image_command.md

-- coding: utf-8 --

@Time : 2021/8/12 上午9:04

@Author : Luo Lu

@Email : argluolu@gmail.com

@File : images_command.py

@Software: PyCharm

batch convert grayscale to RGB color

mogrify -type TrueColor *.png mogrify -type TrueColor *.jpg

single convert grayscale to RGB color

mogrify -colorspace Gray yourpic.jpg

pngs to jpg

mogrify -format jpg filename.jpg

pngs to mp4

ffmpeg -r 1/7 -i c%dm04_1.png -c:v libx264 -vf fps=1 -pix_fmt yuv420p -vf pad="width=ceil(iw/2)*2:height=ceil(ih/2)*2" out.mp4

ffmpeg -framerate 25 -pattern_type glob -i "*.png" out.mp4

each image stays for N seconds, you can add the -r option followed by a value of 1/N.

ffmpeg -framerate 1/N -pattern_type glob -i "*.png" -r 25 out.mp4

Video split and restore

ffmpeg -framerate 30.00 -pattern_type glob -i '*.jpg' -c:v libx264 -r 30 -pix_fmt yuv420p jdd_video.mp4

ffmpeg -i video.mp4 -i audio.wav -c:v copy -c:a aac output.mp4

Extracting mp3 from mp4

ffmpeg -i input.mp4 -map 0:a output.mp3

Insert frame into video

ffmpeg -i need_process_video.mp4 -loop 1 -i insert_frame.png -filter_complex "[0][1]overlay=enable='if(gt(n,0),not(mod(n,20)),0)':shortest=1[v]" -map "[v]" -map 0:a -c:a copy out.mp4

convert avi to mp4

ffmpeg -i infile.avi youroutput.mp4

convert mp4 to gif

$ ffmpeg -i ppl-xpl_highlight.mp4 -vf "fps=30,split[s0][s1];[s0]palettegen[p];[s1][p]paletteuse" ppl-xpl_highlight.gif

speed mp4 to gif or mp4

ffmpeg -i Rec0001.mp4 -filter:v "setpts=0.15PTS" -r 30 lubs12.gif ffmpeg -i input.mp4 -filter:v "setpts=0.15PTS" -r 30 output.mp4

speed up gif

convert -delay 1x30 input.gif input-fast.gif

slow down gif

convert -delay 1x100 input.gif input-slow.gif

clip video

avconv -i *.mp4 -c:a copy -c:v copy -ss hh:mm:ss -t 00:0m:ss output.mp4 avconv -i Rec\ 0001.mp4 -c:a copy -c:v copy -ss 00:00:07 -t 00:01:34 c7001.mp4

rescale video

avconv -i input.mp4 -s 640x480 output.mp4

How to concatenate two MP4 files using FFmpeg?

$ cat mylist.txt file '/path/to/file1' file '/path/to/file2' file '/path/to/file3'

$ ffmpeg -f concat -safe 0 -i mylist.txt -c copy output.mp4

resize an animated GIF file using ImageMagick?

gifsicle input.gif --resize 50x50 > resized.gif

loop play mp4

mplayer -fs -loop 0 video.mp4

batch processing tif images--converting tif to jpg

mogrify -format jpg *.tif (have installed ImageMagic)

cd into the directory where your tif files are. then: for f in *.tif; do echo "Converting $f"; convert "$f" "$(basename "$f" .tif).jpg"; done

for f in *.tif do
echo "Converting $f" convert "$f" "$(basename "$f" .tif).jpg" done