record a pulsaudio telegram chat and whisper transcription based on recent gentoo build

telegram-record.bash

#!/bin/bash

# Define the Whisper function
whisp() {
  source ~/extras/venv/bin/activate # ymmv, this is my "userspace" requirement
  whisper --model medium.en --output_format=all $@ #pip3 install openai-whisper to get this
}

# Get the sink input index for 'telegram-desktop'
sink_input_index=$(pactl list short  | grep 'telegram-desktop' | cut -f1|head -n1 )
full_volname=$( date -Is|sed -e 's,\W,_,g').wav
parecord -d $sink_input_index >$full_volname  &

echo writing index $sink_input_index to ${full_volname}

# Get the process ID of the parecord command
recording_pid=$!

# Prompt the user to stop recording
echo "Press enter key to stop recording..."
read -n1 -r -p "" key

# Send the SIGINT signal to stop the recording
kill -INT $recording_pid

# Wait for a moment for file sync
sleep 1

# Error handling for Whisper
whisp $full_volname || { echo "Whisper failed."; exit 1; }

# Rename the file
new_filename="${full_volname/%.wav/.mkv}" # Change the extension to .mkv
subtitles="${full_volname/%.wav/.vtt}" # Change the extension to .mkv

#add -i mylogo.png below to make a video
set -x 
 if ffmpeg -i $full_volname -c:a libopus  -i $subtitles  $new_filename; then
  echo "Conversion and muxing successful. New file: $new_filename, cleaning up"
  rm $full_volname
else
  echo "Conversion or muxing failed."
  exit 1
fi
set +x