sample-multi-transcode-HEVC-1080p.sh

#!/bin/bash
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bitrate=${BITRATE:-3000}
preset=${PRESET:-veryfast}
async=${ASYNC:-1}
stream=bbb_sunflower_1080p_60fps_4Mbps_38kframes.h265

# process cmdline options
nstreams=$1
if [[ -z "$1" ]]; then
  echo $(basename $0) "<num-of-streams> [<stream>]"
  exit 0
fi
! [[ -z "$2" ]] && stream=$2
! [[ -e $stream ]] && download-streams.sh $stream

echo "Running 1080p HEVC-HEVC 1x$nstreams transcoding with SMT for $stream stream..."

# get devices
devices=( $(ls /dev/dri/renderD*) )
ndevs=${#devices[@]}
echo "Number of detected devices: $ndevs"

# set output
output="/dev/null"
[[ $nstreams = 1 ]] && output="$(basename $stream).hevc.smt.h265"

# encode loop
for ((i=0; i<$nstreams; i++)); do

  device="${devices[((i % ndevs))]}"

  sample_multi_transcode -device $device -i::h265 $stream -hw -async $async -lowpower:on -u $preset -b $bitrate -lad 8 -vbr \
    -extbrc::implicit -num_ref 4 -gop_size 256 -dist 8 -AdaptiveI:on -AdaptiveB:on -NalHrdConformance:off -VuiNalHrdParameters:off \
    -MaxKbps $((bitrate * 2)) -hrd $((bitrate / 2)) -InitialDelayInKB $((bitrate / 4)) -n 6000 \
    -o::h265 $output | tee $(basename $stream).${nstreams}.${i}.dev$((i % ndevs)).hevc.smt.log &

done

wait
echo "Finished 1080p HEVC-HEVC 1x$nstreams transcoding with SMT for $stream stream"
cat $(basename $stream).${nstreams}.*.dev*.hevc.smt.log | grep PASSED | grep fps