add script to stream a v4l2 device

stream_v4l_device.sh

@@ -0,0 +1,96 @@
+#!/bin/bash
+
+DURATION=300
+RESOLUTION=1280x720
+VBITRATE=2048
+ABITRATE=128
+V4LDEVICE=/dev/video0
+
+if [[ $# -lt 3 ]] ; then
+  echo "Not enough arguments supplied" >&2
+  echo "You need to pass at least the PeerTube server name as the " >&2
+  echo "first parameter the rtmp port as the second and the streaming key as the third" >&2
+  echo " " >&2
+  echo "syntax: " >&2
+  echo "  $(basename $0) <peertube-server> <rtmp port> <streaming-key> <duration-in-sec> <resolution> <video-bitrate-kbps> <audio-bitrate-kbps> <v4ldevice>" >&2
+  echo " " >&2
+  echo "other parameters are optional and will default to the " >&2
+  echo "values in the following example :" >&2
+  echo "  `basename $0` tube.example.com 1935 69ac2d29-eba4-4d5f-a3a6-6047e6768ffb $DURATION $RESOLUTION $VBITRATE $ABITRATE $V4LDEVICE" >&2
+  exit 1
+fi
+
+URL=rtmp://$1:$2/live/$3
+
+if [[ ! -z "$4" ]]
+then
+  DURATION="$4"
+fi
+
+if [[ ! -z "$5" ]]
+then
+  RESOLUTION="$5"
+fi
+
+if [[ ! -z "$6" ]]
+then
+  VBITRATE="$6"
+fi
+
+BUFFERSIZE=$(echo "2*${VBITRATE}" | bc)
+
+if [[ ! -z "$7" ]]
+then
+  ABITRATE="$7"
+fi
+
+if [[ ! -z "$8" ]]
+then
+  V4LDEVICE="$8"
+fi
+
+
+FILENAME=live-v4l-${1}-${V4LDEVICE}-${RESOLUTION}p-${DURATION}s-${VBITRATE}kbps-${ABITRATE}kbps-${2}.mkv
+echo " "
+echo Will stream to $URL for $DURATION seconds
+echo and save a copy of the data sent to the peertube server to file :
+echo $FILENAME
+echo with :
+echo "- $RESOLUTION resolution, "
+echo "- $VBITRATE kbit/s constant video bitrate, "
+echo "- $BUFFERSIZE kbit video buffer and "
+echo "- $ABITRATE kbit/s audio bitrate"
+echo " "
+$
+
+#-x264opts nal-hrd=cbr:force-cfr=1:vbv-bufsize=${BUFFERSIZE}:bitrate=${VBITRATE}:vbv-maxrate=${VBITRATE} \
+#-shortest \
+
+ffmpeg \
+-loglevel level \
+#-s ${RESOLUTION} \
+#-loop 1 \
+#-r 25 \
+-y \
+
+#-ac 2 \
+
+-f v4l2 -framerate 25 -video_size ${RESOLUTION} -i ${V4LDEVICE}
+
+#-re \
+#-f lavfi \
+#-i aevalsrc="(1-min(1\,mod(floor(5*t)\,50)))*0.1*sin(8*PI*(360-2.5/2)*t)+0.1*sin(2*PI*(360-2.5/2)*t)|(1-min(1\,mod(floor(5*t)\,50)))*0.1*sin(8*PI*(360+2.5/2)*t)+0.1*sin(2*PI*(360+2.5/2)*t):sample_rate=48000" \
+
+-f alsa -ac 2 -i hw:CARD=CAMERA,DEV=0
+
+-channel_layout stereo \
+-ar 48000 \
+-pixel_format yuv420p \
+-filter_complex "[1:a]volume=-10dB;[0:v]scale='size=${RESOLUTION}',drawtext='font=DejaVuSansMono:text=%{pts}: fontcolor=white: fontsize=h/7: box=1: boxcolor=black@0.73: boxborderw=5: x=mod(floor(t/10+1)\,2)*mod(t*(w-text_w)/10\,w-text_w)+mod(floor(t/10)\,2)*(w-text_w-mod(t*(w-text_w)/10\,w-text_w)): y=h/2-3*text_h/2', drawtext='font=DejaVuSansMono:text=%{localtime}: fontcolor=white: fontsize=h/7: box=1: boxcolor=black@0.73: boxborderw=5: x=(w-text_w)/2: y=h/2+3*text_h/2'" \
+-codec:v libx264 \
+-preset superfast \
+-x264opts nal-hrd=cbr:force-cfr=1:vbv-bufsize=${BUFFERSIZE}:bitrate=${VBITRATE}:vbv-maxrate=${VBITRATE} \
+-c:a aac -b:a ${ABITRATE}k \
+-t ${DURATION} \
+-flags +global_header \
+-f tee -map 0:v -map 1:a "[f=matroska]${FILENAME}|[f=flv]${URL}"