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livestream : handle ffmpeg errors gracefully and stabilize transcript

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Georgi Gerganov 2022-12-01 20:49:09 +02:00
parent 4f7363077f
commit 57e0e6b700
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1 changed files with 25 additions and 15 deletions
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examples/livestream.sh
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@ -53,36 +53,46 @@ if [[ ! " ${models[@]} " =~ " ${model} " ]]; then
exit 1
fi
running=1
trap "running=0" SIGINT SIGTERM
printf "[+] Transcribing stream with model '$model', step_s $step_s (press Ctrl+C to stop):\n\n"
# continuous stream in native fmt (this file will grow forever!)
ffmpeg -loglevel quiet -y -re -probesize 32 -i $url -c copy /tmp/whisper-live0.${fmt} &
ffmpeg -loglevel quiet -y -re -probesize 32 -i $url -c copy /tmp/whisper-live0.${fmt} &
if [ $? -ne 0 ]; then
printf "Error: ffmpeg failed to capture audio stream\n"
exit 1
fi
printf "Buffering audio. Please wait...\n"
# For some reason, the initial buffer can end up smaller than step_s (even though we sleep for step_s)
sleep $(($step_s*2))
printf "Buffering audio. Please wait...\n\n"
sleep $(($step_s))
# do not stop script on error
set +e
i=0
while [ true ]; do
# a handy bash built-in, SECONDS,
# > "This variable expands to the number of seconds since the shell was started. Assignment to this variable resets the count to the value assigned, and the expanded value becomes the value assigned
# > plus the number of seconds since the assignment."
SECONDS=0
SECONDS=0
while [ $running -eq 1 ]; do
# extract the next piece from the main file above and transcode to wav. -ss sets start time and nudges it by -0.5s to catch missing words (??)
if [ $i -gt 0 ]; then
ffmpeg -loglevel quiet -noaccurate_seek -i /tmp/whisper-live0.${fmt} -y -ar 16000 -ac 1 -c:a pcm_s16le -ss $(($i*$step_s-1)).5 -t $step_s /tmp/whisper-live.wav
else
ffmpeg -loglevel quiet -noaccurate_seek -i /tmp/whisper-live0.${fmt} -y -ar 16000 -ac 1 -c:a pcm_s16le -ss $(($i*$step_s)) -t $step_s /tmp/whisper-live.wav
fi
err=1
while [ $err -ne 0 ]; do
if [ $i -gt 0 ]; then
ffmpeg -loglevel quiet -v error -noaccurate_seek -i /tmp/whisper-live0.${fmt} -y -ar 16000 -ac 1 -c:a pcm_s16le -ss $(($i*$step_s-1)).5 -t $step_s /tmp/whisper-live.wav 2> /tmp/whisper-live.err
else
ffmpeg -loglevel quiet -v error -noaccurate_seek -i /tmp/whisper-live0.${fmt} -y -ar 16000 -ac 1 -c:a pcm_s16le -ss $(($i*$step_s)) -t $step_s /tmp/whisper-live.wav 2> /tmp/whisper-live.err
fi
err=$(cat /tmp/whisper-live.err | wc -l)
done
./main -t 8 -m ./models/ggml-base.en.bin -f /tmp/whisper-live.wav --no-timestamps -otxt 2> /tmp/whispererr | tail -n 1
while [ $SECONDS -lt $step_s ]; do
while [ $SECONDS -lt $((($i+1)*$step_s)) ]; do
sleep 1
done
((i=i+1))
done
killall -v ffmpeg
killall -v main