

I have come up with the following below.

for %%a in ("*.mp4") do ffmpeg -i "%%a" -t 3 -vf "fps=10, scale=320, flags=lanczos, split[s0][s1];[s0]palettegen[p];[s1][p]paletteuse" -loop 0 copy "__newfiles\%%~na.gif"

Answer 1

Unable to find a suitable output format for 'copy'

Remove copy. That's not an actual option. ffmpeg is assuming you want the output to be named copy, but it doesn't know what container format (GIF, MP4, AVI, MKV, MOV, etc) copy is supposed to be.

Invalid size '320'

Change scale=320 to scale=320:-1. You need to provide both width and height. The -1 means to automatically choose the correct height. See the scale filter documentation.

No such filter: 'flags'

flags is not a standalone filter. It is an option for the scale filter. Change scale=320:-1, flags=lanczos to scale=320:-1:flags=lanczos. See the scale filter documentation.

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Fixed command

for %%a in ("*.mp4") do ffmpeg -i "%%a" -t 3 -vf "fps=10, scale=320:-1:flags=lanczos, split[s0][s1];[s0]palettegen[p];[s1][p]paletteuse" -loop 0 "__newfiles\%%~na.gif"