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JPEGDEC Alternatives
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NOTE:
The number of mentions on this list indicates mentions on common posts plus user suggested alternatives.
Hence, a higher number means a better JPEGDEC alternative or higher similarity.
JPEGDEC reviews and mentions
Posts with mentions or reviews of JPEGDEC.
We have used some of these posts to build our list of alternatives
and similar projects. The last one was on 2024-04-08.
- karpathy/llm.c
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Family Photos vs 256 Kb RAM
It takes some time to decode, but I can grab- for example- this 259k JPEG: http://placekitten.com/3840/2160
And display it from the microSD card with this code: https://gist.github.com/Gadgetoid/0b8e352e377135d743338c9483...
As more or less demonstrated by this example: https://github.com/pimoroni/pimoroni-pico/blob/main/micropyt...
Decoding is done via Larry Bank's JPEGDEC: https://github.com/bitbank2/JPEGDEC
It uses roughly 20k RAM to provide the necessary buffers both for decoding JPEGs into blocks which are passed to a drawing routine that handles copying the data into the display RAM buffer (on our larger Inky display this is backed by PSRAM). I don't believe there's a hard limit to the size of the JPEGs you can display. The main bottlenecks are decoding time and the relatively limited scaling options: FULL, HALF, QUARTER, EIGHTH.
This aside, the authors solution is actually quite elegant. As long as you have control over the image pipeline there's no real reason to encumber the device with handling large (both in bytes and pixel dimensions) files. You'll also get much better dithering results writing your own routine to convert files from JPG to the raw 4-bits per pixel format for the display. Our built-in dithering is just a plain ordered dither matrix and, while quaint and retro, it leaves much to be desired visually.
If you're trying to use a public API you can also make GitHub actions automate the whole image conversion process and publish the results to GitHub pages. This works great for, for example, the daily XKCD, serving both to reformat the strip for the display, credit the author, extract the "alt" text and avoid excess requests to the origin. Eg: https://pimoroni.github.io/feed2image/xkcd-800x480-daily.jpg. Though the astute will notice I still opted for jpeg in this case.
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Making a tiny video player using an ESP32 programmed in Arduino. Managed to fit all of the components into a tiny space and am about to order my PCBs. Wish me luck!
I'm doing the same thing with MJPEG and the JPEGDEC library https://github.com/bitbank2/JPEGDEC. I preprocess the video using ffmpeg to scale the video down to 240x240 and remove the compression.
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A note from our sponsor - WorkOS
workos.com | 28 Apr 2024
Stats
Basic JPEGDEC repo stats
5
337
7.8
about 1 month ago
bitbank2/JPEGDEC is an open source project licensed under Apache License 2.0 which is an OSI approved license.
The primary programming language of JPEGDEC is C.
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