Image and Video Editing

This repository contains commands for beginner level image and video editing in Ubuntu OS.

Tools Required

Install ImageMagick on Ubuntu 14.04

Open the terminal or press CTRL+ALT+T
Run following command sudo apt-get install imagemagick

Install FFmpeg on Ubuntu 14.04

Use PPA. Open the terminal or press CTRL+ALT+T

Run following commands-

sudo add-apt-repository ppa:mc3man/trusty-media
sudo apt-get update
sudo apt-get install ffmpeg gstreamer0.10-ffmpeg

Image Editing

Resizing

Resizing can be done in following ways-

Provide the height and width in pixel convert input.png -resize 800x600 output.png
The above command preserves the aspect ratio. If you want to force the image to become exactly specific size, add exclamation mark like this convert input.png -resize 800x600! output.png
By providing width only and keeping the aspect ratio preserve convert input.png -resize 800 output.png
By providing height only and keeping the aspect ratio preserve convert input.png -resize x600 output.png
By providing percentage such as convert input.png -resize 50% output.png

Crop Image

convert input.jpg -crop 640x620+0+0 output.jpg

Convert PNG to JPG

Convert PNG to JPG by specifing the compression level using following command

convert input.png -quality 95 output.jpg

Batch resize Images

mkdir resized-imgs
mogrify -resize 25.4% -quality 95 -path resized-imgs *.jpg
mogrify -resize 1024x768 -quality 95 -path resized-imgs *.jpg

Batch converting PNG to JPG

mogrify -format jpg *.png

Remove Image Metadata

mogrify -strip *.jpg

Convert HEIC image to JPG

for file in *.HEIC; do heif-convert $file ${file%.HEIC}.jpg; done

mogrify -format jpg *.HEIC

Add Text on Image

convert -font helvetica -fill white -pointsize 40 -gravity north \
    -draw "text 0,100 'TEXT TO BE DISPLAYED'" input.jpg output.jpg

convert -font helvetica -undercolor white -fill black -pointsize 40 \
    -gravity northwest -draw "text 0,0 'TEXT TO BE DISPLAYED'" input.jpg output.jpg

Increase Brightness on Image

mogrify -brightness-contrast 10  *.JPG

Video Editing

Crop

Command syntax ffmpeg -i input.mp4 -filter:v "crop=out_w:out_h:x:y" output.mp4. For example To crop a 80x60 section, starting from position (200, 100) use the following command:

ffmpeg -i input.mp4 -filter:v "crop=80:60:200:100" -c:a copy output.mp4

Preview

It is better to check the preview before cropping a video.

ffplay -i input.mp4 -vf "crop=80:60:200:100"

# Use following, if above command says "ffplay: command not found" 
ffmpeg.ffplay -i input.mp4 -vf "crop=80:60:200:100"

Cut

A part in between

ffmpeg -i input.mp4 -ss 00:00:03 -to 00:00:16 -c copy output.mp4

From beginning

ffmpeg -i input.mp4 -t 00:00:30 -c copy output.mp4

Reduce Size

By decreasing frame rate 30 frames/sec ffmpeg -i input.mp4 -r 30 output.mp4
By resizing video ffmpeg -i input.avi -vf scale=1024:-1 output.avi
By decreasing video bit rate use a bitrate of 64kb/sec ffmpeg -i input.mp4 -b:v 64k output.mp4

Convert MOV to MP4

ffmpeg -i input.mov -q:v 0 output.mp4
ffmpeg -i input.mov -vcodec h264 -acodec mp2 output.mp4

Remove Audio from Video

ffmpeg -i input.mp4 -c copy -an output.mp4

Add Text on Video

ffmpeg -i input.mp4 -vf "drawtext=:text='Stack Overflow':\
    fontcolor=white:fontsize=50:box=1:[email protected]:\
    boxborderw=5:x=(w-text_w)/2:y=(h-text_h)/2" -codec:a copy output.mp4

Place Two Videos Side-by-Side

ffmpeg -i left.mp4 -i right.mp4 -filter_complex hstack output.mp4

Concatenate Videos

$ 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

Gif from Video

Normal mode:
```
ffmpeg -i input.mp4 output.gif
```

Advance mode:

ffmpeg -y -i input.mp4 -vf palettegen palette.png
ffmpeg -y -i input.mp4 -i palette.png -filter_complex paletteuse \
    -r 10 -s 320x480 output.gif

PDF Editing

Convert PDF to JPEG

convert -density 600 input.pdf -quality 90 -background white -alpha remove output.jpg

Extract Pages from PDF

pdftk input.pdf cat 12-15 output outfile_p12-15.pdf

Join PDFs

pdftk file1.pdf file2.pdf cat output mergedfile.pdf

Remove password from PDF

pdftk input.pdf input_pw <yourpassword> output output.pdf

Miscellaneous

Reduce Gif Size

mogrify -layers 'optimize' -fuzz 7% file.gif

Create EPS from Latex

latex input.tex
dvips -o output.eps input.dvi

References

The above information is taken from various sources such as following-

ravijo / image-video-editing Goto Github PK

image-video-editing's Introduction