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

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5
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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 ...
3
votes
1answer
1k 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
93 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
2answers
121 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
428 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
516 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
339 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
568 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
377 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
204 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
218 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
831 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
156 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
214 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
3k 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
306 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
428 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 ...
10
votes
9answers
23k 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 fro here: ...
3
votes
1answer
3k 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
157 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
2k 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
103 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
457 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
781 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".
2
votes
1answer
1k views

multiple png images over a single pipe to ffmpeg (no file writes to disk!)

I have a program that generates a script for gnuplot, which in turn generates a lot of png images and send it to stdout. I want to pipe these images to ffmpeg without writing them to the disk. This is ...
0
votes
1answer
1k views

Saving image as PNG-24 in IrfanView

Is it possible to save an image as PNG-24 in IrfanView? I am asking this because the edges around circular lines get disturbed when saving the image as transparent. I heard that this might be due to ...
1
vote
0answers
84 views

A photoshop png file all the same size generating dilemma

I have a photoshop file with layered componpents that I am animating. I need to save each layer of each element as a png file with the same dimensions (so if a box moves, 3 layers of the psd file have ...
0
votes
0answers
518 views

Mac Cursor PNGs

So I found a collection of PNGs for authentic Windows cursors. Does anybody know where I can find the same for OSX? The only one I've found so far is the following standard black cursor:
0
votes
4answers
3k views

Best way to export powerpoint slides into pngs with different resoltuions?

I am trying to convert powerpoint slides into a png. I know that there are several ways that allow to do this by allowing for changing the resolution (e.g., within powerpoint by changing the registry, ...
6
votes
2answers
19k views

IE8 wont display .PNG images

I really don't know how the user managed to do this but for some reason .PNG images are no longer working in IE8. When viewing a page that has .PNG images on it they are just displayed as a little ...
1
vote
2answers
1k views

lossless PNG to video in Imagemagick

As an intermediate step in creating an animation, I need to put a bunch of sequential PNGs into a movie file. I tried ffmpeg but was getting compression and artifacting even when I set quality to ...
4
votes
1answer
15k views

Is there any quality difference between PNG vs BMP image formats?

I have just learned that PNG is a lossless image format while BMP can be both uncompressed or lossless format. Should there be a quality difference between these two? If not, does it mean that other ...
1
vote
1answer
947 views

How to convert a photo without losing quality?

I have to convert a bmp into another standard format, without losing quality. To which format shall I convert it to?
9
votes
7answers
19k views

Multiply blending mode to PNG

I have a layer in Photoshop with multiply on, when I however save to web it loses the blending mode. How can I keep multiply or achieve the same effect in another way?
36
votes
5answers
21k views

How do I convert an SVG to a PDF on Linux

How do I convert and SVG (containing a a few words of latin text and some simple vector graphics) to a PDF on Linux? I tried Inkscape 0.47 on Ubuntu Lucid, but it moves some sub-graphics randomly, ...
2
votes
1answer
615 views

Keep alpha transparency in indexed PNG from Fireworks when batch resizing using convert (ImageMagick)

I have a special case where I'm using alpha transparency in indexed PNGs from Fireworks to keep the file size of PNG's in an iOS game down. (That is, indexed colors like an 8bit PNG but alpha ...
1
vote
1answer
524 views

Make the extension .fw.png open in a different program to .png?

I want files ending in .fw.png to open in Adobe Fireworks but I want regular .png files to open in my standard image viewer program. Is this possible?
3
votes
1answer
1k views

What is the best way to create a single PNG image containing multiple PNGs of the same size?

What is the best way to create a single PNG image that contains multiple PNGs of the same size, such as 32x32 and 64x64? I have a lot of images that I need to include in a single image so I can load ...
6
votes
2answers
511 views

Why do two 50% opacity layers of the same color don't make the solid color in Photoshop?

I am trying to create a gradient that when flipped and overlayed on itself will show a solid color. I thought I would make it with a regular solid-to-transparent gradient on Photoshop, and save it as ...
19
votes
3answers
3k views

Is it possible to store arbitrary data in an image file?

Is it possible to store arbitrary data such as documents or a program in the form of an image file, such as a PNG image? My concern is that someone could encode data for use by malware into an image ...
7
votes
4answers
6k views

Convert many images to one PDF

How can I convert about 100 PNGs to one PDF on a Mac? I'm open to using the command line if it helps. I have tried using iPhoto, but it quits, not sure why. Saving from Preview doesn't quite do what ...
11
votes
2answers
11k views

How to create an uncompressed AVI from a series of 1000's of PNG images using FFMPEG

How can I create an uncompressed AVI from a series of 1000's of PNG images using FFMPEG? I used this command to convert an input.avi file to a series of PNG frames: ffmpeg -y -i input.avi -an ...
0
votes
2answers
5k views

Can I export a PNG image from Word? [duplicate]

Possible Duplicate: Copy Image Out Of Microsoft Word Someone sent me a doc file with a picture in it. Probably it is a png. I want to save the picture in order to paste it to other ...
1
vote
2answers
5k views

(Batch) convert a BMP to a PNG with transparency

I have +- 500 .bmp's that I would like to convert to .png's. It would be especially nice if the color white (#FFFFFF) of the original BMP's could be converted to transparent in the .png's. PNG-8 is ...
0
votes
2answers
68 views

How do I apply a border on a picture from another picture [closed]

I want to add the border on this picture: to this picture: How do I accomplish this?
6
votes
1answer
2k views

Is it possible to make a .png (or other) image that does NOT have rectangular dimensions?

This might be a dumb question, but is it possible to make a .png file that isn't square? If so, how can one do this in Gimp? Ideally I'd like one in the shape of an X.
0
votes
2answers
1k views

How to remove a set of pixel columns from an image, using GIMP?

To clarify, say I have an image that is 100px wide and 50px high and I want to make it 50px x 50px, by removing columns from the MIDDLE of the image. i.e. I want to keep the left side of the image, ...
1
vote
2answers
141 views

Software for lowering the colors in PNG-24 files

I am searching for a software that will allow me to reduce the number of colors for PNG-24 transparent (as in photoshop) files. Photoshop doesn't allow me any control over the amount of colors the PNG ...
1
vote
4answers
233 views

How do I explain to my mother how to convert a bunch of PNG files into JPEGs?

Mom asked me to scan in a bunch of photos for her previously, and I scanned them in as PNG files; namely because most any software package can read them, and they don't throw away any of the photo's ...