Questions tagged [image-conversion]

Converting an image into another format or color space

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Convert embedded M4V thumbnails from PNG to JPG

I have a load of M4V files that I've ripped from disc, and went to the trouble of embedding images in the metadata for all of them. Most are in PNG format, but minidlna doesn't recognize anything ...
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FFMPEG compress a I-frames into a P-frame, given a I-frame before

I have two consecutive I-frames (uncompressed jpg or numpy image) and i want to compress the second one into a P-frame and than later do the reverse. Is this possible with FFMPEG?
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How to convert BMPs (bitmap black&white) to 1-bit color depth animated GIF

I have a sequence of BMPs that are 1bpp (1-bit color depth, black & white of course). I want to combine them into a single animated GIF, with 1-bit color depth. Is this possible? So far I have ...
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How to batch convert PNGs to JPEGs and preserve timestamps in filesystem & EXIF header?

I sometimes take screenshots on my Mac during video-calls with friends/family (with their consent of course!) and would like to add those images of a photographic nature to my Apple Photos Library. I ...
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Is it safe to simply rename a .jfif file to .jpg?

I downloaded several images that are are .jfif files. I have various enhancements (e.g. context menus) and processing scripts that are keyed to *.jpg files and would like to use these with the new ...
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Convert table image to Excel, using Excel

I have the table below in the image png file format. Would it be possible to convert this to an Excel table using Excel?
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On Widows, how can I screen capture, then paste as JPG (not PNG) into gmail?

How can I capture part of a screen on Windows 10, then paste as a JPG? Using the inbuilt snipping tool and third party tools, the resulting pasted image ends up as a PNG in Gmail. PNG files are ...
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Can I create an image with a specific size in bytes?

I want to create an image file so it's exactly 5MB for testing purposes. Is it possible?
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Bulk convert image-data URIs to images

I have a text file of 391 image-data URIs, one on each line. I need to batch-convert them all to images, named according to their sequence (i.e. image001.png, image002.png or similar). What do people ...
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How can I open or convert JTIP (jpeg tiled image pyramid) files?

I've found some old photos (.jpg) from 2005 on a harddrive and can't find a way to view them. Using droid, I found out that these seem to be JTIP (jpeg tiled image pyramid)-files. The puid of this ...
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How to convert an image of a document into a high contrast black and white image? [closed]

What I mean is, let's imagine I take a photograph of a document, diagram or whatever. Now if I put this photo into a document it feels weird, even though the background color is white it's not as ...
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Batch convert WebP files to GIF files offline?

Writing a batch script to convert all WebP files to be GIF format. Looking at the closest utility offered by Google, I don't see an immediately obvious way to do that. I don't like having to use ...
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How to bulk convert Base64 to images in an Excel file

I have an excel file with 500 rows of image URIs in Base64 (as you can see in the image). I need to convert them to images and download them to my computer. Is there a website/tool/code that can do ...
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How to convert png to draw.io xml

I would like to convert an existing png to the draw.io xml format bit don't know how to do nor do I know if this is even possible. As an example, the following image .. would be described as this: &...
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How can I convert a PDF into a series of Images (JPGs or PNGs) via the terminal on mac?

I have a pdf and I'd like to convert it to a series of images, numbered 0001.jpg - XXXX.jpg ? I found this so far sips -s format png your_pdf_file.pdf --out your_png_file.png but it seems to only ...
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4 answers
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How to convert multiple images at once from JPEG to PNG?

How can I convert multiple images at once from JPEG to PNG? The JPEG to PNG converter on my MacBook does not convert many images quickly at once. My option is now: Convert JPG to PNG - JPG4PNG
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How to batch process pictures to split and reassemble them vertically?

I have 6,000 pictures with two horizontal bars of text in them, one at the top, one at the bottom. The goal is to cut the top bar and put it under the bottom bar of text. How would I do that in a ...
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Why does Imagemagick convert JPGs to larger image size than PNG?

I have a collection of textures for 3D design. Each folder of my collection contains the texture files (normal-map, colour-map, bump-map etc) and a preview file, like so: Now I want to create icon ...
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How do I convert stereoscopic 3D photos (.sjpg, side-by-side, interlaced) to Facebook-compatible depth-map+stereo pair .heic 3D?

*.heic is the "new jpg" being pushed by Apple, Samsung, etc. It is a improved image format. Facebook not only supports glTF 3D models, but also now supports iPhone 7 & iPhone 8 3D photos, which ...
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Convert bmp to png and black colors to alpha

I exported some sprites from the game Half-Life; however, they seem to have tones of black instead of the alpha channel. For example: How do I convert the black colors into alpha/transparency?
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2 votes
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Combine images and gif to a single video?

My project is to join all image files (currently only JPGs) in a folder to a single video file. All images are the same size (1080p) and each one should be displayed for 3s in the output video. Here's ...
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3 votes
1 answer
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Conversion from GIF to PNG not working

I was looking for a way to break an animated GIF into the images composing it, and found many threads recommending: convert -coalesce Dijkstra_Animation.gif djik.png I ran this command but it fails. ...
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2 answers
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How to Split a Multipage Tiff File on Macintosh?

I see a similar question here, but it in for Windows. How can I break out a page of a multipage tiff file on Mac OS X Sierra? I've got Photoshop CS6 and Illustrator CS6 and Acrobat Pro DC, but none ...
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All of the pictures from screenshots I saved were saved as a .txt file. How do I convert them back into images?

I go to my files and select my "Pictures" folder. I then select my "screenshots" folder. Within this folder are all my screenshots, but for some reason saved as text instead of an image, and I would ...
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2 votes
4 answers
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Save images of different sizes as a pdf

I have multiple images, all of different sizes. What I want to do is save each image on its own page in a PDF document, with no white space around it. Would this be possible?
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slice and rearrange long skinny image to fit on screen

I have many images, each roughly 10000 x 40 pixels, visualizing graphs that are mostly chains with a few spurs and other "decorations." (They're made by piping OpenFST's fstdraw through Graphviz's dot)...
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6 votes
2 answers
2k views

Convert PNG or JPEG into PDF without reencoding

I have a JPEG (or PNG) image file and I want to create a PDF that contains this image without any quality loss. Just a one-page PDF document with that image. Is there an easy solution for this? I ...
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  • 247
13 votes
6 answers
50k views

How to disable WebP images in Chrome?

Google Chrome sometimes takes a .jpg image and converts it to a .webp file. The problem is that when I save this image to file, I cannot open the file. I have tried manually changing the extension of ...
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Monitor conversion help needed

In the early 1990s, I used Autocad 2, which used a CGA/EGA monitor. I still have the Autocad installed on an old IBM, but I don't have the monitor. I've seen converters that change the hertz (I ...
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3k views

Which ffmpeg flag fixes MP4 missing frames in Premiere?

We are converting a sequence of DPX images into an MP4 video: ffmpeg -start_number 101 -i dpx/example.%04d.dpx ./example.mp4 # minimal conversion ffmpeg -y -start_number 101 -i dpx/example.%04d.dpx -...
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1 vote
1 answer
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Why does imagemagick increase the file size of my pdf?

I have a pdf file containing a single page with scans of some documents. I want to remove obsolete parts of the page (I tried cropping and overlaying a white rectangle) and save it again. I expected ...
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-3 votes
1 answer
845 views

Converting BMP to PNG,JPG,GIF,TIFF quality differences

My question is what is the difference between PNG, JPG, GIF and TIFF in terms of quality, colour depth after converting BMP picture in those formats?
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1 answer
769 views

Converting image to mpeg/mp4 results in 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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7 votes
3 answers
3k views

How to convert multiple embedded PNGs to JPEGs in Powerpoint file?

I have a large PowerPoint file with many embedded images, some of which are JPEGs and some PNGs. To make the file as small as possible I would like all the PNG images to be converted to JPEGs. This ...
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1 answer
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Batch convert TIFF to PDF and add text

I have a bunch of TIFF files that I am interested to convert to a single multipage PDF file, which should be easily achieved using ImageMagick. However, I'm also interested in adding text to each ...
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3 votes
3 answers
6k views

Why is a PDF containing just one image much bigger than the image itself?

I would like to embed a scanned document into a PDF document. The source picture is about 300 kB. If I use the convert command, the PDF has a size of 30 MB, and with GIMP, 3 MB. Here the resulting ...
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1 vote
3 answers
2k views

How can I export a one page word document into an image of a particular resolution?

How can I export a one page word document into an image of a particular resolution? For example, suppose I have a word document, it has some word art on it, it is one page, it has some pictures, some ...
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5 votes
1 answer
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Size of GIF way too high?

I'm trying to extract a GIF from an MP4 video file. Now I have two modi with which I do this: 1) the regular one: ffmpeg -t 7.7 -ss 00:22:53 -i video.mp4 -i palette.png -s 320x174 -filter_complex "...
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How do I convert a JPEG file into a black and white (1-bit) monochrome TIFF in Ubuntu?

JPEG is a scan of a text document so not much to loose in terms of colour/tones. convert foo.jpg -flatten -monochrome bar.tif gives convert: BitsPerSample 1 not allowed for JPEG. 'JPEGSetupEncode' ...
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2 votes
2 answers
1k 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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0 answers
86 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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1 vote
1 answer
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ImageMagick montage always chaging from 32 bits to 8 bits

I am trying to create a montage from a series of 32 bit PNG images. However the result always gets reduced down to 8 bits with no transparency. Here's an example of one of the source images: http://...
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2 votes
1 answer
3k views

Convert image to video with empty audio track

I've found a good command to convert an image to a video in FFMPEG, but each image is going to be concatenated into a longer set of videos and images, and I need concat to concatenate the audio tracks ...
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1 vote
1 answer
50 views

image from video is black

I have been trying to grab an image from video using Print Screen. When I view it in Irfan View it looks perfectly normal, but when I try to upload it to Stack Exchange the image is black. I even ...
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5 votes
3 answers
2k views

Converting NEF files to JPEG

What is the fastest way to batch convert NEF files (Nikon RAW) to JPEG? I'v tried FastStone Image Viewer and Nikon's Capture-DX on my RAM-drive but they appear to be very slow, although Capture-DX ...
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2 votes
3 answers
89k views

How can I convert a PDF to an editable Visio file?

I have old PDF document (image of a map), and I want to import it into Visio to edit/update it. What is the basic workflow to follow. Attached is sample PDF. Is there a way to trace the lines/shapes ...
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56 views

converting scanned imaged into a single DjVu file

AFAIK there are several ways to do this on Linux. I'm a Window's user. Any way to do it on Windows?
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4 votes
1 answer
10k views

Use ffmpeg for JPEG to TIFF conversion

I would like to use Tesseract OCR with a video. With ffmpeg I can export some (.jpeg) images from a video. Can I convert a .jpeg into a valid .tiff or export directly .tiff images from the video with ...
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2 votes
1 answer
3k views

Convert black and white jpeg to binary string [closed]

Given a jpeg image with all black and white pixels, I want to convert all black pixels to 1's and all white pixels to 0's, and have these 1's and 0's output to a text file. Is there any program that ...
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2 votes
2 answers
2k views

Is there any command line docx to image converter available?

Is there any docx to image (jpg, png, bmp, ...) available with command line support? It's better to have one in windows, but if there is any in linux, that's great too.
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