switch to using FFmpeg for encoding, add audio

1 files changed, 17 insertions, 4 deletions

diff --git a/README b/README
index 70ceb1b..aff9ec2 100644
--- a/README
+++ b/README
@@ -4,9 +4,22 @@ rendertools
 orange box engine demo renderer
 
 usage:
-	rt [-w <width>] [-h <height>] [-g <game>] [-r <fps>] [-s <qvs>] [-q <quality>] OR [-b <bitrate>]
-	path/to/video.mp4 path/to/demo1.dem...
+	rt [-w <width>] [-h <height>] [-g <game>] [-e <encoder>] [-r <fps>] 
+		[-q <crf>] OR [-b <bitrate>] path/to/video.mp4 path/to/demo1.dem...
 
-bitrate is in kbps, quality 1-100
-cannot specify quality and bitrate at the same time
+bitrate is in kbps
+
+encoder: default is libx264
+options:
+	- h264_nvenc
+	- hevc_nvenc
+	- libx264
+	- libx265
+	- h264_amf
+	- h265_amf
+	- av1_amf
+	- libsvtav1
+
+Right now -q only works with libx264.
+	
 demo path is relative to the gamedir (e.g. hl2)