Merge all tesla sentry videos with timestamp overlay

merge_tesla_sentry_videos.sh

#!/bin/bash
# Copyright 2024 Marc-Antoine Ruel
# Original at https://gist.github.com/maruel/ffbcd83f204561346bbe3cc51682e7af
#
# Merges mp4 from Tesla Sentry into 4 videos files: front.mp4, back.mp4,
# left_repeater.mp4, right_repeater.mp4. Overlay the timestamp on the video.
#
# Usage:
# - Install ffmpeg.
# - Copy all the files from your Tesla Sentry USB key in a directory.
# - Run this script from this directory.
set -eu

# Get the first file name to determine the start time.
EPOCH="$(python3 -c "import datetime,glob;d=datetime.datetime;print(round((d.strptime(sorted(glob.glob('*-front.mp4'))[0][:19],'%Y-%m-%d_%H-%M-%S')-d(1970,1,1)).total_seconds()))")"

FONTFILE="/usr/share/fonts/truetype/noto/NotoSansMono-Regular.ttf"
CONTENT="text='%{pts\:gmtime\:$EPOCH\:%Y-%m-%d %T}': "
ASPECT="fontsize=48: fontcolor=white: box=1: [email protected]:"
LOCATION="x=(w-text_w-10): y=(h-text_h-10):"
SETTINGS="drawtext=fontfile=$FONTFILE: $CONTENT $LOCATION $ASPECT"

for side in front back left_repeater right_repeater; do
  NAME="${side}.mp4"
  echo "- Generating $NAME"
  rm -f inputs.txt
  for i in $(ls *-${side}.mp4); do echo "file '$i'" >> inputs.txt; done
  # Options to make it smaller:
  # -r 1
  # -crf 37
  ffmpeg -hide_banner -loglevel error -f concat -safe 0 -i inputs.txt -r 10 \
    -vf "$SETTINGS" -movflags +faststart -preset veryslow $NAME
  rm inputs.txt
done

video_to_film_strip.sh

#!/bin/bash
# Copyright 2024 Marc-Antoine Ruel
# Original at https://gist.github.com/maruel/ffbcd83f204561346bbe3cc51682e7af
#
# Generates a film strip from each videos.
#
# Assumes merge_tesla_sentry_videos.sh was run before.
#
# Adapt this code to your specific needs.

set -eu

function gen_strip {
  side=$1
  offset=$2
  fps=$3
  duration=$4
  tile=$5
  out=$6
  rm -f frame_*.png
  echo "Doing $out"
  ffmpeg -y -hide_banner -loglevel error -i ${side}.mp4 \
    -ss $offset -vf "fps=$fps" -t $duration frame_%03d.png
  ffmpeg -y -hide_banner -loglevel error -i frame_%03d.png \
    -filter_complex "tile=$tile" $out
  rm frame_*.png
}


#for side in front back left_repeater right_repeater; do
#  gen_strip $side 00:00:00 1/5 50 2x5 ${side}.jpg
#done

# Adapt to your needs:
gen_strip front 00:00:00 1/2 20 2x5 front1.jpg
gen_strip front 00:09:00 1/2 80 5x8 front2.jpg