join-gopro-clips.sh

join-gopro-clips.sh

#!/bin/sh

# example usage:
# . join-gopro-clips.sh /f/DCIM/111GOPRO/*574*MP4
# this will generate and execute a ffmpeg command:
# /cygdrive/c/ProgramData/chocolatey/bin/ffmpeg -i 'F:\DCIM\111GOPRO\GOPR0574.MP4' -filter_complex '[0:v]scale=-1:720[v0];[v0][0:a]concat=n=1:v=1:a=1[v][a]' -r 18 -pix_fmt yuv420p -map '[v]' -map '[a]' -vcodec libx264 -preset veryslow 'C:\Temp\GOPR0574.MP4'

#function join-gopro-clips() {
  i=0
  c=$(which ffmpeg)
  for f in "$@"; do ((++i)) && c="${c} -i $f"; done
  #for f in "$@"; do ((++i)) && c="${c} -i '$(cygpath -w -- $f)'"; done # for cygwin


  f=''
  for (( j = 0; j < i; j++ )); do f="${f}[${j}:v]scale=-1:720[v${j}];"; done
  for (( j = 0; j < i; j++ )); do f="${f}[v${j}][${j}:a]"; done
  # for (( j = 0; j < i; j++ )); do f="${f}[${j}:v]"; done
  f="${f}concat=n=${i}:v=1:a=1[v][a]"

  c="${c} -filter_complex '${f}' -r 18 -pix_fmt yuv420p -map '[v]' -map '[a]' -vcodec libx264 -preset veryslow $(basename $1)"
  #c="${c} -filter_complex '${f}' -r 18 -pix_fmt yuv420p -map '[v]' -map '[a]' -vcodec libx264 -preset veryslow '$(cygpath -w -- $(pwd)/$(basename $1))'" # for cygwin

  echo $c
  eval $c
  touch -r $1 $(basename $1)
#}