initial commit

README.md

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+# SplitVideo
+
+## Usage
+
+Start the app via desktop entry:
+
+![](screenshot_start-app.jpeg)
+
+In the main window, select a source video and enter the time at which you want to split the video into two pieces. The original file will not be modified.
+
+![](screenshot_main-gui.jpeg)
+
+You will be informed in a small message window when the conversation is done and there will be two new files (with an appended prefix) next to your source video:
+
+![](screenshot_success.jpeg)
+
+## TODO
+
+* `splitVideoGUI`
+	- ckeck if `yad` is installed
+* `splitVideo`
+	- check if `ffmpeg` is installed
+	
+* check dependencies in `install.sh`

install.sh

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+#!/bin/bash
+
+# installation directory (should be included in your PATH variable)
+PROGRAM_DIR="/usr/local/bin"
+# base path where files to install are located
+FILE_LOCATION="."
+# names of files to install
+# The LAST file must be the executable (with GUI)
+FILE_NAMES=( "splitVideo" "splitVideoGUI" )
+# .desktop directory 
+DESKTOP_DIR="/usr/share/applications"
+
+
+
+function createDesktopEntry(){
+  
+  # .desktop categories:
+  # https://specifications.freedesktop.org/menu-spec/latest/apa.html#main-category-registry
+  
+  printf "Creating desktop entry for executable %s\n" "$PROGRAM_DIR/${FILE_NAMES[-1]}"
+    
+cat <<EOF > "$DESKTOP_DIR/${FILE_NAMES[-1]}.desktop"
+[Desktop Entry]
+Version=1.0
+Name=SplitVideo
+Comment=Splits a video up in two parts at specific time
+Categories=AudioVideo;Video;Utility;
+Exec=${FILE_NAMES[-1]}
+Icon=yad
+Terminal=false
+Type=Application
+StartupNotify=true
+EOF
+}
+
+function validateDesktopEntry(){
+  printf "\n========= Validating Desktop Entry =========\n\n"
+  desktop-file-validate "$DESKTOP_DIR/${FILE_NAMES[-1]}.desktop"
+  printf "========= ======================== =========\n\n"
+}
+
+function main(){
+  # copy files to /usr/local/bin
+  # and make them executable
+
+  for FILE_NAME in "${FILE_NAMES[@]}"; do
+    cp "$FILE_LOCATION/$FILE_NAME" "$PROGRAM_DIR" || exit "$?"
+    chmod +x "$PROGRAM_DIR/$FILE_NAME" || exit "$?"
+  done
+  
+  createDesktopEntry || exit "$?"
+
+  # update desktop entries
+  # https://wiki.archlinux.org/index.php/Desktop_entries#Update_database_of_desktop_entries
+  update-desktop-database "$DESKTOP_DIR"
+  
+  # validate desktop entry
+  # https://wiki.archlinux.org/index.php/Desktop_entries#Validation
+  validateDesktopEntry
+
+  echo "Installation was successfull"
+  return 0
+}
+
+main "$@"

splitVideo

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+#!/bin/bash
+
+function split(){
+  local src="$1"
+  local dst="$2"
+  local start="$3"
+  local duration="$4"
+  
+  # ffmpeg param "-n"
+  # Do not overwrite output files, and exit immediately if
+  # a specified output file already exists.
+
+
+  if [ "$4" -gt 0 ] ; then
+    # Take section from (start) to (start + duration)
+    ffmpeg -n -i "${src}" -ss "$start" -t "${duration}" -c copy "${dst}"
+    errno="$?"
+  else
+    # $4 is empty or <1
+    # Take section from (start) until (end of video)
+    ffmpeg -n -i "${src}" -ss "$start" -c copy "${dst}"
+    errno="$?"
+  fi
+  
+  return "$errno"
+}
+
+function isPositiveInt(){
+  # https://stackoverflow.com/a/3951175/6334421
+  case "$1" in
+    ''|*[!0-9]*) return 1 ;;
+    *) return 0 ;;
+  esac
+}
+
+function main(){
+  # TODO: check if ffmpeg installed
+
+  local source="$1"
+  local seconds="$2"
+  
+  # if args are empty -> cancel
+  if [ "$#" -ne 2 ] || [ -z "$1" ] || [ -z "$2" ] ; then
+    echo "Error: Expected two non-empty arguments!"
+    echo "usage: $0 <source> <seconds>"
+    exit 1
+  fi
+  
+  if ! isPositiveInt "$2" ; then
+    echo "2nd arg must be positive integer"
+    return 2
+  fi
+
+  split "$source" "${source}_a.mkv" "0" "$seconds" || exit "$?"
+  split "$source" "${source}_b.mkv" "$seconds"
+  exit "$?"
+}
+
+main "$@"
+

splitVideoGUI

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+#!/bin/bash
+
+#
+# Thanks to ...
+# the guys at puri.sm for their article about yad:
+# * [https://wp.puri.sm/posts/easy-librem-5-app-development-take-a-screenshot/]()
+#
+# as well as this website:
+# * http://smokey01.com/yad/
+# 
+
+
+function doStuff(){
+  # :param $1: user-input
+  
+  # Parse user input
+
+  SRC=`echo $1 | cut -d '|' -f1`
+  H=`echo $1 | cut -d '|' -f2`
+  M=`echo $1 | cut -d '|' -f3`
+  S=`echo $1 | cut -d '|' -f4`
+
+  # Print input to stdout
+
+  printf "SRC:\t%s\n" "$SRC"
+  printf "Time:\t%s:%s:%s\n" "$H" "$M" "$S"
+
+  # Calculate time in seconds
+  # H(ours) + M(inutes) + S(econds) -> S(econds)
+
+  HS="$(( 3600 * $H ))"
+  MS="$((   60 * $M ))"
+  S="$((  $HS + $MS + $S ))"
+
+  printf "Seconds: %s\n" "$S"
+  
+  # Split Video at specific time
+
+  splitVideo "$SRC" "$S"
+  errno="$?"
+  
+  # inform user of result
+  
+  case "$errno" in
+    "0")
+        TITLE="SUCCESS"
+        TEXT="Done! Check out the _a.mkv and _b.mkv files next to your input file."
+    ;;
+    *)
+        TITLE="ERROR"
+        TEXT="An error occured with code $errno."
+	;;
+  esac
+  echo "$TEXT" | yad --title="$TITLE" --wrap --text-info
+  
+  # return exitCode of splitVideo
+  return "$errno"
+}
+
+function main(){
+  # TODO check if yad installed
+
+  # Get user input via yad (GUI)
+
+  INPUT=`yad --title "splitVideo" --text="Split video at specific time" --form \
+    --field=video:SFL \
+    --field=hours:NUM \
+    --field=minutes:NUM \
+    --field=seconds:NUM \
+    "splitMeUp.mp4" "1" "15" "5" --focus-field=1`
+
+  case "$?" in
+    "0")
+        echo "User pressed 'OK'"
+        doStuff "$INPUT"
+        exit "$?"
+    ;;
+    "1")
+        echo "User pressed 'cancel'"
+        exit 0
+	;;
+	"252")
+	    echo "User closed window."
+	    exit 0
+	;;
+    *)
+        echo "An unexpected error has occurred: Code $?"
+        exit 1
+	;;
+  esac
+}
+
+main "$@"