From 4cf5f65c2eb911b3f94cbbaa8480b588173a3fd8 Mon Sep 17 00:00:00 2001
From: Jonas Smedegaard <dr@jones.dk>
Date: Tue, 16 May 2017 13:35:44 +0200
Subject: Resolve bitrate based on height.

---
 bin/stream | 15 ++++++++++++---
 1 file changed, 12 insertions(+), 3 deletions(-)

(limited to 'bin/stream')

diff --git a/bin/stream b/bin/stream
index 4c684eb..8a9c4e3 100755
--- a/bin/stream
+++ b/bin/stream
@@ -81,9 +81,18 @@ AFRAMERATE=24000
 ABITRATE=16000
 
 # FIXME: support multiple heights
-HEIGHTS_WEBM=234
-HEIGHTS_MPEG=234
-VBITRATE=145000
+HEIGHT=234
+HEIGHTS_WEBM="$HEIGHT"
+HEIGHTS_MPEG="$HEIGHT"
+
+# inspired by Apple HLS recommendations
+  if [ $HEIGHT -le 234 ]; then VBITRATE=145000;
+elif [ $HEIGHT -le 270 ]; then VBITRATE=365000;
+elif [ $HEIGHT -le 360 ]; then VBITRATE=730000;
+elif [ $HEIGHT -le 432 ]; then VBITRATE=1100000;
+elif [ $HEIGHT -le 540 ]; then VBITRATE=2000000;
+elif [ $HEIGHT -le 720 ]; then VBITRATE=3000000;
+fi
 
 # shellcheck disable=SC2048,SC2059
 echo_n() {
-- 
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