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197 lines
6.1 KiB
197 lines
6.1 KiB
#!/usr/bin/env bash
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function show_usage()
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{
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echo
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echo "USAGE"
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echo "-----"
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echo
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echo " SERVER_URL=https://my.mediasoup-demo.org:4443 ROOM_ID=test MEDIA_FILE=./test.mp4 ./gstreamer.sh"
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echo
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echo " where:"
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echo " - SERVER_URL is the URL of the mediasoup-demo API server"
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echo " - ROOM_ID is the id of the mediasoup-demo room (it must exist in advance)"
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echo " - MEDIA_FILE is the path to a audio+video file (such as a .mp4 file)"
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echo
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echo "REQUIREMENTS"
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echo "------------"
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echo
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echo " - gstreamer: stream audio and video (https://gstreamer.freedesktop.org)"
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echo " - httpie: command line HTTP client (https://httpie.org)"
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echo " - jq: command-line JSON processor (https://stedolan.github.io/jq)"
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echo
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}
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echo
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if [ -z "${SERVER_URL}" ] ; then
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>&2 echo "ERROR: missing SERVER_URL environment variable"
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show_usage
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exit 1
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fi
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if [ -z "${ROOM_ID}" ] ; then
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>&2 echo "ERROR: missing ROOM_ID environment variable"
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show_usage
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exit 1
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fi
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if [ -z "${MEDIA_FILE}" ] ; then
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>&2 echo "ERROR: missing MEDIA_FILE environment variable"
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show_usage
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exit 1
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fi
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if [ "$(command -v gst-launch-1.0)" == "" ] ; then
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>&2 echo "ERROR: gst-launch-1.0 command not found, must install GStreamer"
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show_usage
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exit 1
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fi
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if [ "$(command -v http)" == "" ] ; then
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>&2 echo "ERROR: http command not found, must install httpie"
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show_usage
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exit 1
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fi
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if [ "$(command -v jq)" == "" ] ; then
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>&2 echo "ERROR: jq command not found, must install jq"
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show_usage
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exit 1
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fi
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set -e
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BROADCASTER_ID=$(LC_CTYPE=C tr -dc A-Za-z0-9 < /dev/urandom | fold -w ${1:-32} | head -n 1)
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HTTPIE_COMMAND="http --check-status"
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AUDIO_SSRC=1111
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AUDIO_PT=100
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VIDEO_SSRC=2222
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VIDEO_PT=101
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#
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# Verify that a room with id ROOM_ID does exist by sending a simlpe HTTP GET. If
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# not abort since we are not allowed to initiate a room..
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#
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echo ">>> verifying that room '${ROOM_ID}' exists..."
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${HTTPIE_COMMAND} \
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GET ${SERVER_URL}/rooms/${ROOM_ID} > /dev/null
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#
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# Create a Broadcaster entity in the server by sending a POST with our metadata.
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# Note that this is not related to mediasoup at all, but will become just a JS
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# object in the Node.js application to hold our metadata and mediasoup Transports
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# and Producers.
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#
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echo ">>> creating Broadcaster..."
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${HTTPIE_COMMAND} \
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POST ${SERVER_URL}/rooms/${ROOM_ID}/broadcasters \
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id="${BROADCASTER_ID}" \
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displayName="Broadcaster" \
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device:='{"name": "GStreamer"}' \
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> /dev/null
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#
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# Upon script termination delete the Broadcaster in the server by sending a
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# HTTP DELETE.
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#
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trap 'echo ">>> script exited with status code $?"; ${HTTPIE_COMMAND} DELETE ${SERVER_URL}/rooms/${ROOM_ID}/broadcasters/${BROADCASTER_ID} > /dev/null' EXIT
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#
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# Create a PlainTransport in the mediasoup to send our audio using plain RTP
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# over UDP. Do it via HTTP post specifying type:"plain" and comedia:true and
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# rtcpMux:false.
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#
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echo ">>> creating mediasoup PlainTransport for producing audio..."
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res=$(${HTTPIE_COMMAND} \
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POST ${SERVER_URL}/rooms/${ROOM_ID}/broadcasters/${BROADCASTER_ID}/transports \
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type="plain" \
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comedia:=true \
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rtcpMux:=false \
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2> /dev/null)
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#
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# Parse JSON response into Shell variables and extract the PlainTransport id,
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# IP, port and RTCP port.
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#
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eval "$(echo ${res} | jq -r '@sh "audioTransportId=\(.id) audioTransportIp=\(.ip) audioTransportPort=\(.port) audioTransportRtcpPort=\(.rtcpPort)"')"
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#
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# Create a PlainTransport in the mediasoup to send our video using plain RTP
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# over UDP. Do it via HTTP post specifying type:"plain" and comedia:true and
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# rtcpMux:false.
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#
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echo ">>> creating mediasoup PlainTransport for producing video..."
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res=$(${HTTPIE_COMMAND} \
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POST ${SERVER_URL}/rooms/${ROOM_ID}/broadcasters/${BROADCASTER_ID}/transports \
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type="plain" \
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comedia:=true \
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rtcpMux:=false \
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2> /dev/null)
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#
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# Parse JSON response into Shell variables and extract the PlainTransport id,
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# IP, port and RTCP port.
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#
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eval "$(echo ${res} | jq -r '@sh "videoTransportId=\(.id) videoTransportIp=\(.ip) videoTransportPort=\(.port) videoTransportRtcpPort=\(.rtcpPort)"')"
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#
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# Create a mediasoup Producer to send audio by sending our RTP parameters via a
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# HTTP POST.
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#
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echo ">>> creating mediasoup audio Producer..."
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${HTTPIE_COMMAND} -v \
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POST ${SERVER_URL}/rooms/${ROOM_ID}/broadcasters/${BROADCASTER_ID}/transports/${audioTransportId}/producers \
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kind="audio" \
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rtpParameters:="{ \"codecs\": [{ \"mimeType\":\"audio/opus\", \"payloadType\":${AUDIO_PT}, \"clockRate\":48000, \"channels\":2, \"parameters\":{ \"sprop-stereo\":1 } }], \"encodings\": [{ \"ssrc\":${AUDIO_SSRC} }] }" \
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> /dev/null
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#
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# Create a mediasoup Producer to send video by sending our RTP parameters via a
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# HTTP POST.
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#
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echo ">>> creating mediasoup video Producer..."
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${HTTPIE_COMMAND} -v \
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POST ${SERVER_URL}/rooms/${ROOM_ID}/broadcasters/${BROADCASTER_ID}/transports/${videoTransportId}/producers \
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kind="video" \
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rtpParameters:="{ \"codecs\": [{ \"mimeType\":\"video/vp8\", \"payloadType\":${VIDEO_PT}, \"clockRate\":90000 }], \"encodings\": [{ \"ssrc\":${VIDEO_SSRC} }] }" \
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> /dev/null
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#
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# Run gstreamer command and make it send audio and video RTP with codec payload and
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# SSRC values matching those that we have previously signaled in the Producers
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# creation above. Also, tell gstreamer to send the RTP to the mediasoup
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# PlainTransports' ip and port.
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#
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echo ">>> running gstreamer..."
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gst-launch-1.0 \
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rtpbin name=rtpbin \
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filesrc location=${MEDIA_FILE} \
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! qtdemux name=demux \
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demux.video_0 \
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! queue \
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! decodebin \
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! videoconvert \
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! vp8enc target-bitrate=1000000 deadline=1 cpu-used=4 \
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! rtpvp8pay pt=${VIDEO_PT} ssrc=${VIDEO_SSRC} picture-id-mode=2 \
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! rtpbin.send_rtp_sink_0 \
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rtpbin.send_rtp_src_0 ! udpsink host=${videoTransportIp} port=${videoTransportPort} \
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rtpbin.send_rtcp_src_0 ! udpsink host=${videoTransportIp} port=${videoTransportRtcpPort} sync=false async=false \
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demux.audio_0 \
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! queue \
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! decodebin \
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! audioresample \
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! audioconvert \
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! opusenc \
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! rtpopuspay pt=${AUDIO_PT} ssrc=${AUDIO_SSRC} \
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! rtpbin.send_rtp_sink_1 \
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rtpbin.send_rtp_src_1 ! udpsink host=${audioTransportIp} port=${audioTransportPort} \
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rtpbin.send_rtcp_src_1 ! udpsink host=${audioTransportIp} port=${audioTransportRtcpPort} sync=false async=false
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