FFmpeg functions

mediaconversion.bash

#!/usr/bin/env bash
# ========================================================================================
# Convert your media files into several formats, 
# add subtitles to your videos and more.
# ========================================================================================

wavtomp3() {
		# Convert wav files to mp3
		# Usage: wavtomp3 file.wav output.mp3
		
		filename=$1
		output=$2
		ffmpeg -i "$filename" -acodec mp3 "$output"
		
}		# ------- End of wavtomp3() -----------


webmtogif () {
		# Convert webm files to gif
		# Usage: webmtogif file.webm
		
		filename=$1
		tempfolder=$(mktemp -d)
		trap 'rm -vfr $tempfolder' EXIT

		# Check if extension is webm
		if [[ ${filename##*.} == 'webm' ]];
		then
				ffmpeg -y -i "$filename" -vf palettegen "$tempfolder/palette.png"
				ffmpeg -y -i "$filename" -i "$tempfolder/palette.png" \
					-filter_complex paletteuse -r 10 "$PWD/${filename/%webm/gif}" 
		else
				echo "the file must be a webm extension type."
		fi

}		# ------------------------- End of webmtogif() --------------------------

addsubtomp4() {
		# add subtitles to mp4
		# Usage: addsubtomp4 filename.mp4 subtitle.srt
		
		filename=$1
		subtitle=$2
		ffmpeg -i "$filename" -f srt -i "$subtitle" \
		-map 0:0 -map 0:1 -map 1:0 -c:v copy -c:a copy \
		-c:s mov_text "$PWD/${filename/%.mp4/-subtitled.mp4}"

}		# ------------ End of addsubtomp4() ---------------

addsubtomkv() {
		# Add subtitles to mkv
		# Usage: addsubtomkv filename.mkv subtitle.srt
		
		filename=$1
		subtitle=$2
		ffmpeg -i "$filename" -f srt -i "$subtitle" \
		-map 0:0 -map 0:1 -map 1:0 -c:v copy -c:a copy \
		-c:s srt  "$PWD/${filename/%.mkv/-subtitled.mkv}"

}		# ------------- End of addsubtomkv() --------------

cropvideo() {
		# Crop the gnome status bar from the full screen video
		# iw = input width, ih = input height
		# Usage: cropvideo filename
		
		filename="$1"
		extension="${filename##*.}"
		ffmpeg -i "$filename" -filter:v "crop=iw:ih-30:0:30" \
		"${filename/%.*/-cropped.$extension}"
		
}		# ------------- End of cropvideo() --------------