Fix preset detection

A preset file can contain more than one preset. As such, it's required
to specify the actual "PresetName" for the preset that needs to be used,
in addition to the actual *.json preset file.

README.md

@@ -2,6 +2,12 @@
 
 Use this rudimentary script to batch encode a folder of video files with HandbrakeCLI, using a custom preset.
 
+#### Prerequisites
+
+```
+sudo dnf install jq HandBrake HandBrake-gui
+```
+
 #### How to use
 
 1. Create a custom Handbrake preset.

encode.sh

@@ -2,7 +2,8 @@
 
 # Load an exported *.json Handbrake preset file
 PRESET='--preset-import-file'
-PRESETFILE='x265_10bit_crf23_slow_pt_audio_or_op192'
+PRESETFILE='x265_10bit_crf23_slow_pt_audio_or_op192.json'
+PRESETNAME=$(cat $PRESETFILE | jq '.PresetList[].PresetName' | cut -d'"' -f 2)
 
 # Set the source directory as the current directory
 SRC="."
@@ -23,5 +24,5 @@ EXT='mkv'
 IFS=$'\n'
 for INPUTFILE in `find . -type f -execdir basename {} ';'`; do
     OUTPUTFILE=${INPUTFILE%.*}
-    HandBrakeCLI "$PRESET" "$PRESETFILE" -i "$SRC"/"$INPUTFILE" -o "$DEST"/"$OUTPUTFILE""$OUTPUTSUFFIX"."$EXT"
+    HandBrakeCLI "$PRESET" "$PRESETFILE" -Z "$PRESETNAME" -i "$SRC"/"$INPUTFILE" -o "$DEST"/"$OUTPUTFILE""$OUTPUTSUFFIX"."$EXT"
 done