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cc-stuff/convert-video.sh

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#!/usr/bin/bash
set -e
export TMP_DIR="$(mktemp -d)";
cleanup() {
rm -fr "${TMP_DIR}";
}
trap cleanup EXIT
export URL="$1";
export NAME="$2";
export BASE_URL="$3"
if [ -z "${BASE_URL}" ]; then
export BASE_URL="CHANGEME";
fi
mkdir -p "${NAME}"
export ORIG="$(pwd)";
cd "${TMP_DIR}"
yt-dlp "${URL}" -o "${NAME}"
ffmpeg -i $2.* -filter_complex "[0:a]channelsplit=channel_layout=stereo[left][right]" -map '[left]' -f s8 -ac 1 -ar 48k "${ORIG}/${NAME}/left.s8" -map '[right]' -f s8 -ac 1 -ar 48k "${ORIG}/${NAME}/right.s8"
ffmpeg -i $2.* -vf fps=20 frame%04d.png
rm $2.*
ls frame*.png | parallel 'echo {}; python3 ${ORIG}/cc-pic.py -W 164 -H 81 -p cover {} ${ORIG}/${NAME}/{.}.cpi'
rm frame*.png
cd "${ORIG}"
export FRAME_COUNT="$(ls ${NAME}/*.cpi | wc -l)";
#'{"frame_time": 0.05,"frame_count": ${FRAME_COUNT},"video": "${BASE_URL}/${NAME}/frame%04d.cpi","audio": {"l": "${BASE_URL}/${NAME}/left.s8", "r": "${BASE_URL}/${NAME}/right.s8"}}' > "${NAME}/${NAME}.json"
printf '{"frame_time": 0.05, "frame_count": %d, "video": "%s", "audio": {"l": "%s", "r": "%s"}}\n' "${FRAME_COUNT}" "${BASE_URL}/${NAME}/frame%04d.cpi" "${BASE_URL}/${NAME}/left.s8" "${BASE_URL}/${NAME}/right.s8" > "${NAME}/${NAME}.json"