Trying to extract 1 image from multiple videos with FFMPEG

[mordor]

Im on windows 7. I have multiple videos in a folder and need to extract 1 image from the exact same frame of each of those videos (that is 20 seconds into each video), i know the command below extract the image from a single video:

ffmpeg -ss 20 -i video.mp4 -t 1 -s 590x340 -f image2 imagefile.jpg

and even tho it throws me this error:

Could not get frame filename number 2 from pattern '
imagefile.jpg' (either set updatefirst or use a pattern like %03d within the filen
ame pattern)

the image is extracted just fine.

Any bash script that could automate this process for every video on this folder in one go? The videos names are not in a sequence, totally different from each other.

Also the extracted image files would need to have different names so they dont replace each other when extracting. Would be good the images had the same filenames of the input videos.

Please let me know, thank you!

[fvisagie]

This is for Windows but you can apply exactly the same principles for any operating system. 'rem' is the Windows comment identifier - nothing on that line is executed.

rem Processes all videos, one at a time
rem Bases the output filename on the input filename to ensure uniqueness
rem %%i is replaced with the names of the files, one at a time. Substitute *.mp4 as needed.

for %%i in (*.mp4) do ffmpeg -ss 20 -i %%i -t 1 -s 590x340 -f image2 %%i.jpg

Cheers,
Francois

[mordor]

That did it, thank you!