Each of the following commands generates a .mjpeg file — a Motion JPEG video format — from an input .mp4 or .mov video, optimized for use in frame-by-frame playback with an SD card reader.

Make sure you have FFmpeg installed and accessible from your terminal or command prompt.

ffmpeg -y -i input.mp4 -pix_fmt yuvj420p -q:v 7 -vf "transpose=1,fps=24,scale=-1:320:flags=lanczos" output.mjpeg

ffmpeg -y -i input.mp4 -pix_fmt yuvj420p -q:v 7 -vf "fps=24,scale=-1:320:flags=lanczos" output.mjpeg

ffmpeg -y -i cropped_4x3.mp4 -pix_fmt yuvj420p -q:v 7 -vf "transpose=1,fps=24,scale=240:320:flags=lanczos" final_240x320.mjpeg

ffmpeg -y -i cropped.mp4 -pix_fmt yuvj420p -q:v 7 -vf "fps=24,scale=240:320:flags=lanczos" scaled.mjpeg

• -pix_fmt yuvj420p: Ensures JPEG-compatible pixel format
• -q:v 7: Controls image quality (lower is better; 1 = best, 31 = worst)
• -vf: Specifies the video filters:
• fps=24: Extracts 24 frames per second
• scale: Resizes the video
• transpose=1: Rotates the video 90° clockwise
• .mjpeg: Output format used when streaming or storing a series of JPEG frames as a video