PNG (portable network graphics) is a popular image format that supports 32-bit colors and transparency.

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6
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4answers
3k views

How to open huge PNG image [duplicate]

I have a really big PNG image, it's ~11GB. Is there any way to open it? I would just like to view it without too many problems. I tried Photoshop CS6 and it's too big even for this kind of modern ...
4
votes
4answers
5k views

How to change DPI of a PNG file? (in command line, without ImageMagick)

I am looking for a way to change the DPI on PNG image files. Using ImageMagick this is easy: $ convert -density 150 -units pixelsperinch file.png file.png The problem is that I will run this ...
6
votes
1answer
12k views

Using ffmpeg to make a movie from png files

I have 277 800x600 png files with filenames with the format island_sizes-CSH(II)-###.png where ### is a number starting with 084 and ending at 360. I'm doing ffmpeg -i island_sizes-CSH\(II\)-*.png ...
1
vote
2answers
589 views

How does this animated png work?

I've just received an email that contains a remotely hosted animated png. The png file is a countdown timer. Here is the URL:- https://img.kickdyn.com/57/1MfiOGVFjvmaMMHd3VZv/imgancnt.png Can ...
0
votes
1answer
176 views

Turn monotone background in transparent

On the internet, you usually get images, that originally were PNGs with aplha chanel and were pasted on white background. Is there some way to substract the white from the zones, where the ...
0
votes
4answers
346 views

Convert single PNG image into single PDF

I need a method to convert single images (specifically PNG format) into PDF's that are automatically re-sized to fit that single image (and not remain the default 8.5x11" letter size). I could do this ...
2
votes
2answers
465 views

Why do light edges appear on transparent PNGs online?

Everytime I try to use transparent PNG images on sites, white edges keep appearing around the images, seen in the photo below. How come this is happening, and how do I stop this from happening? ...
0
votes
3answers
1k views

Transparent texture rendered as black

I'm trying to render a scene with transparent png. The scene is actually imported from a .obj file (with another .mtl file), which should technically applies the transparency for me. ^ It does ...
0
votes
2answers
5k views

Mac get info always showing png icon instead of the icon

When I open 'Get Info' copy my icon over the default and it applies it but it never shows it. It only shows the default PNG icon (with the pictures and the camera). Does anybody faced the problem ...
1
vote
1answer
5k views

Why is R having trouble rendering plots to a PNG file?

I am trying to get R to do some very basic plotting and such in UNIX, but am getting a weirdo error relating to X11, when as far as I can tell I'm not even needing X11. I have a matrix name d and ...
6
votes
3answers
4k views

ImageMagick Convert: How to produce sharp resized PNG files from SVG files?

I am using this command to generate a sharp 512px wide version of an SVG file that I have: convert -geometry 256 pinterest.svg pinterest.png This is the source file: <?xml version="1.0" ...
2
votes
2answers
4k views

Converting RGB images into lossless video with avconv / ffmpeg

I am trying to convert a series of PNG24 images containing a screen animation to a lossless video, so that every pixel is reproduced exactly as it was in the original. But avconv (and ffmpeg) both ...
0
votes
1answer
228 views

Batch image replace 2 colors

I know there is already such question but it didn't helped me. I have a lot of image files, where I want to change purple RGB(255, 0, 255) to transparent (it is png). Is there any app which could do ...
4
votes
1answer
3k views

How do I merge a folder of PNG images to a mp4 movie using avconv?

I have a folder containing many time stamped PNG images which I'd like to merge to a short movie. The contents of that directory looks like this: └── images ├── img_20130421_115547.png ├── ...
593
votes
5answers
80k views

Why does this PNG image display differently in Chrome & Firefox than in Safari and IE?

Check this image out: On Chrome and Firefox it will show as a pear. Now, try to save it and look at it saved on your desktop. Also, try viewing in Safari or Internet Explorer. It will display ...
0
votes
2answers
2k views

PNG file size is too big after converting from JPG

I try to convert a JPG file to PNG, but the size is still too big, about 7 MB. What's wrong? I used Microsoft Paint to convert it. The original file is only 500 KB in JPEG, yet the PNG file is 7 MB. ...
10
votes
3answers
10k views

How to convert GIF files to PNG or JPEG in OS X with command line?

I have 10k+ GIF files that I need to convert to PNG or JPEG preferably using command line so that I can automate it. I'm not worried about losing quality or transparency, just need to prepare files ...
5
votes
2answers
1k views

Create a .png with zopfli

I wanted to give zopfli a try since I have some static .png's that I am using on a website. I see how I can create .gz and .deflate-files. But how can I create a png that can be displayed in FF, ...
7
votes
1answer
7k views

How do I convert (.gif to .png) this image to get the original view?

I am trying to convert this image, http://en.wikipedia.org/wiki/File:Dijkstra_Animation.gif, to a series of .png files. This was pretty simple, I used the convert command in Linux, convert ...
2
votes
2answers
320 views

Why shell commands for PNG file in Windows 8 doesn't work?

I have exactly same task like here: Windows 7 - Add shell command for .png file But this solution doesn't work in Windows 8 for unknown reason only for PNG files. And I don't know why. I tried some ...
1
vote
1answer
51 views

Postscript to png conversion loss

When converting Postscript files to PNG, is there any loss of fidelity in the converted files? The postscript files are scanned at 1200DPI. If there is such loss, how can it be kept minimum? I'm ...
8
votes
1answer
20k views

How can I convert a series of PNG images to a video for YouTube?

I have a sequence of PNGs (here is one specimen) which I turn into a video with ffmpeg: ffmpeg -r 10 -i image%03d.png -s 1380x720 -c:v libx264 -qscale 10 -r 30 basf_merck_libx264.mp4 With ...
2
votes
1answer
574 views

Why are colors changed in the preview for my clip on YouTube?

I have 1000 PNGs created with R and ggplot2. This is one for example: image000.png Now I use ffmpeg to glue them together into a clip: ffmpeg -r 10 -i image%03d.png -s 1380x720 -vcodec png ...
0
votes
2answers
2k views

convert serveral image files to a single djvu file

Suppose I have serveral BMP image file, say 001.bmp, 002.bmp,..., 100.bmp. I want to convert these files to a single djvu file, whose first page is the content of 001.bmp, the second page is the ...
8
votes
2answers
6k views

“Bake” an SVG image into a PNG at a given resolution?

I'm on Linux and I'd like to take an SVG file and bake it into a PNG file at a given resolution (scaling). Is there a way to do this quickly and effectively from the command line? I'm looking for ...
5
votes
1answer
1k views

Convert png sequence to x264 with ffmpeg

I am trying to convert a series of pngs into an mp4 video. I am using ffmpeg, and want to encode the video with the H.264 codec. Using the command ffmpeg -y -r 30 -b 1800k -i _tmp%04d.png -vcodec ...
4
votes
3answers
2k views

Building ImageMagick on OSX Lion and can't link libpng

I am trying to build ImageMagick 6.8.0-5 on OSX Lion with support for libpng. I am just using the standard ./configure make make install procedure. I succeed in compiling when I do not reference ...
1
vote
1answer
102 views

Most space-efficient format for image with large dimensions but few colors?

Recently I have had to scale up the dimensions of a gif image by a factor of 2, this resulted in an increase of the file size by about 8 times. While this is not a complete surprise, I can't help but ...
0
votes
3answers
204 views

Identify specific PNG format

How can I tell, ideally with an Imagemagick identify command, whether a particular PNG is PNG32, PNG24 or PNG8? The %z or %[depth] gives the sample depth (not the pixel depth), which is always 8 or ...
4
votes
2answers
513 views

Automating the choice between JPEG and PNG with a script

Choosing the right format to save your images in is crucial for preserving image quality and reducing artifacts. Different formats follow different compression methods and come with their own set of ...
1
vote
0answers
680 views

.MOV video compressed with PNG has no alpha channel

I have a QuickTime file .mov with alpha channel compressed with PNG codec. What I need is to create smaller version of this file using ffmpeg. Everything works except new mov has no alpha (Adobe After ...
0
votes
1answer
489 views

How can I add metadata to PNG images on OS X/Linux?

Is there a program for OS X and Linux that I can use to add Textual information to PNG image files? Something for Windows also, maybe?
2
votes
1answer
874 views

Batch convert svg to ico, specifying size?

In Windows, I have a GNOME icon theme in the svg format; several svg files residing within subfolders. Is there a way, on the command line, to convert these to ico files with the same name in the same ...
0
votes
1answer
550 views

I need to convert a bunch of *pngs to *.mpg in linux/CENTOS. How can I do this?

Title says it all, and I am not too familiar with LINUX, but I can get by if I get some help. I am looking for a way(s) where I can do the above, or in lieu of that, download a program that will do ...
0
votes
1answer
282 views

PNG works on iPhone but not through computer

I downloaded an app from Cydia called "Conway's Game of Life" to both my iPhone and my computer. On the iPhone it renders correctly, but on the computer some of the PNG files of the Cydia .deb ...
2
votes
2answers
307 views

Corrupt PNG files after unzipping

I downloaded 7-zip for Windows to extract .png files from .deb archives, but they turn out corrupted, showing a black background instead. Is there an alternative, working program for unzipping .deb ...
1
vote
2answers
1k views

Imagemagick convert making strange gif

I am trying to make a GIF from a set of PNGs (files like f0010.png). convert *0.png out.gif The GIF is coming out strange -- not looking like the PNGs, cutoff, stuff missing, etc. I tried also ...
0
votes
1answer
167 views

ming 0.4.2 compilation errors on Ubuntu 12.04 when installing from source code

I am trying to install ming 0.4.2 from source code and it was compilable before on Ubuntu 10.04, but now it' giving following compilation errors when I try to install using command sudo make install ...
1
vote
0answers
239 views

Render Video as png with Alpha

I have pixel art that I want to put in an animated png. I animated it in the timeline, but when I rendered it into a series of pngs, It has no partial transparency. Anyone know how to solve this?
4
votes
3answers
5k views

Convert image to uncompressed PNG from the command-line

I have a compressed PNG image compressed.png. I can convert it to an uncompressed PNG decompressed.png using GIMP (saving as PNG and setting compression level to 0). How can this be done on the ...
2
votes
1answer
332 views

PNG displays differently in Firefox

Currently I'm working on a website with some bright colors. I'm trying to implement a seamless overlay on top of a few images, to give the sensation that the background is flowing over the image, ...
2
votes
2answers
549 views

PNGs with Black Backgrounds

Why is it that when I copy/paste PNG files with a transparent background into photoshop that they show up with a black background, whereas if I save them, then open they're transparent? I find it ...
14
votes
9answers
44k views

How to reduce PNG file size for web?

I have a PNG-24 file with transparent background and its current size is 1.5 MB. How to reduce size or use PNG-8 file format and keep same quality ? PNG file from here: ...
3
votes
1answer
5k views

PNG alpha rendered as black in Blender

I'm a Blender novice, so this is probably easy to fix. When I use a transparent PNG as a texture in Blender, the parts that should be transparent are rendered as black. This is especially confusing ...
3
votes
2answers
185 views

How can I convert a PNG to a vectorized image?

This is the best I've found so far: http://www.tlhiv.org/rast2vec/ It works otherwise ok except that it does not support PNG transparency (it's simply gone in the resulting vector).
0
votes
1answer
4k views

How can I create a 24-bit PNG with alpha and no transparency in Fireworks CS3?

We're creating icons for a mobile app, and the developers have asked for very specific files. One needs to be 48px x 48px and has to be a 24-bit PNG with alpha and no transparency. I'm using ...
0
votes
1answer
1k views

ffmpeg and png watermark issue

I tried to create a watermark (using a png image) on a video like this: ffmpeg -i test.wmv -b:a 300k -ar 22050 -t 10 -f flv -s 352x288 -vf "movie = watermark_logo352.png [watermark]; [in][watermark] ...
0
votes
1answer
109 views

Local Apache won't send PNGs correctly

Can't figure this out: Yesterday my local Apache config was sending PNGs just fine, today the browser is trying to decode them as JPGs and thus, only showing a "missing image" error despite returning ...
3
votes
2answers
580 views

Windows 7 doesn't show image size for all images

On Windows 7's new file layout in Explorer. Some PNGs will show the size whereas others won't. I've tried rebooting and clearing the cache, but it doesn't work. Also, all of these images were saved ...
1
vote
0answers
940 views

Set .png default compression in Photoshop CS6

Is there a possibility to set .png default compression options to "NONE / fast"? Whenever I try to save as .png, the default option is set to "smallest / slow".