?playseek=${(b)yyyyMMddHHmmss}-${(e)yyyyMMddHHmmss}
#EXTM3U catchup="append" catchup-source="?playbackbegin=${(b)yyyyMMddHHmmss}&playbackend=${(e)yyyyMMddHHmmss}"
#EXTINF:-1 catchup="append" catchup-source="?playseek=${(b)yyyyMMddHHmmss}-${(e)yyyyMMddHHmmss}",CCTV1
http://hostname:port/xxx
#EXTINF:-1 catchup="default" catchup-source="http://hostname:port/xxx2?playseek=${(b)yyyyMMddHHmmss}-${(e)yyyyMMddHHmmss}",CCTV1
http://hostname:port/xxx
#EXTINF:-1 catchup="append" catchup-source="?playseek=${(b)yyyyMMddHHmmss:utc}-${(e)yyyyMMddHHmmss:utc}",CCTV1
http://hostname:port/xxx
#EXTINF:-1 catchup="append" catchup-source="?playseek={utc:YmdHMS}-{utcend:YmdHMS}",CCTV1
http://hostname:port/xxx