1920x1080:
ffmpeg.exe -r <framerate> -i "c:\tmp\jpg_folder\frame_%04d.jpg" -ac 2 -strict experimental -s hd1080 -vcodec libx264 -preset slow -profile:v baseline -level 31 -refs 1 -maxrate 10M -bufsize 10M -vb 8M -threads 0 -g 4 -r <framerate> "c:\tmp\mp4_folder\h264_clip.mp4" -y