add info to readme

shell/bash/avt/README.md

@@ -1,14 +1,14 @@
 # avt: ali's (h264) video tool
-    
+
     avt: ali's (h264) video tool
     Usage: ./avt rec|record
     	   ./avt nvid|normalize
     	   ./avt help
     Environment variables:
     avt_cl: enable opencl [set to enable]
-    
+
     Commands:
-    
+
     ./avt rec / record
     Record screen and audio in very high quality
     Usage: ./avt rec [output directory]
@@ -21,7 +21,7 @@
     rec_adev: set pulseaudio source devices (default: default and first running monitor) [array]
     rec_ar: set audio samplerate (default: 192000)
     rec_normalize: immediately start nvid after recording ends [set to enable]
-    
+
     ./avt nvid / normalize
     Normalize and compress video & audio
     Usage: ./avt nvid <file> [outfile]
@@ -35,3 +35,15 @@
     nvid_ac: set audio codec (default: aac)
     nvid_ba: set audio bitrate (default: 160k)
     nvid_ar: set audio samplerate (default: 48000)
+
+# Dependencies
+
+-   `bash`
+-   `ffmpeg`
+-   `perl`
+-   `pactl`
+
+# Requirements
+
+This assumes you use X11, PipeWire and pipewire-pulse.  
+You also need a pretty fast disk and a lot of free space to record with this tool with the default settings. Consider increasing `rec_crf` if you don't have those.