can't record screen using ffmpeg, including microphone and bluetooth headset audio, in sync

I'm trying to record my screen using ffmpeg , but including the audio from the computer microphone and the computer audio (the one I hear for my bluetooth headset). I can get the file with this command: ffmpeg -video_size 1920x1080 -framerate 24 -f x11grab -i :1.0+0,0 -f pulse -ac 2 -i $(pactl list short sources | grep -i alsa_input | awk '{print $2}') -f pulse -i $(pactl list short sources | grep -i blue | awk '{print $2}') -filter_complex [1:a][2:a]amerge=inputs=2[a] -map 0:v -map [a] -ac 2 -c:v libx264 -crf 23 -preset fast -c:a aac -b:a 192k -strict experimental file.mp4 but the audio of bo

Question by kurokirasama on Super User, licensed CC BY-SA. We show a short excerpt and link to the original thread as credit.