[SOLVED] unexpected token

aantoonio · 02-27-2024, 07:00 AM

Code:

$ for %%a in (A B C D E) do Echo %%a
bash: syntax error near unexpected token `('

Why do I get this error?

ntubski · 02-27-2024, 07:22 AM

You are trying to use DOS/Windows .bat file commands in bash, which has a completely different syntax. Try

Code:

for a in A B C D E ; do echo "$a" ; done

aantoonio · 02-27-2024, 07:37 AM

That was super dumb of me. How I got there is trying to do

Quote:

for %%A IN (*.mp4) DO ffmpeg -i "%%A" -vf "select=gte(n\,300)" -vframes 1 "%%~nA.png"

Can you translate this to bash for me?
TIA

NevemTeve · 02-27-2024, 08:08 AM

Combine post#2 with this bit of information:

Code:

WinDos: %%~nA
bash:   ${A%.*}

So it would be something like this:

Code:

for A in *.mp4; do ffmpeg -i "$A" -vf "select=gte(n,300)" -vframes 1 "${A%.*}.png"; done

aantoonio · 02-27-2024, 08:22 AM

@Nevem Teve
I have no idea what that means.

aantoonio · 02-27-2024, 08:58 AM

I get

Quote:

[Parsed_select_0 @ 0x5592261c2940] [Eval @ 0x7ffdf3e75510] Missing ')' or too many args in 'gte(n'
[Parsed_select_0 @ 0x5592261c2940] Error while parsing expression 'gte(n'

even if I change 300 in to 3 is the same result

aantoonio · 02-27-2024, 09:14 AM

Don't bother even if I leave out that part I get other errors. This just too complicated for me.
Thanks for the response tho.

NevemTeve · 02-27-2024, 09:42 AM

Sorry, I left of the \backslash, so try this:

Code:

for A in *.mp4; do ffmpeg -i "$A" -vf 'select=gte(n\,300)' -vframes 1 "${A%.*}.png"; done

pan64 · 02-27-2024, 09:45 AM

try this (replace " with '):

Code:

for A in *.mp4; do ffmpeg -i "$A" -vf 'select=gte(n,300)' -vframes 1 "${A%.*}.png"; done
                                      ^                 ^

aantoonio · 02-27-2024, 10:05 AM

It was the \
I'm happy I came back. It works like charm.
Thank you.
Solved.