path: root/bin/decode+edit+encodeDV

#!/bin/sh

# FIXME: Handle audio

set -e

INPUT=../src/omni/show0/earth.mp4
LOGO=../../content/icon_small.png
OUTPUT=../tmp/omni/show0/earth.dv

HEIGHT=360

# 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

mkdir -p $(dirname "$OUTPUT")

# based on http://www.webmproject.org/docs/encoder-parameters/#real-time-cbr-encoding-and-streaming
# + scale+watermark trick based on http://stackoverflow.com/a/10937357
# + scale to square pixels as needed
# + Add 1s latency (deadline)
ffmpeg -hide_banner -threads auto -y \
 -i "$INPUT" \
 -i "$LOGO" \
 -filter_complex \
 "[0:v]scale=iw*sar*$HEIGHT/ih:$HEIGHT,setsar=1[bg];
  [bg][1:v]overlay=main_w-overlay_w-20:main_h-overlay_h-20[v]" \
 -map '[v]' \
 -target pal-dv "$OUTPUT"