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Commands and notes on my use of ffmpeg (and ImageMagick, as it pertains)
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ffmpeg_notes.md

ffmpeg commands

Some of these DO NOT WORK and I'm not sure why they are here ugh

ffmpeg -r 15 -f image2 -s 500x500 -pattern_type glob -i '*.png' -vcodec libx264 -crf 17 -pix_fmt yuv420p 'combined.mp4'

ffmpeg -r 3 -f image2 -pattern_type glob -i '*.png' -vf "pad=ceil(iw/2)*2:ceil(ih/2)*2" -vcodec libx264 -crf 17 -pix_fmt yuv420p 'combined.mp4'

ffmpeg -r 3 -f image2 -pattern_type glob -i '*.png' -vf scale=-2:2048 -vcodec libx264 -crf 17 -pix_fmt yuv420p 'combined.mp4'

ffmpeg -r 3 -f image2 -pattern_type glob -i '*.png' -vf pad=4096:4096:0:40:black -vcodec libx264 -crf 17 -pix_fmt yuv420p 'combined.mp4'

ffmpeg -r 15 -f image2 -pattern_type glob -i '*.png' -vf pad="max(iw\,ih):ow:(ow-iw)/2:(oh-ih)/2" -vcodec libx264 -crf 17 -pix_fmt yuv420p 'combined.mp4'

ffmpeg -r 15 -f image2 -pattern_type glob -i '*.jpg' -vf pad=4096:4096:0:40:black -vcodec libx264 -crf 17 -pix_fmt yuv420p 'combined.mp4'

ffmpeg -r 15 -f image2 -pattern_type glob -i '*.jpg' -vf pad="ceil(max(iw\,ih)/2)*2:ow:(ow-iw)/2:(oh-ih)/2" -vcodec libx264 -crf 17 -pix_fmt yuv420p 'monas.mp4'

Center and pad (default blank) images that are < 1080x1080

ffmpeg -r 10 -f image2 -s 1080x1080 -pattern_type glob -i '*.jpg' -vf pad="ceil(max(iw\,ih)/2)*2:ow:(ow-iw)/2:(oh-ih)/2" -vcodec libx264 -crf 17 -pix_fmt yuv420p 'combined.mp4'

Just combine them

ffmpeg -r 3 -f image2 -pattern_type glob -i '*.jpg' -vf scale=720:-2 -vcodec libx264 -crf 17 -pix_fmt yuv420p 'putin.mp4'

[libx264 @ 0x7fe2fdd0dbc0] width not divisible by 2 (1571x1048)

UGH.

ffmpeg -i *.jpg -vf scale=720:-2 putin.mp4

ffmpeg -r 6 -f image2 -pattern_type glob -i '.jpg' -vf scale=720:-2 -vcodec libx264 -crf 17 -pix_fmt yuv420p 'putin.mp4' ffmpeg -r 6 -f image2 -pattern_type glob -i '.jpg' -vf "scale=720:-2:force_original_aspect_ratio=decrease,pad=720:720:-1:-1:color=black" -vcodec libx264 -crf 17 -pix_fmt yuv420p 'putin.mp4'

ffmpeg can only intake ONE FILE TYPE at a time

So, jpg or png, make your choice

rename "s/jpeg$/jpg/" *.jpeg

magick "*.png" -set filename: "out_%[t]" -auto-orient "%[filename:].jpg"

ffmpeg -f concat -safe 0 -i filelist.txt -c copy mergedVideo.mp4

https://stackoverflow.com/a/56002050/41153 https://video.stackexchange.com/questions/15468/non-monotonous-dts-on-concat-ffmpeg

sizes of multiple files

identify -ping -format "%f %w %h : %g\n" *.jpg  > image_info_file.txt

gif conversion

ffmpeg -i 20210627_135402.gif -q:v 1 -f mpegts squares_1.ts

ffmpeg -f concat -safe 0 -i filelist.txt -c copy mergedVideo.mp4

ffmpeg -i "concat:squares_1.ts|squares_2.ts|squares_3.ts|squares_4.ts" -pix_fmt rgb24 output.gif

ffmpeg -i output.gif -map 0 -c copy output.mp4

ffmpeg -i output.gif -c:v libx264 -c:a copy -pix_fmt yuv420p output.mp4

-pix_fmt yuv420p

ffmpeg -i "concat:output.mp4|output_2.mp4|output_3.mp4|output_4.mp4" -safe 0 -c copy output_merged.mp4

ffmpeg -f concat -safe 0 -i mergelist.txt -c copy output_merged.mp4

squares_source.gif - 628x626

ffmpeg -r 10 -f image2 -s 1080x1080 -pattern_type glob -i '2022_02_10_17_30_06_*.png' -vf pad="ceil(max(iw,ih)/2)*2:ow:(ow-iw)/2:(oh-ih)/2" -vcodec libx264 -crf 17 -pix_fmt yuv420p '2022_02_10_17_30_06.mp4'

ffmpeg -r 10 -f image2 -s 1504x1080 -pattern_type glob -i '*.png' -vcodec libx264 -crf 17 -pix_fmt yuv420p 'drone2.mp4'

ffmpeg -r 10 -f image2 -s 3337x2396 -pattern_type glob -i '*.jpg' -vf pad="ceil(max(iw,ih)/2)*2:ow:(ow-iw)/2:(oh-ih)/2" -vcodec libx264 -crf 17 -pix_fmt yuv420p 'drone2.mp4'

ffmpeg -r 5 -f image2 -s 3337x2396 -pattern_type glob -i '*.jpg' -vf pad="ceil(max(iw,ih)/2)*2:ow:(ow-iw)/2:(oh-ih)/2" -vcodec libx264 -crf 17 -pix_fmt yuv420p 'blue.mp4'

3337x2396 3391x2359

video mosaic

extract frames from mp4

ffmpeg -i 0001-0072.mp4 -vf fps=10 out%d.png

2022_02_10_17_30_06_00014

1920x1080 -> crop to -> 1504x1080 offset 208,0

convert out5.png -crop 1504x1080+208+0 cropped.png

convert *.png -crop 1504x1080+208+0 ./cropped/cropped_%2d.png

ffmpeg -i /Users/MPAULUKO/Movies/2022-02-11_22_36_55_952211/0001-0072.mp4 -vf fps=10 /Users/MPAULUKO/Movies/2022-02-12_17_10_45_175894/singles/moret%d.png

/Users/MPAULUKO/Movies/2022-02-11_22_36_55_952211/0001-0072.mp4

/Users/MPAULUKO/Movies/2022-02-12_17_10_45_175894

for f in "#moret*.png"; do mv -- "$f" "clean_$f"; done

extract frames from gif

convert -coalesce 2022_02_10_17_30_06.gif 2022_02_10_17_30_06/xx_%05d.png

convert 2022_02_10_17_30_06.gif -coalesce 2022_02_10_17_30_06/xx_%05d.png

convert 2022_02_10_17_30_06.gif -coalesce 2022_02_10_17_30_06_%05d.png

convert "2022_02_10_17_30_06.gif[1]" 2022_02_10_17_30_06/xx_%05d.png

magick identify -verbose 2022_02_10_17_30_06.gif

reprocessing for size

https://dev.to/benjaminblack/use-ffmpeg-to-compress-and-convert-videos-458l https://unix.stackexchange.com/questions/28803/how-can-i-reduce-a-videos-size-with-ffmpeg

ffmpeg -i source.mp4 -c:v libvpx-vp9 -b:v 0.33M -c:a libopus -b:a 96k -filter:v scale=960x540 target.webm

-vcodec libx265 -crf 28

/Users/MPAULUKO/Documents/monas.1776.mp4

ffmpeg -i /Users/MPAULUKO/Documents/monas.1776.mp4 -vcodec libx265 -crf 28 -filter:v scale=720x720 target.mp4

quicktime didn't like it, so

ffplay target.mp4

I Uploaded the video to Google Photos, which played it fine, and then to Instagram, which was also fine.

https://legacy.imagemagick.org/Usage/video/

resizing

https://www.smashingmagazine.com/2015/06/efficient-image-resizing-with-imagemagick/

mogrify -path OUTPUT_PATH -filter Triangle -define filter:support=2 -thumbnail OUTPUT_WIDTH -unsharp 0.25x0.25+8+0.065 -dither None -posterize 136 -quality 82 -define jpeg:fancy-upsampling=off -define png:compression-filter=5 -define png:compression-level=9 -define png:compression-strategy=1 -define png:exclude-chunk=all -interlace none -colorspace sRGB -strip INPUT_PATH

concatenate

$ cat mylist.txt
file /Users/michaelpaulukonis/projects/images/tell_him_nancy/hilbert/hilbert.5.720.mp4
file /Users/michaelpaulukonis/projects/images/tell_him_nancy/hilbert/hilbert.20.720.mp4
file /Users/michaelpaulukonis/projects/images/tell_him_nancy/hilbert/hilbert.30.720.mp4
file /Users/michaelpaulukonis/projects/images/tell_him_nancy/hilbert/hilbert.10.720.mp4
    
$ ffmpeg -f concat -safe 0 -i mylist.txt -c copy output.mp4

NOTE: all files must be "the same configuration" - size, fps, etc. So those slow framerates needs to me increased to 30

ffmpeg -i hilbert.20.720.mp4 -r 30 -y remade.20.720.mp4

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