360mp4: Blender, Camera/Panoramic/Equirectangular, Stereoscopy/Multi-View. Views Format/Indivisual

a.sh

#! /bin/sh -x
DIR=`pwd`
FPS=24
S_NUMBER=83
LOOP=10
STEREO="left-right" #"top-bottom"
DIST_PREFIX="dist"
SRC_DIR="360"
DIST_DIR=${DIR}

TMPFILE=$(mktemp)
function rm_tmpfile {
  rm -f "$TMPFILE" #amust be absolute
}
trap rm_tmpfile EXIT
L_FILE=${DIST_DIR}/${DIST_PREFIX}_L.mp4 
R_FILE=${DIST_DIR}/${DIST_PREFIX}_R.mp4 
LR_FILE=${DIST_DIR}/${DIST_PREFIX}_LR.mp4 
LOOPED_FILE=${DIST_DIR}/${DIST_PREFIX}_LR_looped.mp4 
INJECTED_FILE=${DIST_DIR}/${DIST_PREFIX}_LR_looped_injected.mp4 
rm ${L_FILE} ${R_FILE} ${LR_FILE} ${LOOPED_FILE} ${INJECTED_FILE}

yes "file '${LR_FILE}'" | head -${LOOP} > ${TMPFILE}

ffmpeg -an -r ${FPS} -start_number ${S_NUMBER} -i ${SRC_DIR}/%04d_L.png  -vcodec libx264 -pix_fmt yuv420p ${L_FILE}
ffmpeg -an -r ${FPS} -start_number ${S_NUMBER} -i ${SRC_DIR}/%04d_R.png  -vcodec libx264 -pix_fmt yuv420p ${R_FILE}
ffmpeg -i ${L_FILE} -i ${R_FILE} -filter_complex hstack=inputs=2 ${LR_FILE}
ffmpeg -safe 0 -f concat -i ${TMPFILE} -c copy ${LOOPED_FILE}

spatial_media_DIR="/Users/Work/Documents/github/spatial-media" #https://github.com/google/spatial-media
cd ${spatial_media_DIR}; python spatialmedia -i -s ${STEREO} ${LOOPED_FILE} ${INJECTED_FILE}

ffprobe -show_data -hide_banner ${INJECTED_FILE}