From cdbf4dee39cdd3dc083299d88d619effc1e72e14 Mon Sep 17 00:00:00 2001
From: Jonas Smedegaard <dr@jones.dk>
Date: Thu, 18 May 2017 09:39:53 +0200
Subject: Generalize encodings as functions.

---
 bin/loop+encode+stream | 19 +++++++++++++------
 1 file changed, 13 insertions(+), 6 deletions(-)

(limited to 'bin/loop+encode+stream')

diff --git a/bin/loop+encode+stream b/bin/loop+encode+stream
index 3906552..5893ed3 100755
--- a/bin/loop+encode+stream
+++ b/bin/loop+encode+stream
@@ -55,6 +55,17 @@ elif [ $BITS -le 921600 ]; then # 720p → 921600
  SPEED_VP8=15
 fi
 
+encode_opus() {
+ echo_n "-codec:a libopus -ac $ACHANNELS -ar $AFRAMERATE_OPUS -b:a $ABITRATE_OPUS"
+}
+encode_vp8() { bitrate=$1; speed=$2;
+ 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 $((4000*bitrate/1000)) \
+ -max-intra-rate 0 \
+ -qmin 4 -qmax 56"
+}
+
 # based on http://www.webmproject.org/docs/encoder-parameters/#real-time-cbr-encoding-and-streaming
 # + Add 1s latency (deadline)
 # + Use same RTP payload types as GStreamer
@@ -62,12 +73,8 @@ ffmpeg -hide_banner -threads auto -re \
  -stream_loop -1 -i "$INPUT" \
  -vf format=pix_fmts=yuv420p \
  -map '0:a' \
- -codec:a libopus -ac "$ACHANNELS" -ar "$AFRAMERATE_OPUS" -b:a "$ABITRATE_OPUS" \
+ $(encode_opus) \
  -f rtp -payload_type 111 "rtp://$IP:$FIRSTPORT?pkt_size=1200" \
  -map '0:v' \
- -codec:v vp8 -quality realtime -deadline 1000000 -cpu-used "$SPEED_VP8" \
- -b:v "$VBITRATE" -minrate "$VBITRATE" -maxrate "$VBITRATE" \
- -undershoot-pct 95 -bufsize $((6000*VBITRATE/1000)) -rc_init_occupancy $((4000*VBITRATE/1000)) \
- -max-intra-rate 0 \
- -qmin 4 -qmax 56 \
+ $(encode_vp8 "$VBITRATE" "$SPEED_VP8") \
  -f rtp -payload_type 100 "rtp://$IP:$((FIRSTPORT+2))?pkt_size=1200"
-- 
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