diff --git a/youtube-dl-install.sh b/youtube-dl-install.sh
index 9afc221..3d426ea 100644
--- a/youtube-dl-install.sh
+++ b/youtube-dl-install.sh
@@ -64,6 +64,11 @@ EOF
 f_TouchePourContinuer
 clear
 
+if ! which ffmpeg ; then
+echo "ffmpeg n'est pas installé, mais est requis.";exit
+exit
+fi
+
 #---------------------------------------------------------
 # Installation youtube-dl
 #---------------------------------------------------------
@@ -76,6 +81,7 @@ f_youtubedlinstall
 echo "Ajout dans bashrc...";sleep 2
 
 cat << "EOF" >> $HOME/.bashrc
+### YOUTUBE-DL ###
 alias dl_video="~/bin/yt-dlp -f 'bestvideo[height<=480]+bestaudio/best[height<=480]' --restrict-filenames --output \"%(title)s\""
 alias dl_video_original="~/bin/yt-dlp --restrict-filenames --output \"%(title)s\""
 alias dl_musique="~/bin/yt-dlp --extract-audio --audio-format mp3 --restrict-filenames --output \"%(title)s.%(ext)s\""