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

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Batch extract thumbnails with ffmpeg

I need to batch extract thumbnail pic from hundreds of .mpg files using the following bat code, which works like a charm, but the only drawback is that the output png are with file name like "filename....
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19 views

How to install ImageOptim-CLI (Manual Installation)?

ImageOptim-CLI = batch image optimizaiton Basically, i'm an amateur on apple's script terminal. The creator of ImageOptim-CLI has been posted the installation guide. But, i still don't get it and ...
2
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0answers
67 views

Why have multiple PNG files been transformed to glitches on the external hard drive?

Pictures have been made and edited using Adobe Photoshop and saved as PNG on a MacBook If the hard drive of the PC is almost full the edited pictures will be copied to an external hard drive in order ...
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23 views

Is there any quality in loss in FFMPEG when converting to .PNGs?

I need to dump video files to their individual frames as .png files, and I'm using FFMPEG to do so like this: ffmpeg -i video.ts -r 59.94 dump/%d.png Now, I get all of the frames I need, and they ...
3
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0answers
107 views

Windows 7 Colors (PNG darker in browsers)

A few days ago I installed f.lux, and since then I've noticed that my PNG images look darker in Firefox. I've never encountered such a problem before. It doesn't work with it (f.lux) disabled either. ...
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1answer
40 views

Prevent Office 2010 from opening Hyperlinks in Internet Explorer

I have several hyperlinks in an Excel 2010 sheet that are .png image files. I have .png files set to open in MS Paint. In Windows 7, clicking a link would directly open the file in MS Paint. But in ...
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1answer
90 views

ffmpeg convert image to mpeg/mp4 gets mp4 file with 0 bytes

I'm trying to convert a png file to mp4 file but I get 0bytes mp4 files. Here is my code structure: ffmpeg -r [framerate] -i [images] -s [resolution] -vcodec libx264 [videofilename].mp4
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1answer
63 views

ffmpeg convert image to mpeg/mp4

To convert jpg to avi this code works perfect on my server shell_exec("ffmpeg -f image2 -r 1/10 -i image.png out.avi"); I need to convert jpg/png images to mp4/mpeg. How do I do this?
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2answers
76 views

Why do these PNG images differ so much in size?

I created a lot of tiles and each of my tiles is less than 2 KB except one which is 16.2 KB. It is very similar to another tile I created which is 1.48 KB. Yes, I'm nitpicking about the sizes here but ...
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1answer
38 views

Batch Inverting .PNG Images while maintaining transparency

I have a large number of monochrome PNGs that are black on transparent. I would like to invert them to be white on transparent. I've tried using XnConvert but it doesn't maintain the transparency.
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21 views

What kind of compression is PNG - ZIP in irfan

I downloaded the DLL plugin for PDF files and and am extracting files to PNG compression level 1. Information for extracted files says "compression PNG - ZIP" Are they still PNG files or ZIP files ...
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2answers
85 views

Batch Convert BMP to PNG & keep original created/modified dates

I have many screenshots from video games over the years that I want to convert while maintaining their timestamps so I can keep them chronologically organized with other images. I've already used an ...
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0answers
17 views

Photoshop can not open screenshots from Skype [duplicate]

I am using Photoshop CC 2015 on my PC and also Skype. Whenever someone shares a screenshot with me via Skype I have to go ahead and save is in my personal files, and then open it manually from there ...
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0answers
31 views

pnmtopng on large file

I am running pnmtopng on a 101M, 3000x4000 pixel PNM file. I get the error pnmtopng: ASCII decimal integer in file is too large to be processed. every time I run it. I looked through the source and it ...
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0answers
57 views

Convert image sequence to animated GIF in OS X command line without 3rd party tool?

Is it possible to convert image sequence (e.g. PNG) to animated GIF with OS X command line (sips)? There is many guides that show how to make GIF to PNG, but not with other way. I know there is like ...
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1answer
60 views

How to convert PNG to ICO so it doesn't get resized

I have this small icon: The problem is that it gets resized whenever I use it for my application: I need it to stay it at 16x16 and not get bigger. Note I'd need to do the same with more than ...
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0answers
27 views

Some PNGs are not being displayed on IE8

I'm performing QC on an eLearning course my team has built and I'm having an issue with some PNGs that are not being displayed on IE8. Within IE9, IE11, and Chrome, the images are shown (floating ...
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1answer
40 views

Github Gists - Download Gist as Image File for Code Report

I have some pretty huge SQL queries as github gists and I would like to download them as images (eg PNG) in order to put them in a Word report document. I cannot find a way to do that, they just ...
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1answer
570 views

How to change the default editor for PNG files from MS Paint to paint.net in Windows 10?

I have paint.net installed in my Windows 10 Pro. When I right-click a PNG file in the Windows Explorer, I see the Edit command. However, it opens the Windows Paint app, and I'd like to change it to ...
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1answer
31 views

How do I discard transparency channel when encoding files with bpgenc?

Sometimes png pictures contain redundant alpha channel. While this is usually not an issue, for libbpg it triggers more complicated mode which is not compatible with fast x265 encoding or with ...
2
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1answer
61 views

Imagemagick convert -append producing incorrect output

I am trying to stitch together a sequence of images. The first few seem to work fine, but after a couple, bad images appear instead of the specified images. Here are the first several images: pieces-...
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242 views

How can I edit PNG file rating property value in Windows 10?

In Windows 7 and 8 I was able to edit the rating of PNG files by right clicking on that file and going to Properties, Details, Rating. In Windows 10 this is not available anymore for PNG files, but ...
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1answer
322 views

Batch convert images to ASCII art in GIMP

I want to convert a photoset of .png pictures to .txt files using the ASCII art generator of GIMP. I can do this individually just exporting the picture as .txt format, but I can't find any batch ...
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1answer
348 views

Create empty truecolor PNG with ImageMagick

How can I create an empty (transparent) PNG containing 24 bit color channels with ImageMagick? The obvious one convert -size 1920x1080 xc:transparent blank.png will create an 1bit b/w ...
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2answers
48 views

Comparing two images without fully downloading?

I want to download a copy of a big image file(+20MB) whenever it changes. But without downloading it every X seconds and comparing it with the old version i have, how would i know the image has ...
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2answers
117 views

What kind of image compression causes this color banding? [closed]

I have two images. The first is before undergoing lossy compression: Picture #1: The second is after undergoing lossy compression: Can anyone explain to me what is going on here? How does this ...
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2answers
163 views

How to know the compression level of a PNG file and whether it is lossy?

Can I know whether a PNG file was compressed and how (at least, whether it was a lossless compression) in Windows? When I open the standard file properties dialog from the Windows Explorer, I see no ...
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1answer
3k views

FFmpeg - PNG / JPG - Invalid data found when processing input

I am trying to add a watermark to a video with FFmpeg. I have a custom build of FFmpeg that I am creating with a view to keep the binary size down. I seem to have excluded the ability for FFmpeg to ...
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2answers
271 views

Find out PNG transparent background color on Linux

It appears that PNG files contain background color information for transparent pixels. This sometimes becomes noticeable when using that image as a texture with wrong settings. How to find out in ...
2
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1answer
119 views

PNG or JPEG for an X-Ray without visible artifacts

A past paper question from a Multimedia Systems exam: If you had an X-Ray photograph of a leg which might be broken, which would give better compression before artifacts were visible, and which ...
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1answer
26 views

Substracting colors and extracting transparency values

Lets say a picture was made to semi-transparent and added on a flat background color. The original picture, background color and result(mixture) is known. But, that added transparency(alpha value) is ...
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1answer
202 views

Best way to convert BMP to PNG while maintaining quality?

Is this possible convert BMP to PNG while maintaining quality? I am trying to reduce the size of some albums that are in BMP, but still maintain the lossless quality. Just tried XnConvert and setting ...
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150 views

.png images load great - .jpg images are blurry on website

I've searched around and found lots of information about blurry images and I've implemented some of the fixes I found and it worked on about 50% of them. I'm posting Android apps and iOS apps - all ...
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2answers
214 views

ImageMagick's mogrify tool darkens PNGs (when only trying to resize)

I'm trying to use the simple command to resize images and overwrite the originals: mogrify -resize 80% * My source images are semi-transparent PNGs that happen to be grayscale. The resize operation ...
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2answers
900 views

Export excel chart to png with certain dimensions

How do i export an Excel chart to a PNG image, defining the exact size of the resulting image file? I need to export some excel charts to PNG to put them on a html page. Due to design restrictions, ...
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2answers
6k views

overlay transparent animation over video with ffmpeg

Overall task is to overlay animated infographics over video. What I would like as a result shown in this video http://www.youtube.com/watch?v=ZhMF3WD9pr0 Nice animated semi-transparent cyan line on ...
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0answers
1k views

What is @OpenWithToastLogo.png?

Background Recently, I copy-n-pasted some text from Notepad into a command line window. The copied text included a TAB character prefixing the text I copied, for example "{tab}test.exe". When I ...
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380 views

avconv and ffmpeg: errors reading png files

I'm trying to use avconv to overlay data onto a video. I generate PNG files representing the overlay data at 4fps. The PNG files are the 120px wider and 60px taller than the original video, because ...
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6answers
19k views

How is PNG lossless given that it has a compression parameter?

PNG files are said to use lossless compression. However, whenever I am in an image editor, such as GIMP and try to save an image as a PNG file, it asks for the compression parameter, which ranges ...
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2answers
760 views

Convert PNG to Multi-page PDF

I've seen a lot of posts about how to convert a multi-page PDF to PNG but I'm wondering how I can go in the opposite direction if I have the size of each page I want made.
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1answer
46 views

I would like to batch change one colour in a group of PNGs. Mac - freeware software

I hope someone would be able to help me. I have a group of icons in png format. They are all transparent backgrounds with one colour for the actual icon. I would like to change this colour in all of ...
5
votes
1answer
19k views

how to remove a png file's background using Paint.NET

I have a PNG file that is composed of only two colors: white and dark. Majority of image space is occupied by the white color but I want to remove this white color, thus giving the image a transparent ...
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1answer
370 views

FFMPEG combine PNGs of different size into movie

Is it possible to combine PNG of different heights without rescaling (like tile does)? I have pairs of images of same width, but first has height 900px and second 200px. I would like them to merge ...
5
votes
1answer
3k views

correctly sizing PNG images in markdown with pandoc for html/pdf/docx

I am trying to use markdown with pandoc to convert a single document into html, pdf, and docx. It's an extremely simple document containing only math-less text and a few images. The images are in ...
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2answers
25 views

PNG file has different colours in different programs

I downloaded an icon from Icons8. With their tool I recolored it to dark blue (#2c3e50). After unpacking and uploading the 48px icon I got the following result: As you can see the color is not #...
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2answers
4k views

File Attributes - AI …Any clues?

Can anyone point me what does it mean when a .png file having 'AI' as File > Properties > Details > Attributes. Does it mean it made with Adobe Illustrator ? Also note that the png is 8bit image.
2
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1answer
388 views

PNG/BMP images become blurred on zoom

I recently installed a Debian Jessie desktop and when opening PNG/BMP images it all becomes blurred on zoom (in or out). With the image at 100%, everything looks sharp as expected. This happens both ...
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1answer
223 views

How can I explode an animated PNG?

Websites like GIF Explode allow you to "explode" an animated GIF into its component frames, and similar results are presumably easy to achieve with standard image-editing tools like GIMP, ImageMagick, ...
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votes
2answers
612 views

How can I create an MNG file out of PNGs?

I am really struggling to find compatible software that will allow me to animate PNG files. The GIMP plugin crashes my GIMP. Nothing else supports it. Is there any way I can easily put together the ...
3
votes
1answer
2k views

Why are there no video formats that support transparency?

Why are there no [widely supported] video formats that support transparency? For example, the PNG image format supports transparency, allowing for some interesting effects in websites and documents. ...