diff --git a/shell/bash/avt/README.md b/shell/bash/avt/README.md
index c8bd406..a37c068 100644
--- a/shell/bash/avt/README.md
+++ b/shell/bash/avt/README.md
@@ -13,8 +13,10 @@
     Record screen and audio in very high quality
     Usage: ./avt rec [output directory]
     Enviroment variables:
+    rec_out: set output file (default: $HOME/Desktop/$(date +%F_%H-%M-%S).mkv)
     rec_fps: set framerate (default: 60)
     rec_res: set resolution (default: 1920x1080)
+    rec_display: choose the display to record (default: $DISPLAY)
     rec_crf: set crf, use 0 for lossless (default: 6)
     rec_adev: set pulseaudio source devices (default: default and first running monitor) [array]
     rec_ar: set audio samplerate (default: 192000)
@@ -33,4 +35,3 @@
     nvid_ac: set audio codec (default: aac)
     nvid_ba: set audio bitrate (default: 160k)
     nvid_ar: set audio samplerate (default: 48000)
-    
\ No newline at end of file
diff --git a/shell/bash/avt/avt b/shell/bash/avt/avt
index 060096f..2f8851e 100755
--- a/shell/bash/avt/avt
+++ b/shell/bash/avt/avt
@@ -21,6 +21,7 @@ Enviroment variables:
 rec_out: set output file (default: $HOME/Desktop/$(date +%F_%H-%M-%S).mkv)
 rec_fps: set framerate (default: 60)
 rec_res: set resolution (default: 1920x1080)
+rec_out: set output file (default: $HOME/Desktop/$(date +%F_%H-%M-%S).mkv)
 rec_crf: set crf, use 0 for lossless (default: 10)
 rec_adev: space separated pulseaudio source devices (default: default and first running monitor)
 rec_ar: set audio samplerate (default: 192000)
@@ -76,7 +77,7 @@ foreach (@sinks) {
 
 	# shellcheck disable=SC2086
 	ffmpeg -y -thread_queue_size 64 \
-		-f x11grab -r "${rec_fps:-60}" -s "${rec_res:-1920x1080}" -i :0 \
+		-f x11grab -r "${rec_fps:-60}" -s "${rec_res:-1920x1080}" -i "${rec_display:-$DISPLAY}" \
 		$pulse_inputs \
 		-filter_complex "$audio_filter" \
 		-c:a pcm_s16le -ar "${rec_ar:-192000}" \