Note in below example commands, the 10367 is the index number of the first image which is used in feeding the pattern G%07d.JPG.

simple AVI

ffmpeg -f image2 -framerate 30 -start_number 10367 -i G%07d.JPG foo.avi

x264

ffmpeg -r 30 -start_number 10367 -i G%07d.JPG -vcodec libx264 -preset veryslow -crf 15 -pix_fmt yuv420p foo2.mp4

with GPU acceleration

ffmpeg -f image2 -framerate 15 -start_number 10367 -i G%07d.JPG -frames:v 500 -vcodec h264_nvenc -pix_fmt yuv420p foo3.mp4

However, the video quality from CUDA x264 encoder is much worse than the libx264, I ended up using the libx64 :( My final configuration:

ffmpeg -f image2 -framerate 15 -start_number 10367 -i G%07d.JPG -vf scale=1920:-1 -vcodec libx264 -preset veryslow -crf 25 -pix_fmt yuv420p foo.mp4