Displays track information for an MKV file. Requires FFprobe and jq.

streamSummary.sh

#!/usr/bin/env bash

# Function which does almost everything. It needs to be a function as it is recursively 
# called if the input is a directory.
main () {
	for i in "$@"; do

		# Check to see if input is valid
		checkInput "$i"
		
		# If input is not valid then skip to next iteration of for loop
		if [ "$?" -ne 0 ]; then
			continue
		fi

		# Print header
		printf '%*s\n' "${COLUMNS:-$(tput cols)}" '' | tr ' ' -
		printf '%s\n' "$i"
		printf '%*s\n' "${COLUMNS:-$(tput cols)}" '' | tr ' ' -

		# Generate and format information
		json=$(ffprobe -v error -show_entries stream -print_format json=compact=1 "$i")
		codex_type=$(echo "$json" | jq '(.streams[] | select(.codec_type=="video" or .codec_type=="audio" or .codec_type=="subtitle") | .codec_type) | @text' | sed 's/\"//g' | tr '\n' ' ')
		index=$(echo "$json" | jq '(.streams[] | select(.codec_type=="video" or .codec_type=="audio" or .codec_type=="subtitle") | .index) | @text' | sed 's/\"//g' | tr '\n' ' ')
		language=$(echo "$json" | jq '(.streams[] | select(.codec_type=="video" or .codec_type=="audio" or .codec_type=="subtitle") | .tags.language) | @text' | sed 's/\"//g' | tr '\n' ' ')
		codec_name=$(echo "$json" | jq '(.streams[] | select(.codec_type=="video" or .codec_type=="audio" or .codec_type=="subtitle") | if .codec_type=="audio" and .profile then .profile else .codec_name end) | @text' | sed 's/\"//g' | tr '\n' ',')
		channel_layout=$(echo "$json" | jq '(.streams[] | select(.codec_type=="video" or .codec_type=="audio" or .codec_type=="subtitle") | .channel_layout) | @text' | sed 's/\"//g' | sed 's/null/-/g' | tr '\n' ',')
		bitrate=$(echo "$json" | jq '.streams[].tags | to_entries | .[] | if .key|test("BPS*") then .value else empty end | @text' | sed 's/\"//g' | tr '\n' ' ')
		no_of_elements=$(echo "$json" | jq '.streams[].tags | to_entries | .[] | if .key|test("NUMBER_OF_FRAMES*") then .value else empty end | @text' | sed 's/\"//g' | tr '\n' ' ')
		default_flag=$(echo "$json" | jq '(.streams[] | select(.codec_type=="video" or .codec_type=="audio" or .codec_type=="subtitle") | .disposition.default) | @text' | sed 's/\"//g' | tr '\n' ' ')
		forced_flag=$(echo "$json" | jq '(.streams[] | select(.codec_type=="video" or .codec_type=="audio" or .codec_type=="subtitle") | .disposition.forced) | @text' | sed 's/\"//g' | tr '\n' ' ')
		track_title=$(echo "$json" | jq '(.streams[] | select(.codec_type=="video" or .codec_type=="audio" or .codec_type=="subtitle") | .tags.title) | @text' | sed 's/\"//g' | sed 's/null/-/g' | tr '\n' ',')
		
		# Store information in arrays
		read -ra codex_type_a <<< "$codex_type"
		read -ra index_a <<< "$index"
		read -ra language_a <<< "$language"
		IFS=',' read -ra codec_name_a <<< "$codec_name"
		IFS=',' read -ra channel_layout_a <<< "$channel_layout"
		read -ra bitrate_a <<< "$bitrate"
		read -ra no_of_elements_a <<< "$no_of_elements"
		read -ra default_flag_a <<< "$default_flag"
		read -ra forced_flag_a <<< "$forced_flag"
		IFS=',' read -ra track_title_a <<< "$track_title"
		
		# Print information
		table="TYPE,INDEX,LANGUAGE,CODEC,CHANNEL LAYOUT,BITRATE,NO OF ELEMENTS,DEFAULT,FORCED FLAG,TITLE \n"
		num_tracks=${#codex_type_a[@]}
		num_tracks_offset=$(($num_tracks-1))
		for i in $( eval echo {0.."$num_tracks_offset"} )
		do
			table+="${codex_type_a[$i]},${index_a[$i]},${language_a[$i]},${codec_name_a[$i]},${channel_layout_a[$i]},${bitrate_a[$i]},${no_of_elements_a[$i]},${default_flag_a[$i]},${forced_flag_a[$i]},${track_title_a[$i]} \n"
		done
		echo -e "$table" | column -t -s ','
		
		# Newline for formatting reasons
		echo ""
	done
}


# Function to check input validity. Returns 0 if valid, non-zero if not.
checkInput() {
	# Check if input is a directory
	# If it is look for mkv files in directory
	if [ -d "$1" ]; then
		for j in "$1"/*.mkv; do
			if [ ! -f "$j" ]; then
				echo "There are no mkv files in directory $1"
				return 1
			else
				main "$j"
			fi
		done
		continue
	fi

	# Check if input file exists
	if [ ! -f "$1" ]; then
		echo "Input file $1 does not exist."
		return 1
	fi
	
	# Check input file is an mkv file
	if [[ $1 != *.mkv ]]; then
		echo "Input file $1 is not an mkv file. This script only supports mkv files."
		return 1
	fi
	
	return 0
}

# Run main function
main "$@"