From 992ca80124f251f06c96fe15465880513ad4eee7 Mon Sep 17 00:00:00 2001
From: Jonas Smedegaard <dr@jones.dk>
Date: Thu, 8 Jun 2017 17:19:36 +0200
Subject: Make GOP optional, and set only for H.264 (not VP8).

---
 bin/stream | 14 +++++++-------
 1 file changed, 7 insertions(+), 7 deletions(-)

diff --git a/bin/stream b/bin/stream
index 154d2a5..1e26d11 100755
--- a/bin/stream
+++ b/bin/stream
@@ -228,18 +228,18 @@ encode_opus() {
 encode_aac() {
  echo_n "-codec:a aac -strict experimental -ac $ACHANNELS -ar $AFRAMERATE_AAC -b:a $((ACHANNELS*ABITRATE_AAC))"
 }
-encode_vp8() { bitrate=$1; speed=$2;
+encode_vp8() { bitrate=$1; speed=$2; gop=$3;
  echo_n "-codec:v vp8 -quality realtime -deadline 1000000 -cpu-used $speed \
  -b:v $bitrate -minrate $bitrate -maxrate $bitrate \
  -undershoot-pct 95 -bufsize $((6000*bitrate/1000)) -rc_init_occupancy $((4000*bitrate/1000)) \
  -max-intra-rate 0 \
- -qmin 4 -qmax 56 \
- -force_key_frames expr:gte(t,n_forced*2)"
+ -qmin 4 -qmax 56"
+[ -z "$gop" ] || echo_n " -force_key_frames expr:gte(t,n_forced*$gop)"
 }
-encode_x264() { bitrate=$1; speed=$2;
+encode_x264() { bitrate=$1; speed=$2; gop=$3;
  echo_n "-codec:v libx264 -preset $speed -tune zerolatency \
- -maxrate $bitrate -bufsize $((bitrate*2)) -crf 23 \
- -force_key_frames expr:gte(t,n_forced*2)"
+ -maxrate $bitrate -bufsize $((bitrate*2)) -crf 23"
+[ -z "$gop" ] || echo_n " -force_key_frames expr:gte(t,n_forced*$gop)"
 }
 
 # * routing based on http://trac.ffmpeg.org/wiki/Creating%20multiple%20outputs#Teepseudo-muxer
@@ -309,5 +309,5 @@ ffmpeg -hide_banner -threads auto \
  ${HASAUDIO:+\
  $(encode_aac) } \
  ${HASVIDEO:+\
- $(encode_x264 "$VBITRATE" "$SPEED_X264") } \
+ $(encode_x264 "$VBITRATE" "$SPEED_X264" 2) } \
  $(mux "$TARGETS_MPEG") }
-- 
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