whisper.cpp/scripts/bench-wts.sh

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# Benchmark word-level timestamps for different models
#
# This script takes two arguments
# - an audio file
# - [optional] path to a font file
# I'm using "/usr/share/fonts/truetype/freefont/FreeMono.ttf" on Ubuntu
if [ -z "$1" ]; then
echo "Usage: $0 <audio file> [font file]"
exit 1
fi
#TODO: Make this a command line parameter
#models="base small large"
#models="tiny.en tiny base.en base small.en small medium.en medium large-v1 large"
models="tiny.en base.en small.en medium.en large"
DURATION=$(ffprobe -i $1 -show_entries format=duration -v quiet -of csv="p=0")
DURATION=$(printf "%.2f" $DURATION)
echo "Input file duration: ${DURATION}s"
for model in $models; do
echo "Running $model"
COMMAND="./main -m models/ggml-$model.bin -owts -f $1 -of $1.$model"
if [ ! -z "$2" ]; then
COMMAND="$COMMAND -fp $2"
fi
#TODO: Surface errors better
# TIMEFMT is for zsh, TIMEFORMAT is for bash
EXECTIME=$({ TIMEFMT="%E";TIMEFORMAT=%E; time $COMMAND >/dev/null 2>&1; } 2>&1)
# Slightly different formats between zsh and bash
if [ "${EXECTIME: -1}" == "s" ]; then
EXECTIME=${EXECTIME::-1}
fi
RATIO=$(echo "$DURATION / $EXECTIME" | bc -l)
RATIO=$(printf "%.2f" $RATIO)
echo "Execution time: ${EXECTIME}s (${RATIO}x realtime)"
# If the file already exists, delete it
if [ -f $1.mp4 ]; then
rm $1.mp4
fi
bash $1.$model.wts >/dev/null 2>&1
mv $1.mp4 $1.$model.mp4
ffmpeg -y -f lavfi -i color=c=black:s=1200x50:d=$DURATION -vf "drawtext=fontfile=$2:fontsize=36:x=10:y=(h-text_h)/2:text='ggml-$model - ${EXECTIME}s (${RATIO}x realtime)':fontcolor=lightgrey" $1.$model.info.mp4 >/dev/null 2>&1
done
COMMAND="ffmpeg -y"
for model in $models; do
COMMAND="$COMMAND -i $1.$model.info.mp4 -i $1.$model.mp4"
done
COMMAND="$COMMAND -filter_complex \""
COUNT=0
for model in $models; do
COMMAND="$COMMAND[${COUNT}:v][$(($COUNT+1)):v]"
COUNT=$((COUNT+2))
done
COMMAND="$COMMAND vstack=inputs=${COUNT}[v]\" -map \"[v]\" -map 1:a $1.all.mp4 >/dev/null 2>&1"
echo $COMMAND
# Run the command
eval $COMMAND