#!/bin/sh
# somagic-record -- Record video from the Somagic EasyCAP and encode to H.264 format
# Written by Jeffry Johnston, 2012. Released to the public domain.
# First run somagic-init, then run this script as root.
# To end recording: killall x264 (or pkill x264).
 
# TV standard: ntsc or pal
STANDARD=ntsc
 
# somagic-capture options:
# S-VIDEO: -s
# CVBS (sharpen): --luminance=2 --lum-aperture=3
# Old sync: --sync=1
SOMAGICOPTS="--sync=1 -s"
 
# x264 video bitrate in kb/s (adjust for space/quality tradeoff):
BITRATE=2000
 
# x264 options (adjust for speed/quality tradeoff):
# --preset: ultrafast, superfast, veryfast, faster, fast, medium, slow, slower, veryslow, placebo
# --threads auto: Use optimum number of threads
X264OPTS="--preset=veryfast --threads auto"
 
# mplayer options:
# Deinterlace: -vf yadif
MPLAYEROPTS="-vf yadif"
 
# Default video and log file prefix:
NAME="video"
 
# Shouldn't need to change below
if [ $# -eq 1  ] ; then
  NAME=$1
elif [ $# -ne 0  ] ; then
  echo "Usage: $0 [VIDEO_PREFIX]"
  exit 1
fi
if [ ntsc = "$STANDARD" ] ; then
  FPS="30000/1001"
  TV="-n"
elif [ pal = "$STANDARD" ] ; then
  FPS="25"
  TV=""
else
  echo "Unknown TV standard: '$STANDARD', must be 'ntsc' or 'pal'."
  exit 1
fi
mkfifo stream.yuv >/dev/null 2>&1
ln -s stream.yuv pipe.y4m >/dev/null 2>&1
x264 $X264OPTS --bitrate "$BITRATE" -o "$NAME.264" pipe.y4m >"$NAME.xlog" 2>&1 &
somagic-capture $TV $SOMAGICOPTS 2>"$NAME.slog" | mplayer -benchmark -nosound -vo yuv4mpeg $MPLAYEROPTS -demuxer rawvideo -rawvideo "$STANDARD:format=uyvy:fps=$FPS" -aspect 4:3 - >"$NAME.mlog" 2>&1 &