Praat script for Synchronizing audios

synchronize_clapper_audios.praat

video = selected ("Sound", 1) 
audio = selected ("Sound", 2) 
select video
maxvideo = Get time of maximum... 0 0 none
select audio
maxaudio = Get time of maximum... 0 0 none
audioend = Get end time
sf = Get sampling frequency
printline
printline Video-Clap: 'maxvideo' Sekunden
printline Audio-Clap: 'maxaudio' Sekunden
if maxaudio > maxvideo 
	diff = maxaudio - maxvideo
	printline Audio-Clap kommt später 
	printline => Schneide am Audio etwas weg
	Extract part... 'diff' 'audioend' Rectangular 1.0 no
	Rename... SynchronisiertesAudio
	plus video
	Combine to stereo
	Rename... KontrollAudioStereo
else
	diff = maxvideo - maxaudio
	printline Video-Clap kommt später 
	printline => Füge Silent vorne ans Audio an
	Create Sound... silent 0 'diff' 'sf' 0
	select audio
	Copy... temp
	plus Sound silent
	Concatenate
	Rename... SynchronisiertesAudio
	plus video
	Combine to stereo
	Rename... KontrollAudioStereo
	select Sound temp
	plus Sound silent
	Remove
endif
printline Differenz: 'diff' Sekunden
plus video

I wrote this Praat script for automatically synchronize the audio of a video and the audio of a microphone. It is essential that you can hear a clap (for example with a movie clapper) in both of the audios. Both audios also need to be mono.