Process Videos script

procvids.sh

#!/bin/bash

#
#		Process Vids 2.0
#
#	A script to process Snapchat story files and assemble them into 
#	one file for upload
#
#	(c) Matt Saunders, 2015
#

#Instructions: 
#	- Run SC-API, as many days in a row as you wish
#	- Copy downloaded stories to proc
#	- Run bash datesorter.sh to sort stories into their respective days
#	- Now run bash procvids.sh to build outputs
#	- Finally run bash renamer.sh to rename videos to appropriate name - [scusername]-[datecreated]

# 	VARIABLES
# Directory containing story files
STORY_DIR="/Users/matt/Documents/JACKTHEAUTORIPPER/testvids/proc"
# Variables to store resolutions for each video should be, determined by minimum resolution
VID_WIDTH=720
VID_HEIGHT=1280

#Iterate through subfolders containing date folders
for dir in /$STORY_DIR/* ; do
	echo ""
	echo "||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||"
	echo ""
	#Print current folder
	echo "$dir"
	echo ""

		#Iterate through subfolders containing stories
	for d in /$dir/* ; do
		echo ""
		echo "||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||"
		echo ""
		#Print current folder
		echo "$d"
		echo ""

		#Iterate through files in subfolder to find smallest video dimensions
		for f in $d/* ; do
			echo "____________________________________________________________"
			echo ""
			echo "$f"
			if [[ $f = *.mp4 ]]
				then
				#Use ffprobe to check file height and width
				eval $(ffprobe -v error -of flat=s=_ -select_streams v:0 -show_entries stream=height,width "$f")
				#Check that the correct dimension is being assigned - height should always be greater
				if [ ${streams_stream_0_width} -gt ${streams_stream_0_height} ]
					then 
					FILE_WIDTH=${streams_stream_0_height}
					FILE_HEIGHT=${streams_stream_0_width}
				else
					FILE_WIDTH=${streams_stream_0_width}
					FILE_HEIGHT=${streams_stream_0_height}
				fi
				echo "Width: $FILE_WIDTH   X   Height: $FILE_HEIGHT"
				#Store smallest height/width in VID_WIDTH/VID_HEIGHT
				if [ $FILE_WIDTH -lt $VID_WIDTH ] ;
					then VID_WIDTH=$FILE_WIDTH
				fi
				if [ $FILE_HEIGHT -lt $VID_HEIGHT ] ;
					then VID_HEIGHT=$FILE_HEIGHT
				fi
			fi
		done
		echo "____________________________________________________________"
		echo ""
		echo ""
		#After checking for minimum video size, print it
		echo "Video will be $VID_WIDTH  X  $VID_HEIGHT"
		echo ""

		#Begin processing files
		echo ""
		echo "------------------------------------------------------------"
		echo "------------------------PROCESSING--------------------------"
		echo ""
		#Iterate through files again
		for f in $d/* ; do
			#---Build videos in desired format from JPGs
			if [[ $f = *.jpg ]]
				then echo "Found a jpg!"
				MP4NAME="${f%.*}"
				MP4NAME="$MP4NAME.mp4"
				echo "$MP4NAME"
				#Copy original jpg to $d/orig
				mkdir -p /$d/orig
				cp "$f" /$d/orig
				#This needs to be the same dimensions as the previous videos in the folder, so it all can concat nicely
				ffmpeg -ar 48000 -ac 2 -f s16le -i /dev/zero -loop 1 -i "$f" -vf scale=$VID_WIDTH:$VID_HEIGHT -c:v libx264 -c:a libvo_aacenc -t 5 -r 24 -pix_fmt yuv420p $MP4NAME
				#Delete original
				rm "$f"
			fi
			#---Overlay .PNGs on appropriate videos
		done

		#After processing, concatenate all videos into one file, titled <CC>-Story-<DATE>.mp4
		echo ""
		echo "------------------------------------------------------------"
		echo "-----------------------CONCATENATING------------------------"
		echo ""
		#Vars to store commands
		argsInputs=()
		argsFilterText=()
		argsFilterTextAudio=() 
		count=0
		for f in $d/* ; do
			if [[ $f = *.mp4 ]]
				then
				echo $f
				argsInputs+=(-i "$f")
				#argsFilterText+=([$count:v] [$count:a:0])
				argsFilterText+=("[$count:v]scale=$VID_WIDTH:-2,pad=$VID_WIDTH:$VID_HEIGHT,setsar=sar=1/1[v$count];")
				argsFilterTextAudio+=([v$count] [$count:a:0])
				count=$((count + 1))
			fi
		done
		echo ""
		echo "Inputs:"
		echo ${argsInputs[@]}
		echo ""
		echo "Filter text 1"
		echo ${argsFilterText[@]}
		echo ""
		echo "Filter text 2"
		echo ${argsFilterTextAudio[@]}
		echo ""
		echo "Total files:"
		echo $count
		echo ""
		echo "Command:"
		echo ffmpeg ${argsInputs[@]} -filter_complex "${argsFilterText[@]} ${argsFilterTextAudio[@]} concat=n=$count:v=1:a=1 [v] [a]" -map "[v]" -map "[a]" /$d/output.mp4
		echo ""
		ffmpeg ${argsInputs[@]} -filter_complex "${argsFilterText[@]} ${argsFilterTextAudio[@]} concat=n=$count:v=1:a=1 [v] [a]" -map "[v]" -map "[a]" /$d/output.mp4
	done

done