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#!/bin/sh
set -e
SAMPLE='/usr/share/forensics-samples/original-files/movie2/movie-hello.mp4'
IP='127.0.0.1'
PORT_SENDER='6789'
PORT_RIST='19876'
PORT_RECEIVER='9876'
BANDWIDTH='2560000'
PASSPHRASE='SecretPassPhrase'
SLEEPTIME='5'
WORKDIR="$(mktemp -d)"
trap "rm -rf $WORKDIR" 0 INT QUIT ABRT PIPE TERM
cd "$WORKDIR"
# based on https://code.videolan.org/rist/librist/-/wikis/rist-sender-and-receiver-Command-Line-Examples-as-of-v.-0.2.0
# testing the following flow, with ffmpeg providing and - at the end - receiving the stream:
#
# FFMPEGSENDER RISTSENDER RISTRECEIVER FFMPEGRECEIVER
# +----------+ +------------+ +--------------+ +------------+
# | | UDP | | RIST | | UDP | |
# | ffmpeg +----->| ristsender +------>| ristreceiver +----->| ffmpeg |
# | | | | | | | |
# +----------+ +------------+ +--------------+ +------------+
case "$1" in
'psk_enc')
RIST_EXTRAOPTS="&congestion-control=1&aes-type=128&secret=$PASSPHRASE"
RIST_PROFILE='1' # Main
;;
'simple')
RIST_EXTRAOPTS=''
RIST_PROFILE='0' # Simple
;;
*)
echo 'Unknown test profile, exiting.'
exit 1
;;
esac
# listen for an incoming UDP stream to copy (w/ overwrite) to a file; close stdin to allow ffmpeg to run in the background
ffmpeg -y -i "udp://$IP:$PORT_RECEIVER" -c copy file://$(pwd)/sample.mp4 > FFMPEGRECEIVER.log 2>&1 < /dev/null &
FFMPEGRECEIVER=$!
# let ristreceiver receive an incoming RIST stream and relay to UDP above
ristreceiver -i "rist://@$IP:$PORT_RIST?cname=RECEIVER01&bandwidth=$BANDWIDTH$RIST_EXTRAOPTS" -o "udp://$IP:$PORT_RECEIVER" -p "$RIST_PROFILE" -v 4 > RISTRECEIVER.log 2>&1 &
RISTRECEIVER=$!
# let ristsender relay the UDP stream via RIST above
ristsender -i "udp://@$IP:$PORT_SENDER" -o "rist://$IP:$PORT_RIST?cname=SENDER01&bandwidth=$BANDWIDTH$RIST_EXTRAOPTS" -p "$RIST_PROFILE" -v 4 > RISTSENDER.log 2>&1 &
RISTSENDER=$!
# grant the preceding commands some time to safely initialize
sleep "$SLEEPTIME"
# send sample file into UDP stream
ffmpeg -i "$SAMPLE" -f mpegts "udp://$IP:$PORT_SENDER" > FFMPEGSENDER.log 2>&1
# grant the receivers some time to finish before killing them
sleep "$SLEEPTIME"
kill -KILL $RISTSENDER $RISTRECEIVER $FFMPEGRECEIVER
# did we actually receive a video? streaming it will change it, so we cannot just compare the files ...
file --mime sample.mp4 | grep '^sample.mp4: video/mp4' && echo "OK: found a streamed video:"
ls -al "$SAMPLE" sample.mp4
# output logs for reference
for i in FFMPEGSENDER RISTSENDER RISTRECEIVER FFMPEGRECEIVER; do
echo "===== $i logs ====="
cat "$i.log"
echo
done
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