125 lines
3.9 KiB
Bash
Executable File
125 lines
3.9 KiB
Bash
Executable File
#!/usr/bin/env bash
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HLS_TIME=40
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M3U8_SIZE=3
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IPFS_GATEWAY="https://ipfs.io"
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# Load settings
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# Prepare Pi Camera
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sudo modprobe bcm2835-v4l2
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sudo v4l2-ctl --set-ctrl video_bitrate=100000
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function startFFmpeg() {
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while true; do
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mv ~/ffmpeg.log ~/ffmpeg.1
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echo 1 > ~/stream-reset
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# Stream Raspberry Pi Camera
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ffmpeg -f video4linux2 -input_format h264 -video_size 1280x720 -framerate 30 -i /dev/video0 -vcodec copy -hls_time "${HLS_TIME}" "${what}.m3u8" > ~/ffmpeg.log 2>&1
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# Stream FM Station from a SDR module (see contrib/pi-stream to install drivers)
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# Frequency ends in M IE 99.9M
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# rtl_fm -f 99.9M -M fm -s 170k -A std -l0 -E deemp -r 44.1k | ffmpeg -r 15 -loop 1 -i ../audio.jpg -f s16le -ac 1 -i pipe:0 -c:v libx264 -tune stillimage -preset ultrafast -hls_time "${HLS_TIME}" "${what}.m3u8" > ~/ffmpeg 2>&1
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sleep 0.5
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done
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}
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# Create directory for HLS content
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currentpath="$HOME/live"
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sudo umount "${currentpath}"
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rm -rf "${currentpath}"
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mkdir "${currentpath}"
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sudo mount -t tmpfs tmpfs "${currentpath}"
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# shellcheck disable=SC2164
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cd "${currentpath}"
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what="$(date +%Y%m%d%H%M)-LIVE"
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# Start ffmpeg in background
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startFFmpeg &
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while true; do
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#TODO# Fix this one
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# shellcheck disable=SC2086,SC2012
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nextfile=$(ls -tr ${what}*.ts 2>/dev/null | head -n 1)
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if [ -n "${nextfile}" ]; then
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# Check if the next file on the list is still being written to by ffmpeg
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if lsof "${nextfile}" | grep -1 ffmpeg; then
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# Wait for file to finish writing
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# If not finished in 45 seconds something is wrong, timeout
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inotifywait -e close_write "${nextfile}" -t ${HLS_TIME}
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fi
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# Grab the timecode from the m3u8 file so we can add it to the log
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timecode=$(grep -B1 "${nextfile}" "${what}.m3u8" | head -n1 | awk -F : '{print $2}' | tr -d ,)
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attempts=5
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until [[ "${timecode}" || ${attempts} -eq 0 ]]; do
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# Wait and retry
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sleep 0.5
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timecode=$(grep -B1 "${nextfile}" "${what}.m3u8" | head -n1 | awk -F : '{print $2}' | tr -d ,)
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attempts=$((attempts-1))
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done
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if ! [[ "${timecode}" ]]; then
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# Set approximate timecode
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timecode="${HLS_TIME}.000000"
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fi
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reset_stream=$(cat ~/stream-reset)
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reset_stream_marker=''
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if [[ ${reset_stream} -eq '1' ]]; then
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reset_stream_marker=" #EXT-X-DISCONTINUITY"
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fi
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echo 0 > ~/stream-reset
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# Current UTC date for the log
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time=$(date "+%F-%H-%M-%S")
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# Add ts file to IPFS
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ret=$(ipfs add --pin=false "${nextfile}" 2>/dev/null > ~/tmp.txt; echo $?)
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attempts=5
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until [[ ${ret} -eq 0 || ${attempts} -eq 0 ]]; do
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# Wait and retry
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sleep 0.5
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ret=$(ipfs add --pin=false "${nextfile}" 2>/dev/null > ~/tmp.txt; echo $?)
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attempts=$((attempts-1))
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done
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if [[ ${ret} -eq 0 ]]; then
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# Update the log with the future name (hash already there)
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echo "$(cat ~/tmp.txt) ${time}.ts ${timecode}${reset_stream_marker}" >> ~/process-stream.log
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# Remove nextfile and tmp.txt
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rm -f "${nextfile}" ~/tmp.txt
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# Write the m3u8 file with the new IPFS hashes from the log
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totalLines="$(wc -l ~/process-stream.log | awk '{print $1}')"
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sequence=0
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if ((totalLines>M3U8_SIZE)); then
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sequence=$((totalLines-M3U8_SIZE))
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fi
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{
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echo "#EXTM3U"
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echo "#EXT-X-VERSION:3"
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echo "#EXT-X-TARGETDURATION:${HLS_TIME}"
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echo "#EXT-X-MEDIA-SEQUENCE:${sequence}"
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} > current.m3u8
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tail -n ${M3U8_SIZE} ~/process-stream.log | awk '{print $6"#EXTINF:"$5",\n'${IPFS_GATEWAY}'/ipfs/"$2}' | sed 's/#EXT-X-DISCONTINUITY#/#EXT-X-DISCONTINUITY\n#/g' >> current.m3u8
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# Add m3u8 file to IPFS and IPNS publish
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m3u8hash=$(ipfs add current.m3u8 | awk '{print $2}')
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ipfs name publish --timeout=5s "${m3u8hash}" &
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# Copy files to web server
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cp current.m3u8 /var/www/html/live.m3u8
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cp ~/process-stream.log /var/www/html/live.log
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fi
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else
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sleep 5
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fi
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done
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