Compress Images Using FFMPEG

Question

Kindly let me know if there is any method to compress image using FFMPEG

ffmpeg -i img.png imgOut.png

How to compress the output image or change the quality if it

llogan · Answer 1 · 2018-12-08T21:33:48.930

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PNG

Just use the default settings. PNG is lossless so there is no way to control the quality, but you can control the compression. You can use -compression_level for PNG output if you want less compression. Range is 0-100. Default is 100 which is most compression meaning that the defaults provide the smallest output file size.

Output a series of PNG images from a video. Files will be named output_0001.png, output_0002.png, output_0003.png, etc.

ffmpeg -i input.mp4 output_%04d.png

Output a single PNG image from a video at around 00:02:00.

ffmpeg -ss 00:02:00 -i input.mp4 -frames:v 1 output.png

If you want additional processing refer to pngcrush, optipng, advpng, etc.

JPEG

For JPG output see How can I extract a good quality JPEG image with ffmpeg?

edited Dec 08 '18 at 21:33

answered Mar 31 '15 at 21:04

llogan

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if i use `ffmpeg -compression_level 50 -i thumb-intro.png imgOut.png` it gives Codec AVOption compression_level () specified for input file #0 (thumb-intro.png) is not a decoding option. – Muhammad Omer Aslam Aug 29 '17 at 15:22
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@MuhammadOmerAslam Option placement matters. You're trying to apply it to the input. Move the option so it applies to the output. `ffmpeg [input options] -i input [output options] output` – llogan Aug 29 '17 at 16:17
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This question is on top in google with `"Compress Images Using FFMPEG"` keyword. please add some info about JPEG in your answer too. thanks – S.R Dec 08 '18 at 19:19
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@S.R I added a link to a JPG answer addressing that. – llogan Dec 08 '18 at 21:29
No, -pred mixed is much more important. – Валерий Заподовников Mar 05 '22 at 13:21
And no, range is 0-9. 10 and higher are bitperfect. – Валерий Заподовников Mar 05 '22 at 20:26

score -2 · Answer 2 · answered Mar 31 '15 at 21:00

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PNG is a lossless image format, so you can't really toggle the compression ratio in any useful way. Typical options such as -b:v only apply to formats to which ratecontrol applies (e.g. most video codecs, or .jpg for images).

answered Mar 31 '15 at 21:00

Ronald S. Bultje

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This is absolutely wrong. – Валерий Заподовников Mar 05 '22 at 13:20
PNG is a lossless image format, but you can cut off it's quality to reduce the size of the file by using some algorithms for example color degrade. – 0xAA55 Jan 05 '23 at 02:58

Compress Images Using FFMPEG

2 Answers2

PNG

JPEG