mrhampson · July 11, 2025 18:02 · cwqt · Apr 9, 2021 · git-antonyuk · Dec 20, 2023
diff --git a/convertMovToMp4.sh b/convertMovToMp4.sh
 #!/bin/bash

 usage="$(basename "$0") [-h] [-i] -- program that uses ffmpeg to convert mac screencapture .mov to a compressed mp4 for sharing

 where:
    -h  show this help text
    -i  (required) the mov file to convert to mp4

 dependencies: 
    Requires ffmpeg to be installed and available in the user's PATH.
    You may install it on mac using brew install ffmpeg"

 while getopts 'hi:' option; do
  case "$option" in
    h) echo "$usage"
       exit
       ;;
    i) inFile=$OPTARG
       ;;
    :) printf "missing argument for -%s\n" "$OPTARG" >&2
       echo "$usage" >&2
       exit 1
       ;;
    *) echo "Unimplemented option: -$OPTARG" >&2;
       exit 1
       ;;
  esac
 done
 shift $((OPTIND - 1))

 if [ -z "$inFile" ]
 then
  echo "Please specify an input file with -i"
  exit 1
 fi

 filename=$(basename "$inFile")
 extension="${filename##*.}"
 filename="${filename%.*}"

 if [ "$extension" != "mov" ]
 then
  echo "Input must be an mov file"
  exit 1
 fi

 # Explanation of the settings
 # movflags          – This option optimizes the structure of the MP4 file so the browser can load it as quickly as possible.
 # pix_fmt           – MP4 videos store pixels in different formats. We include this option to specify a specific format 
 #                     which has maximum compatibility across all browsers.
 # tune stillimage   - optimizes for when most frames are a still image like screenshots
 # crf 30            - A high constant rate factor to compress more but sacrifice some quality since this is just a screenshot
 # vf scale=...      - Ensure that the video height and width are divisible by 2, otherwise some players won't play it
 # an                - make sure there's no audio stream included

 ffmpeg -i "$inFile" -movflags faststart -pix_fmt yuv420p -tune stillimage -crf 30 -vf 'scale=trunc(iw/2)*2:trunc(ih/2)*2' -vcodec h264 -an "$filename".mp4
	#!/bin/bash

	usage="$(basename "$0") [-h] [-i] -- program that uses ffmpeg to convert mac screencapture .mov to a compressed mp4 for sharing

	where:
	-h show this help text
	-i (required) the mov file to convert to mp4

	dependencies:
	Requires ffmpeg to be installed and available in the user's PATH.
	You may install it on mac using brew install ffmpeg"

	while getopts 'hi:' option; do
	case "$option" in
	h) echo "$usage"
	exit
	;;
	i) inFile=$OPTARG
	;;
	:) printf "missing argument for -%s\n" "$OPTARG" >&2
	echo "$usage" >&2
	exit 1
	;;
	*) echo "Unimplemented option: -$OPTARG" >&2;
	exit 1
	;;
	esac
	done
	shift $((OPTIND - 1))

	if [ -z "$inFile" ]
	then
	echo "Please specify an input file with -i"
	exit 1
	fi

	filename=$(basename "$inFile")
	extension="${filename##*.}"
	filename="${filename%.*}"

	if [ "$extension" != "mov" ]
	then
	echo "Input must be an mov file"
	exit 1
	fi

	# Explanation of the settings
	# movflags – This option optimizes the structure of the MP4 file so the browser can load it as quickly as possible.
	# pix_fmt – MP4 videos store pixels in different formats. We include this option to specify a specific format
	# which has maximum compatibility across all browsers.
	# tune stillimage - optimizes for when most frames are a still image like screenshots
	# crf 30 - A high constant rate factor to compress more but sacrifice some quality since this is just a screenshot
	# vf scale=... - Ensure that the video height and width are divisible by 2, otherwise some players won't play it
	# an - make sure there's no audio stream included

	ffmpeg -i "$inFile" -movflags faststart -pix_fmt yuv420p -tune stillimage -crf 30 -vf 'scale=trunc(iw/2)2:trunc(ih/2)2' -vcodec h264 -an "$filename".mp4
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