Adding SMPTE timecode to video recorded on Pixel 3

smpte.sh

ffmpeg \
  -i INPUT_FILE.mp4 \
  -vf drawtext="fontfile=/usr/share/fonts/truetype/dejavu/DejaVuSans.ttf: fontsize=96: box=1: boxcolor=black@0.75: boxborderw=5: fontcolor=white: x=(w-text_w)/2: y=((h-text_h)/2)-(3*((h-text_h)/8)):timecode='00\:00\:00\:00':rate=28.09" \
  OUTPUT_FILE.mp4

smpte_fast.sh

ffmpeg \
  -i INPUT_FILE.mp4 \
  -preset ultrafast -f mp4 \
  -vf drawtext="fontfile=/usr/share/fonts/truetype/dejavu/DejaVuSans.ttf: fontsize=96: box=1: boxcolor=black@0.75: boxborderw=5: fontcolor=white: x=(w-text_w)/2: y=((h-text_h)/2)-(3*((h-text_h)/8)):timecode='00\:00\:00\:00':rate=30" \
  OUTPUT_FILE.mp4