record_openrec.sh

#!/bin/bash
# OPENREC.tv Live Stream Recorder

if [[ ! -n "$1" ]]; then
  echo "usage: $0 openrec_id [format] [loop|once] [interval]"
  exit 1
fi

# Record the highest quality available by default
FORMAT="${2:-best}"
INTERVAL="${4:-10}"

while true; do
  # Monitor live streams of specific channel
  while true; do
    LOG_PREFIX=$(date +"[%Y-%m-%d %H:%M:%S]")
    echo "$LOG_PREFIX Try to get current live stream of openrec.tv/user/$1"

    # Extract current live stream from channel page
    LIVE_URL=$(curl -s "https://www.openrec.tv/user/$1" |\
      grep -Eoi "href=\"https://www.openrec.tv/live/(.+)\" class" |\
      head -n 1 | cut -d '"' -f 2)
    [[ -n "$LIVE_URL" ]] && break

    echo "$LOG_PREFIX The stream is not available now."
    echo "$LOG_PREFIX Retry after $INTERVAL seconds..."
    sleep $INTERVAL
  done

  # Get the m3u8 address with streamlink
  M3U8_URL=$(streamlink --stream-url "$LIVE_URL" "$FORMAT")

  # Record using MPEG-2 TS format to avoid broken file caused by interruption
  FNAME="openrec_${1}_$(date +"%Y%m%d_%H%M%S").ts"
  echo "$LOG_PREFIX Start recording, stream saved to \"$FNAME\"."
  echo "$LOG_PREFIX Use command \"tail -f $FNAME.log\" to track recording progress."

  # Start recording
  ffmpeg -i "$M3U8_URL" -codec copy -f mpegts "$FNAME" > "$FNAME.log" 2>&1

  # Exit if we just need to record current stream
  LOG_PREFIX=$(date +"[%Y-%m-%d %H:%M:%S]")
  echo "$LOG_PREFIX Live stream recording stopped."
  [[ "$3" == "once" ]] && break
done