sulram · April 15, 2025 00:03 · Jul 4, 2020 · Jul 4, 2020 · Dec 19, 2017 · Dec 11, 2014
diff --git a/imagemagick-ffmpeg-commands.md b/imagemagick-ffmpeg-commands.md
@@ -14,6 +14,7 @@ Remember that the order of parameters/options is very important.
 ##### resize and crop
 
     convert *.jpg -resize "460x460^" -gravity center -crop 460x460+0+0 +repage crop.jpg
+    mogrify -path ../voxels3 -format png -resize "512x512^" -gravity center -crop 512x512+0+0 +repage *.png
 
 ##### resize to fit with background
 

diff --git a/imagemagick-ffmpeg-commands.md b/imagemagick-ffmpeg-commands.md
@@ -65,4 +65,12 @@ thanks to <http://blog.room208.org/post/48793543478>
 ##### prores
 
     ffmpeg -i aya-mpeg4.mov -c:v prores -profile:v 2 aya-prores.mov
-    ffmpeg -i aya-mpeg4.mov -vcodec prores_ks -pix_fmt yuva444p10le -alpha_bits 16 -profile:v 4444 -f mov aya-prores-alpha.mov
+    ffmpeg -i aya-mpeg4.mov -vcodec prores_ks -pix_fmt yuva444p10le -alpha_bits 16 -profile:v 4444 -f mov aya-prores-alpha.mov
+
+##### stretch video
+
+    ffmpeg -i input.mp4 -filter_complex "setpts=PTS/10" output.mp4
+
+##### video from png
+
+    ffmpeg -r 8 -i stylegan-%06d.png -c:v libx264 -vf fps=30 -pix_fmt yuv420p latent-space-walker.mp4
diff --git a/imagemagick-ffmpeg-commands.md b/imagemagick-ffmpeg-commands.md
@@ -62,3 +62,7 @@ thanks to <http://blog.room208.org/post/48793543478>
     convert ani.gif -coalesce ani.png
     ffmpeg -f image2 -i ani-%d.png ani.mpg -vb 20M
 
+##### prores
+
+    ffmpeg -i aya-mpeg4.mov -c:v prores -profile:v 2 aya-prores.mov
+    ffmpeg -i aya-mpeg4.mov -vcodec prores_ks -pix_fmt yuva444p10le -alpha_bits 16 -profile:v 4444 -f mov aya-prores-alpha.mov
diff --git a/imagemagick-ffmpeg-commands.md b/imagemagick-ffmpeg-commands.md
@@ -2,7 +2,7 @@
 
 Remember that the order of parameters/options is very important.
 
-##### convert to another dir
+##### convert images and save to another dir
 
     convert *.png -set filename:original %t 'export/%[filename:original].jpg'
 

diff --git a/images to pdf.md b/images to pdf.md
@@ -1,6 +1,7 @@
+### How-to: Convert JPG to PDF using ImageMagick
+
 <http://catlingmindswipe.blogspot.com.br/2013/11/how-to-convert-jpg-to-pdf-using.html>
 
-How-to: Convert JPG to PDF using ImageMagick
 It's a common enough task, trying to convert multiple jpg files into one pdf, particularly when I don't need these to be converted with such high quality, I just want the black and white text readable.
 
 I can scan, crop, and monochrome in a graphics program but compiling them into a single PDF booklet was always tricky. Which is how I started using ImageMagick.

diff --git a/commands.md → imagemagick-ffmpeg-commands.md b/commands.md → imagemagick-ffmpeg-commands.md
diff --git a/commands.md b/commands.md
@@ -2,6 +2,10 @@
 
 Remember that the order of parameters/options is very important.
 
+##### convert to another dir
+
+    convert *.png -set filename:original %t 'export/%[filename:original].jpg'
+
 ##### resize, change dpi and quality
 
     convert *.jpg -resize 1600 -quality 70% -depth 72 -units pixelsperinch resized.jpg

diff --git a/images to pdf.md b/images to pdf.md
@@ -0,0 +1,44 @@
+<http://catlingmindswipe.blogspot.com.br/2013/11/how-to-convert-jpg-to-pdf-using.html>
+
+How-to: Convert JPG to PDF using ImageMagick
+It's a common enough task, trying to convert multiple jpg files into one pdf, particularly when I don't need these to be converted with such high quality, I just want the black and white text readable.
+
+I can scan, crop, and monochrome in a graphics program but compiling them into a single PDF booklet was always tricky. Which is how I started using ImageMagick.
+
+ImageMagick is a command line conversion program that is capable of so many more batch operations than this - resizing, compression, format conversion - and it's available on all platforms - Linux, Windows and Mac.
+
+Bear in mind that creating a PDF document from multiple JPEG images can take some time and you may want to trial different settings for size and quality of output, so I suggest you make a copy of the JPEG files in a temporary folder to play around with and use Imagemagick on those, NOT your originals. Reducing the resolution as a first step will also make things much quicker.
+
+Originally I was just using the basic
+
+    convert *.jpg output.pdf and/or convert *.jpg -adjoin output.pdf
+
+which works most of the time, however there's a bug in the convert routine which can in some versions give a segmentation fault when converting a number of JPEG files to one PDF file. 
+
+What this command does is take all the .jpg's (or format of your choice) in a folder and convert them to a single PDF - you can name it whatever you like.
+
+You can avoid the segmentation fault bug and do the compression at the same time if you use
+
+    convert *.JPG -compress Zip output.pdf
+
+but the zip compression appears quite inefficient and results in huge file sizes. 
+
+You could resize and lower the quality of the images using;
+
+    mogrify -resize 50% -quality 25
+
+Which overwrites the originals. You can combine resizing and conversion using 
+
+    convert -quality 25 -resize 50% *.jpg -adjoin output.pdf
+
+which works, but takes longer as you're combining batch operations. 
+
+And yes, you can resizing images without overwriting the originals by specifying a new file name; 
+
+    convert '*.JPG' -resize 640x480 newfile%03d.jpg
+
+which outputs the converted images as newfile001.jpg, newfile002.jpg, and so on. Alternatively, if you want to retain the original file name and prepend new, you could use a bit more code:
+
+    for file in *.JPG ; do convert "$file" -resize 640x480  "new-${file}" ; done
+
+This is just a sample of what Imagemagick can do if you are prepared to experiment at the command line. RC
diff --git a/commands.md b/commands.md
@@ -1,4 +1,4 @@
-### ImageMagick commands
+### ImageMagick and FFMPEG commands
 
 Remember that the order of parameters/options is very important.
 

diff --git a/commands.md b/commands.md
@@ -11,7 +11,7 @@ Remember that the order of parameters/options is very important.
 
     convert *.jpg -resize "460x460^" -gravity center -crop 460x460+0+0 +repage crop.jpg
 
-#### resize to fit with background
+##### resize to fit with background
 
     convert *.png -background black -resize 1024x768 -gravity center -extent 1024x768 fit.png
 

diff --git a/commands.md b/commands.md
@@ -1,5 +1,7 @@
 ### ImageMagick commands
 
+Remember that the order of parameters/options is very important.
+
 ##### resize, change dpi and quality
 
     convert *.jpg -resize 1600 -quality 70% -depth 72 -units pixelsperinch resized.jpg
@@ -9,6 +11,10 @@
 
     convert *.jpg -resize "460x460^" -gravity center -crop 460x460+0+0 +repage crop.jpg
 
+#### resize to fit with background
+
+    convert *.png -background black -resize 1024x768 -gravity center -extent 1024x768 fit.png
+
 ##### mosaic with cropped images
 
     montage crop*.jpg -geometry 460x460+0+0 mosaic.jpg

diff --git a/commands.md b/commands.md
@@ -3,6 +3,7 @@
 ##### resize, change dpi and quality
 
     convert *.jpg -resize 1600 -quality 70% -depth 72 -units pixelsperinch resized.jpg
+    convert *.jpg -set filename:original %t -resize 1600 -quality 70% -depth 72 -units pixelsperinch 'resized_%[filename:original].jpg'
 
 ##### resize and crop
 

diff --git a/ffmpeg.md → commands.md b/ffmpeg.md → commands.md
@@ -1,3 +1,27 @@
+### ImageMagick commands
+
+##### resize, change dpi and quality
+
+    convert *.jpg -resize 1600 -quality 70% -depth 72 -units pixelsperinch resized.jpg
+
+##### resize and crop
+
+    convert *.jpg -resize "460x460^" -gravity center -crop 460x460+0+0 +repage crop.jpg
+
+##### mosaic with cropped images
+
+    montage crop*.jpg -geometry 460x460+0+0 mosaic.jpg
+
+
+##### scale and stack images
+
+    convert *.png -append -scale 50% stacked.png
+
+
+##### animated gif from png files
+
+    convert -delay 5 -loop 0 *.png ../animation.gif
+
 ##### from mov to gif (with ffmpeg)
 
 thanks to <http://blog.room208.org/post/48793543478>
@@ -26,4 +50,4 @@ thanks to <http://blog.room208.org/post/48793543478>
 
     convert ani.gif -coalesce ani.png
     ffmpeg -f image2 -i ani-%d.png ani.mpg -vb 20M
-
+
diff --git a/imagemagick.md b/imagemagick.md
@@ -1,25 +0,0 @@
-### ImageMagick + FFMPEG commands
-
-##### resize, change dpi and quality
-
-    convert *.jpg -resize 1600 -quality 70% -depth 72 -units pixelsperinch resized.jpg
-
-##### resize and crop
-
-    convert *.jpg -resize "460x460^" -gravity center -crop 460x460+0+0 +repage crop.jpg
-
-##### mosaic with cropped images
-
-    montage crop*.jpg -geometry 460x460+0+0 mosaic.jpg
-
-
-##### scale and stack images
-
-    convert *.png -append -scale 50% stacked.png
-
-
-##### animated gif from png files
-
-    convert -delay 5 -loop 0 *.png ../animation.gif
-
-

diff --git a/imagemagick-ffmpeg.md → ffmpeg.md b/imagemagick-ffmpeg.md → ffmpeg.md
@@ -1,28 +1,3 @@
-### ImageMagick + FFMPEG commands
-
-##### resize, change dpi and quality
-
-    convert *.jpg -resize 1600 -quality 70% -depth 72 -units pixelsperinch resized.jpg
-
-##### resize and crop
-
-    convert *.jpg -resize "460x460^" -gravity center -crop 460x460+0+0 +repage crop.jpg
-
-##### mosaic with cropped images
-
-    montage crop*.jpg -geometry 460x460+0+0 mosaic.jpg
-
-
-##### scale and stack images
-
-    convert *.png -append -scale 50% stacked.png
-
-
-##### animated gif from png files
-
-    convert -delay 5 -loop 0 *.png ../animation.gif
-
-
 ##### from mov to gif (with ffmpeg)
 
 thanks to <http://blog.room208.org/post/48793543478>

diff --git a/imagemagick.md b/imagemagick.md
@@ -0,0 +1,25 @@
+### ImageMagick + FFMPEG commands
+
+##### resize, change dpi and quality
+
+    convert *.jpg -resize 1600 -quality 70% -depth 72 -units pixelsperinch resized.jpg
+
+##### resize and crop
+
+    convert *.jpg -resize "460x460^" -gravity center -crop 460x460+0+0 +repage crop.jpg
+
+##### mosaic with cropped images
+
+    montage crop*.jpg -geometry 460x460+0+0 mosaic.jpg
+
+
+##### scale and stack images
+
+    convert *.png -append -scale 50% stacked.png
+
+
+##### animated gif from png files
+
+    convert -delay 5 -loop 0 *.png ../animation.gif
+
+
diff --git a/png2jpg.sh b/png2jpg.sh
@@ -0,0 +1,4 @@
+for img in *.png; do
+    filename=${img%.*}
+    convert "$filename.png" "$filename.jpg"
+done
diff --git a/imagemagick-ffmpeg.md b/imagemagick-ffmpeg.md
@@ -1,33 +1,33 @@
-# ImageMagick + FFMPEG commands
+### ImageMagick + FFMPEG commands
 
-### resize, change dpi and quality
+##### resize, change dpi and quality
 
     convert *.jpg -resize 1600 -quality 70% -depth 72 -units pixelsperinch resized.jpg
 
-### resize and crop
+##### resize and crop
 
     convert *.jpg -resize "460x460^" -gravity center -crop 460x460+0+0 +repage crop.jpg
 
-### mosaic with cropped images
+##### mosaic with cropped images
 
     montage crop*.jpg -geometry 460x460+0+0 mosaic.jpg
 
 
-### scale and stack images
+##### scale and stack images
 
     convert *.png -append -scale 50% stacked.png
 
 
-### animated gif from png files
+##### animated gif from png files
 
     convert -delay 5 -loop 0 *.png ../animation.gif
 
 
-### from mov to gif (with ffmpeg)
+##### from mov to gif (with ffmpeg)
 
 thanks to <http://blog.room208.org/post/48793543478>
 
-#### 1. convert video to PNG sequence with FFMPEG
+###### 1. convert video to PNG sequence with FFMPEG
 
     ffmpeg -i video.mov -r 10 -s 640x400 -f image2 frames/frame-%03d.png
 
@@ -37,7 +37,7 @@ thanks to <http://blog.room208.org/post/48793543478>
 * `-f image2` the output format, a series of still images
 * `frames/frame-%03d.png` is a printf format string specifying the output filenames, in this case `dir/name-###.png`, a series of PNG images called 001.png, 002.png, 003.png, and so on.
 
-#### 2. convert PNG sequence to animated GIF
+###### 2. convert PNG sequence to animated GIF
 
     convert frames/*.png -delay 1x8 -coalesce -layers OptimizeTransparency animation.gif
 
@@ -47,7 +47,7 @@ thanks to <http://blog.room208.org/post/48793543478>
 * `-layers OptimizeTransparency` tells ImageMagick to replace portions of each frame that are identical to the corresponding parts of the preceding frame with transparency, saving on file size.
 * `animation.gif` output file
 
-### convert gif to images and video
+##### convert gif to images and video
 
     convert ani.gif -coalesce ani.png
     ffmpeg -f image2 -i ani-%d.png ani.mpg -vb 20M

diff --git a/imagemagick-ffmpeg.md b/imagemagick-ffmpeg.md
@@ -1,5 +1,9 @@
 # ImageMagick + FFMPEG commands
 
+### resize, change dpi and quality
+
+    convert *.jpg -resize 1600 -quality 70% -depth 72 -units pixelsperinch resized.jpg
+
 ### resize and crop
 
     convert *.jpg -resize "460x460^" -gravity center -crop 460x460+0+0 +repage crop.jpg

diff --git a/imagemagick-ffmpeg.md b/imagemagick-ffmpeg.md
@@ -1,5 +1,14 @@
 # ImageMagick + FFMPEG commands
 
+### resize and crop
+
+    convert *.jpg -resize "460x460^" -gravity center -crop 460x460+0+0 +repage crop.jpg
+
+### mosaic with cropped images
+
+    montage crop*.jpg -geometry 460x460+0+0 mosaic.jpg
+
+
 ### scale and stack images
 
     convert *.png -append -scale 50% stacked.png

diff --git a/imagemagick-ffmpeg.md b/imagemagick-ffmpeg.md
@@ -32,4 +32,10 @@ thanks to <http://blog.room208.org/post/48793543478>
 * `-delay 1x8` says that the animation should play a frame every 1/8 of a second. I computed this number by looking at the frame rate of the original video (24) and dividing by the number of frames each drawing plays for (3). Note that most browsers slow down animations that play faster than 20 frames per second, or 1/50 second per frame. Most videos play back at between 25 and 30 fps, so you may have to drop every other frame or so if you care about accuracy of playback speed.
 * `-coalesce` apparently “fully define[s] the look of each frame of an [sic] GIF animation sequence, to form a ‘film strip’ animation,” according to the documentation.
 * `-layers OptimizeTransparency` tells ImageMagick to replace portions of each frame that are identical to the corresponding parts of the preceding frame with transparency, saving on file size.
-* `animation.gif` output file
+* `animation.gif` output file
+
+### convert gif to images and video
+
+    convert ani.gif -coalesce ani.png
+    ffmpeg -f image2 -i ani-%d.png ani.mpg -vb 20M
+
diff --git a/imagemagick-ffmpeg.md b/imagemagick-ffmpeg.md
@@ -1,3 +1,5 @@
+# ImageMagick + FFMPEG commands
+
 ### scale and stack images
 
     convert *.png -append -scale 50% stacked.png

diff --git a/imagemagick-ffmpeg.md b/imagemagick-ffmpeg.md
@@ -11,7 +11,9 @@
 ### from mov to gif (with ffmpeg)
 
 thanks to <http://blog.room208.org/post/48793543478>
-
+
+#### 1. convert video to PNG sequence with FFMPEG
+
     ffmpeg -i video.mov -r 10 -s 640x400 -f image2 frames/frame-%03d.png
 
 * `-i video.mov` the video file
@@ -20,4 +22,12 @@ thanks to <http://blog.room208.org/post/48793543478>
 * `-f image2` the output format, a series of still images
 * `frames/frame-%03d.png` is a printf format string specifying the output filenames, in this case `dir/name-###.png`, a series of PNG images called 001.png, 002.png, 003.png, and so on.
 
+#### 2. convert PNG sequence to animated GIF
 
+    convert frames/*.png -delay 1x8 -coalesce -layers OptimizeTransparency animation.gif
+
+* `frames/*.png` input files
+* `-delay 1x8` says that the animation should play a frame every 1/8 of a second. I computed this number by looking at the frame rate of the original video (24) and dividing by the number of frames each drawing plays for (3). Note that most browsers slow down animations that play faster than 20 frames per second, or 1/50 second per frame. Most videos play back at between 25 and 30 fps, so you may have to drop every other frame or so if you care about accuracy of playback speed.
+* `-coalesce` apparently “fully define[s] the look of each frame of an [sic] GIF animation sequence, to form a ‘film strip’ animation,” according to the documentation.
+* `-layers OptimizeTransparency` tells ImageMagick to replace portions of each frame that are identical to the corresponding parts of the preceding frame with transparency, saving on file size.
+* `animation.gif` output file
diff --git a/imagemagick-ffmpeg.md b/imagemagick-ffmpeg.md
@@ -9,17 +9,15 @@
 
 
 ### from mov to gif (with ffmpeg)
-
 
-The order of command line arguments matters. This command line should work but will generate a giant file:
-
-    ffmpeg -i yesbuddy.mov -pix_fmt rgb24 output.gif
-
-Note that you probably want to reduce the frame rate and size when you convert, as well as specify a start time and duration. You probably do not want to convert the entire file at its original resolution and frame rate.
-
-    ffmpeg -ss 00:00:00.000 -i yesbuddy.mov -pix_fmt rgb24 -r 10 -s 320x240 -t 00:00:10.000 output.gif
-
-The file size will still be huge. You may be able to use ImageMagick's GIF optimizer to reduce the size:
+thanks to <http://blog.room208.org/post/48793543478>
+    
+    ffmpeg -i video.mov -r 10 -s 640x400 -f image2 frames/frame-%03d.png
+    
+* `-i video.mov` the video file
+* `-r 10` the rate
+* `-s 640x400` the output size
+* `-f image2` the output format, a series of still images
+* `frames/frame-%03d.png` is a printf format string specifying the output filenames, in this case `dir/name-###.png`, a series of PNG images called 001.png, 002.png, 003.png, and so on.
 
-    convert -layers Optimize output.gif output_optimized.gif
 
diff --git a/imagemagick-ffmpeg.md b/imagemagick-ffmpeg.md
@@ -0,0 +1,25 @@
+### scale and stack images
+
+    convert *.png -append -scale 50% stacked.png
+
+
+### animated gif from png files
+
+    convert -delay 5 -loop 0 *.png ../animation.gif
+
+
+### from mov to gif (with ffmpeg)
+
+
+The order of command line arguments matters. This command line should work but will generate a giant file:
+
+    ffmpeg -i yesbuddy.mov -pix_fmt rgb24 output.gif
+
+Note that you probably want to reduce the frame rate and size when you convert, as well as specify a start time and duration. You probably do not want to convert the entire file at its original resolution and frame rate.
+
+    ffmpeg -ss 00:00:00.000 -i yesbuddy.mov -pix_fmt rgb24 -r 10 -s 320x240 -t 00:00:10.000 output.gif
+
+The file size will still be huge. You may be able to use ImageMagick's GIF optimizer to reduce the size:
+
+    convert -layers Optimize output.gif output_optimized.gif
+
diff --git a/imagemagick.md b/imagemagick.md
@@ -1,10 +0,0 @@
-# ImageMagick commands
-
-### animated gif from png files
-
-    convert -delay 5 -loop 0 *.png ../animation.gif
-
-
-### scale and stack images
-
-    convert *.png -append -scale 50% stacked.png

diff --git a/imagemagick.md b/imagemagick.md
@@ -0,0 +1,10 @@
+# ImageMagick commands
+
+### animated gif from png files
+
+    convert -delay 5 -loop 0 *.png ../animation.gif
+
+
+### scale and stack images
+
+    convert *.png -append -scale 50% stacked.png