To do this, you can use the eq filter to adjust the brightness. Here's a command-line example:

    ffmpeg -r 24 -pattern_type glob -i 'input_files_*.jpg' -vf "eq=brightness=0.1:saturation=1" -c:v libx264 -pix_fmt yuv420p -crf 23 output.mp4

Replace input_files_*.jpg with the appropriate pattern for your image files. This command assumes that your images are in the JPEG format. Change the file extension to match the image format you're using.
spam fails_task lang_mismatch pii not_appropriate hate_speech sexual_content quality toxicity humor helpfulness creativity violence