tcpで生TSをもらってVLCでトランスコード結果をHTTPストリーミング

do_vlc_live.sh

#!/bin/sh

if [ "x$1" = "x" -o "x$2" = "x" ]; then
  echo "Usage: $0 inport outport"
  exit 1
fi

if [ "x$3" = "x" ]; then
  BITRATE=128
else
  BITRATE=$3
fi

if [ "x$VLC" = "x" ]; then
  VLC=cvlc-git
fi

INPORT=$1
OUTPORT=$2
FPS=15
KEYINT=$(expr $FPS \* 2)

WIDTH=480
HEIGHT=$(expr $WIDTH \* 9 / 16)

PHYS_DIR=/var/www/example.jp/ts/$INPORT
URL_DIR=http://example.jp/ts/$INPORT
FILE_MASK=stream-########.ts
FILE_WILDCARD=$(echo $FILE_MASK | tr -s \# \*)
PLAYLIST=stream.m3u8

HTTP_OUT=127.0.0.1:$OUTPORT/ts

mkdir -p $PHYS_DIR
rm -f $PHYS_DIR/{$FILE_WILDCARD,$PLAYLIST}

XCODE_OPTS=transcode{venc=x264{profile=baseline,keyint=$KEYINT,fps=$FPS,bitrate=$BITRATE},vcodec=h264,vb=$BITRATE,acodec=mp4a,ab=96,fps=$FPS,deinterlace,threads=4,vfilter=canvas{width=$WIDTH,height=$HEIGHT,aspect=16:9}}

LIVE_OPTS=std{access=livehttp{numsegs=10,index=$PHYS_DIR/$PLAYLIST,index-url=$URL_DIR/$FILE_MASK},mux=ts{use-key-frames},dst=$PHYS_DIR/$FILE_MASK}

HTTP_OPTS=std{access=http,mux=ts{use-key-frames},dst=$HTTP_OUT}

exec $VLC -q -d tcp://127.0.0.1:$INPORT \
	--sout "#$XCODE_OPTS:duplicate{dst=$LIVE_OPTS,dst=$HTTP_OPTS}"

HTTP Live Download サポートのために、VLC は git HEAD が必要。