half-baked/ffmpeg-x264-2pass.sh

   1 #!/bin/bash
   2
   3 set -u
   4 set -e
   5
   6 if [ $# -lt 4 ]
   7 then
   8         echo "$0 <input.avi> <video-bitrate> <audio-bitrate> <output.mp4> [<ffmpeg-options>]" >&2
   9         exit 1
  10 fi
  11
  12 acodec=aac
  13 #acodec=libvo_aacenc
  14
  15 input=$1
  16 shift
  17 vbr=${1}k
  18 shift
  19 abr=${1}
  20 shift
  21 out=$1
  22 shift
  23
  24 declare opts=()
  25 #opts=(-i "$input" -c:v libx264 -preset medium -b:v "$vbr" -c:a copy -f mp4)
  26 #opts=(-i "$input" -c:v libx264 -preset medium -b:v "$vbr" -c:a $acodec -b:a "$abr" -f mp4)
  27 opts+=(-i "$input" -c:v libx264 -preset medium -b:v "$vbr" -c:a $acodec)
  28 if [ "${abr}" != '' ]; then opts+=(-b:a "$abr"k); fi
  29 opts+=(-f mp4)
  30
  31
  32 #FFMPEG=${FFMPEG:-ffmpeg3.2.4}
  33 #FFMPEG=ffmpeg2.6
  34 FFMPEG=ffmpeg
  35 #FFMPEG="qemu-i386 /srv/bin/ffmpeg2.6"
  36
  37 $FFMPEG "${opts[@]}" -x264-params pass=1 "$@" -y /dev/null
  38
  39 $FFMPEG "${opts[@]}" -x264-params pass=2 "$@" "$out"