Losslessly Compress GIFs

[Sound Master]

How do I compress GIF, as well as APNG and animated WEBP files without losing any quality?

[pandy]

Try 7z https://7-zip.org/ .

And btw i do not expect high compression gain but for sure eventual compression will be lossless.

Seem http://mattmahoney.net/dc/zpaq.html offers highest lossless compression so i would try ZPAQ firstly.

[Cornucopia]

Except of course, GIF has limited color palette, so if source is standard 24bit color (or anything higher than 256), there WILL be loss.


Scott

[pandy]

Except of course, GIF has limited color palette, so if source is standard 24bit color (or anything higher than 256), there WILL be loss.


Scott

? 7z or similar compressor offer lossless compression - no loss .

[DB83]

Here we go again !

[meeshu]

Image compression using one of the PAQ series of file compressors.

Advantage of PAQ compressors is high lossless compression of files. Disadvantage is compression may take a long time, depending on compression options.

Natively the PAQ compressors are run under command line, so may be difficult to use/understand at first.

However, there is a GUI available for the PAQ compressors here which may make it a bit easier to use.

[Sound Master]

Can any of you answer these questions?
https://forum.videohelp.com/threads/413904-Different-Sounding-Audio
https://forum.videohelp.com/threads/414007-Boilsoft-Video-Splitter-Keep-Subtitles-and-Audio-Format

[pandy]

Natively the PAQ compressors are run under command line, so may be difficult to use/understand at first.

However, there is a GUI available for the PAQ compressors here which may make it a bit easier to use.

Alternatively Peazip offer full support for various lossless compression methods: https://peazip.github.io/paq-files-compression-utility.html

[Cornucopia]

So wait..you want to take gif, apng, webp Sources and FURTHER compress them? Why? They won't be directly usable as their native formats then. Or is this simply another exercise?


Scott

[Sound Master]

So wait..you want to take gif, apng, webp Sources and FURTHER compress them? Why? They won't be directly usable as their native formats then. Or is this simply another exercise?


Scott

I just saw some compressors for those formats and wonder if any of them were lossless.
https://www.bing.com/search?q=gif+compressor&cvid=89281fb828244a3c8c26a2a22b5b245c&gs_...ANNTA1&PC=U531
https://www.bing.com/search?q=apng+compressor&qs=n&form=QBRE&sp=-1&lq=0&pq=apng+compre...&ghacc=0&ghpl=
https://www.bing.com/search?q=animated+webp+compressor&qs=n&form=QBRE&sp=-1&lq=0&pq=an...&ghacc=0&ghpl=

You could also look on Google.

[pandy]

I just saw some compressors for those formats and wonder if any of them were lossless.
https://www.bing.com/search?q=gif+compressor&cvid=89281fb828244a3c8c26a2a22b5b245c&gs_...ANNTA1&PC=U531
https://www.bing.com/search?q=apng+compressor&qs=n&form=QBRE&sp=-1&lq=0&pq=apng+compre...&ghacc=0&ghpl=
https://www.bing.com/search?q=animated+webp+compressor&qs=n&form=QBRE&sp=-1&lq=0&pq=an...&ghacc=0&ghpl=

You asked about something else - lossless compression for GIF+APNG+WEBP - and you already received few suggestions but after all seem you ask NOT for compression but for OPTIMIZERS - this something else. You should decide what is your goal as it seem this is not clear neither for you nor for us...

[Sound Master]

I just saw some compressors for those formats and wonder if any of them were lossless.
https://www.bing.com/search?q=gif+compressor&cvid=89281fb828244a3c8c26a2a22b5b245c&gs_...ANNTA1&PC=U531
https://www.bing.com/search?q=apng+compressor&qs=n&form=QBRE&sp=-1&lq=0&pq=apng+compre...&ghacc=0&ghpl=
https://www.bing.com/search?q=animated+webp+compressor&qs=n&form=QBRE&sp=-1&lq=0&pq=an...&ghacc=0&ghpl=

You asked about something else - lossless compression for GIF+APNG+WEBP - and you already received few suggestions but after all seem you ask NOT for compression but for OPTIMIZERS - this something else. You should decide what is your goal as it seem this is not clear neither for you nor for us...

All right, here's the deal: I have GIF, APNG, and WEBP files that are over 95MB, and I want to compress them to that amount or less without losing any quality. How do I do that?

[Cornucopia]

Perhaps those are just the size you should already expect them to be. 95MB is not unreasonable for hundreds or thousands combined, nor is it for even 1 pic if that pic is super-high-rez. You are giving no context here.


Scott

[Sound Master]

Perhaps those are just the size you should already expect them to be. 95MB is not unreasonable for hundreds or thousands combined, nor is it for even 1 pic if that pic is super-high-rez. You are giving no context here.


Scott

Well, what if the animated images were actually clips of 1080p videos that I converted into those formats?

[Cornucopia]

And how big (filesize) were those clips originally? Context.


Scott

[Sound Master]

One of them was 53.6 MB and I used Shutter Encoder to make it into a gif which was 450MB.

[Cornucopia]

Yes, GIF is an inefficient format compared to h264, h265. With no advanced intraframe compression and No real interframe compression algorithms, it's no surprise. For such material, gif is simply not a good choice, and likely neither is apng or webp. All of those make sense for animated stills, but not for videos, yet you're trying to fit videos into them.


Scott

[Sound Master]

Yes, GIF is an inefficient format compared to h264, h265. With no advanced intraframe compression and No real interframe compression algorithms, it's no surprise. For such material, gif is simply not a good choice, and likely neither is apng or webp. All of those make sense for animated stills, but not for videos, yet you're trying to fit videos into them.


Scott

All right, I understand if it's impossible to compress those types of animated stills without losing any quality.

[pandy]

All right, I understand if it's impossible to compress those types of animated stills without losing any quality.

No, you don't understand - you can use ZPAQ but don't expect high gain.

Generally GIF offer 256 colors maximum per frame - if you wish to have more colors then you need go for special GIF encoder https://en.wikipedia.org/wiki/GIF?useskin=vector#True_color (i'm not even aware if such encoder exist as GIF is very old format affected by some patents in early time of internet). However if you can accept quality loss using 256 colors per frame then ANY other modern codec will give higher quality and higher compression gain - just change GIF to different format.

I still have no clue what is your real goal but this is not my circus and not my monkeys.

[Sound Master]

All right, I understand if it's impossible to compress those types of animated stills without losing any quality.

No, you don't understand - you can use ZPAQ but don't expect high gain.

Generally GIF offer 256 colors maximum per frame - if you wish to have more colors then you need go for special GIF encoder https://en.wikipedia.org/wiki/GIF?useskin=vector#True_color (i'm not even aware if such encoder exist as GIF is very old format affected by some patents in early time of internet). However if you can accept quality loss using 256 colors per frame then ANY other modern codec will give higher quality and higher compression gain - just change GIF to different format.

I still have no clue what is your real goal but this is not my circus and not my monkeys.

I'm guessing ffmpeg and shutter encoder are those special ones? Anyway, how do I optimize animated images and videos without losing quality?

[Cornucopia]

Stop guessing - read the material on the net and try out the best contenders yourself, using clear scientific methods.


Scott

[Sound Master]

All right, I will. By the way, can you answer this?
https://forum.videohelp.com/threads/414018-Stop-Overriding-Files

[_Al_]

Why do you insist on answer after it was answered already? Also in VD2, exporting image sequences, you can choose to include frame number into an image file name, so after selecting different parts of the same video, frames will still have a unique names! You got that selection in the pop up window that you are looking at. You do not need timestamps, when you have that feature. It is a common image naming feature across hundreds of apps. It is an image sequence naming commonality. There is no need to come up with something extra.

[Sound Master]

Why do you insist on answer after it was answered already?

Wait, it was answered before? Where?

[_Al_]

It was asked by one of yours disguised nick name, I cannot keep up with the names, so I cannot google it for you.

[Sound Master]

It was asked by one of yours disguised nick name, I cannot keep up with the names, so I cannot google it for you.

I mean the part about applying timestamps to the names of the output files.

[_Al_]

I just told you, you do not need a timecode in image filename.

[Cornucopia]

I'm with you, @_AI_, more goofy obsession from yet another alias of a well-known troll.


Scott

[Sound Master]

I just told you, you do not need a timecode in image filename.

I mean for videos, not images. I want to automatically add timestamps/timecodes to the names of the output VIDEOS (e.g. mkv, mp4, mov) from Avidemux and VirtualDub2, not images.