Convert HEIC to JPG from the commandline
By default pictures taken from an iPhone are stored in HEIC format. I find that most of the systems I interact with do not support HEIC. Converting a large number of photos is tedious with the traditional GUI applications.
ImageMagick has the mogrify command line tool to quickly batch convert any number of files with a single command. ImageMagick is not installed by default. Use brew to install if necessary: brew install imagemagick.
Files copied with AirDrop off an iPhone:
jemurray@mbp-2019:~/Downloads $ ls -al IMG_0956.HEIC IMG_0957.HEIC IMG_0954.HEIC IMG_0953.HEIC IMG_0951.HEIC IMG_0950.HEIC IMG_0949.HEIC IMG_0948.HEIC IMG_0946.HEIC
-rw-r--r--@ 1 jemurray access_bpf 1526912 Sep 23 16:42 IMG_0946.HEIC
-rw-r--r--@ 1 jemurray access_bpf 2446142 Sep 23 16:43 IMG_0948.HEIC
-rw-r--r--@ 1 jemurray access_bpf 1351051 Sep 23 16:43 IMG_0949.HEIC
-rw-r--r--@ 1 jemurray access_bpf 1527961 Sep 23 16:43 IMG_0950.HEIC
-rw-r--r--@ 1 jemurray access_bpf 1433100 Sep 23 16:44 IMG_0951.HEIC
-rw-r--r--@ 1 jemurray access_bpf 2107683 Sep 23 16:45 IMG_0953.HEIC
-rw-r--r--@ 1 jemurray access_bpf 1804572 Sep 23 16:45 IMG_0954.HEIC
-rw-r--r--@ 1 jemurray access_bpf 1725539 Sep 23 16:47 IMG_0956.HEIC
-rw-r--r--@ 1 jemurray access_bpf 1642674 Sep 23 16:47 IMG_0957.HEIC
Use the mogrify command to convert the images from HEIC to JPG:
jemurray@mbp-2019:~/Downloads $ mogrify -format jpg IMG_0956.HEIC IMG_0957.HEIC IMG_0954.HEIC IMG_0953.HEIC IMG_0951.HEIC IMG_0950.HEIC IMG_0949.HEIC IMG_0948.HEIC IMG_0946.HEIC
When the conversion is complete, both the HEIC and JPG format images are available:
jemurray@mbp-2019:~/Downloads $ ls -alt
total 111213776
-rw-r--r--@ 1 jemurray staff 2469609 Sep 23 17:09 IMG_0946.jpg
drwx------@ 544 jemurray staff 17408 Sep 23 17:09 .
-rw-r--r--@ 1 jemurray staff 3373659 Sep 23 17:09 IMG_0948.jpg
-rw-r--r--@ 1 jemurray staff 2345537 Sep 23 17:09 IMG_0949.jpg
-rw-r--r--@ 1 jemurray staff 2743936 Sep 23 17:09 IMG_0950.jpg
-rw-r--r--@ 1 jemurray staff 2497650 Sep 23 17:09 IMG_0951.jpg
-rw-r--r--@ 1 jemurray staff 2844725 Sep 23 17:09 IMG_0953.jpg
-rw-r--r--@ 1 jemurray staff 2743487 Sep 23 17:09 IMG_0954.jpg
-rw-r--r--@ 1 jemurray staff 2694978 Sep 23 17:09 IMG_0957.jpg
-rw-r--r--@ 1 jemurray staff 2878063 Sep 23 17:09 IMG_0956.jpg
-rw-r--r--@ 1 jemurray access_bpf 1725539 Sep 23 16:47 IMG_0956.HEIC
-rw-r--r--@ 1 jemurray access_bpf 1642674 Sep 23 16:47 IMG_0957.HEIC
-rw-r--r--@ 1 jemurray access_bpf 1804572 Sep 23 16:45 IMG_0954.HEIC
-rw-r--r--@ 1 jemurray access_bpf 2107683 Sep 23 16:45 IMG_0953.HEIC
-rw-r--r--@ 1 jemurray access_bpf 1433100 Sep 23 16:44 IMG_0951.HEIC
-rw-r--r--@ 1 jemurray access_bpf 1527961 Sep 23 16:43 IMG_0950.HEIC
-rw-r--r--@ 1 jemurray access_bpf 1351051 Sep 23 16:43 IMG_0949.HEIC
-rw-r--r--@ 1 jemurray access_bpf 2446142 Sep 23 16:43 IMG_0948.HEIC
-rw-r--r--@ 1 jemurray access_bpf 1526912 Sep 23 16:42 IMG_0946.HEIC