Some useful bash script for me

cross_compile.sh

# Script fragment of cross-compiling for Synology NAS

# cross compile toolchain installed at /opt/i686-pc-linux-gnu/
ln -s /opt/i686-pc-linux-gnu/bin/i686-pc-linux-gnu-ar /usr/local/bin/i686-pc-linux-gnu-ar
ln -s /opt/i686-pc-linux-gnu/bin/i686-pc-linux-gnu-c++ /usr/local/bin/i686-pc-linux-gnu-c++
ln -s /opt/i686-pc-linux-gnu/bin/i686-pc-linux-gnu-cpp /usr/local/bin/i686-pc-linux-gnu-cpp
ln -s /opt/i686-pc-linux-gnu/bin/i686-pc-linux-gnu-g++ /usr/local/bin/i686-pc-linux-gnu-g++
ln -s /opt/i686-pc-linux-gnu/bin/i686-pc-linux-gnu-gcc /usr/local/bin/i686-pc-linux-gnu-gcc
ln -s /opt/i686-pc-linux-gnu/bin/i686-pc-linux-gnu-gcc-ar /usr/local/bin/i686-pc-linux-gnu-gcc-ar
ln -s /opt/i686-pc-linux-gnu/bin/i686-pc-linux-gnu-gcc-nm /usr/local/bin/i686-pc-linux-gnu-gcc-nm
ln -s /opt/i686-pc-linux-gnu/bin/i686-pc-linux-gnu-gcc-ranlib /usr/local/bin/i686-pc-linux-gnu-gcc-ranlib
ln -s /opt/i686-pc-linux-gnu/bin/i686-pc-linux-gnu-ld /usr/local/bin/i686-pc-linux-gnu-ld
ln -s /opt/i686-pc-linux-gnu/bin/i686-pc-linux-gnu-ldd /usr/local/bin/i686-pc-linux-gnu-ldd
ln -s /opt/i686-pc-linux-gnu/bin/i686-pc-linux-gnu-nm /usr/local/bin/i686-pc-linux-gnu-nm
ln -s /opt/i686-pc-linux-gnu/bin/i686-pc-linux-gnu-objcopy /usr/local/bin/i686-pc-linux-gnu-objcopy
ln -s /opt/i686-pc-linux-gnu/bin/i686-pc-linux-gnu-objdump /usr/local/bin/i686-pc-linux-gnu-objdump
ln -s /opt/i686-pc-linux-gnu/bin/i686-pc-linux-gnu-ranlib /usr/local/bin/i686-pc-linux-gnu-ranlib
ln -s /opt/i686-pc-linux-gnu/bin/i686-pc-linux-gnu-strip /usr/local/bin/i686-pc-linux-gnu-strip

# set common environment
export AR=i686-pc-linux-gnu-ar
export CC=i686-pc-linux-gnu-gcc
export LD=i686-pc-linux-gnu-ld
export RANLIB=i686-pc-linux-gnu-ranlib
export CFLAGS="-I/opt/i686-pc-linux-gnu/i686-pc-linux-gnu/include"
export LDFLAGS="-L/opt/i686-pc-linux-gnu/i686-pc-linux-gnu/lib"
export PKG_CONFIG_PATH="/opt/i686-pc-linux-gnu/i686-pc-linux-gnu/lib/pkgconfig"

# compile zlib
./configure --prefix=/opt/i686-pc-linux-gnu/i686-pc-linux-gnu
make
make install

# compile openssl
./Configure --prefix=/opt/i686-pc-linux-gnu/i686-pc-linux-gnu os/compiler:i686-pc-linux-gnu-gcc
make
make install

# compile aria2
./configure --host=i686-pc-linux-gnu --prefix=/root/synology/usr/local --with-openssl --with-libz --without-appletls --without-wintls --without-gnutls
make
make install

# compile pcre
./configure --host=i686-pc-linux-gnu --prefix=/opt/i686-pc-linux-gnu/i686-pc-linux-gnu
make
make install

# compile shadowsocks-libev
./configure --host=i686-pc-linux-gnu --target=i686-pc-linux-gnu --prefix=/root/synology/usr/local --disable-documentation --with-pcre=/opt/i686-pc-linux-gnu/i686-pc-linux-gnu --with-zlib=/opt/i686-pc-linux-gnu/i686-pc-linux-gnu --with-openssl=/opt/i686-pc-linux-gnu/i686-pc-linux-gnu
make
make install

re-encode.sh

#!/bin/sh

# Script for re-encoding videos in "[RefArain] A.I.C.O Incarnation (01-12) [GB_MKV][720p]"
#   1. Encode audio track from E-AC3 to AAC 
#   2. Update mkv metadata

function _logging()
{
  timestamp=`date '+%Y-%m-%d %H:%M:%S'`
  echo "[$timestamp] $1"
}

function _logging_debug()
{
  _logging "\x1B[94m$1\x1B[0m"
}

function _logging_info()
{
  _logging "\x1B[92m$1\x1B[0m"
}

function _convert_one()
{
  _logging_info "Processing file: $1"
  # get episode number
  episode=${1:29:2}
  temp_file="aico_$episode.mkv"
  # encoding audio
  _logging_debug "Encoding file ..."
  ffmpeg -i $1 -loglevel quiet -c:v copy -c:s copy -c:a libfdk_aac -profile:a aac_he -b:a 128k $temp_file
  # edit properties
  _logging_debug "Updating metadata ..."
  mkvpropedit $temp_file --quiet --edit info --set "title=A.I.C.O Incarnation - $episode" --delete segment-uid --edit track:a1 --set "language=jpn" --edit track:s1 --set "language=chi"
  # calculate checksum
  _logging_debug "Calculating checksum ..."
  checksum=`crc32 $temp_file | awk '{print toupper($0)}'`
  # rename output file
  output_file="[A.I.C.O_Incarnation][$episode][H264_AAC][720P][$checksum].mkv"
  mv $temp_file $output_file
  _logging_info "File saved to: $output_file"
}

if [ $# -gt 0 ]; then
  for input_file in $*; do
    _convert_one "$input_file"
  done
fi