vid_compress



    1 #!/usr/bin/env bash
    2 #
    3 # This script is intended for provide a "sane" video conversion and
    4 # recompression. It is useful for recompressing high quality video taken with a
    5 # camera so less storage is taken.
    6 #
    7 # Note: This does not delete the original.
    8 #
    9 # Requirements:
   10 #   ffmpeg
   11 #   libtheora
   12 
   13 new_ext="ogv"
   14 
   15 if [[ -z $1 ]]; then
   16   echo "Please specify a file to compress"
   17   exit 1
   18 fi
   19 
   20 orig="${1}"
   21 ext_index=""
   22 
   23 # Note that we're going backwards (right to left) here so we don't stop early
   24 # on filenames with multiple periods in their name.
   25 for (( i=${#orig}; i>0; i-- )); do
   26   if [[ ${orig:$i:1} == "." ]]; then
   27     # Set where the extension starts so we know what to replace for the new
   28     # extension
   29     ext_index=$i
   30     break
   31   fi
   32 done
   33 
   34 # Exit of an extension couldn't be determined
   35 if [[ ${ext_index} == "" ]]; then
   36   echo "Fatal Error: Filename could not be determined for file ${orig}."
   37   exit 1
   38 fi
   39 
   40 # Set the new filename for output
   41 # TODO: Make the extension a little less hard coded
   42 new=${orig:0:$ext_index}.${new_ext}
   43 
   44 echo -e "\bBeginning recompression of ${orig}...."
   45 # Assume theora/vorbis for now
   46 ffmpeg -i "${orig}"  -loglevel error -codec:a libvorbis -codec:v libtheora -qscale:a 7 -qscale:v 7 "${new}"