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Re: JPEG announces availablility of CD Text for JPEG XT lossless and alpha

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On 2/7/2015 11:20 PM, Thomas Richter wrote:
> On 08.02.2015 04:36, Dex wrote:
>> So now if I may, allow me to ask the obvious Joe User question :-) ...
>> Now that it does transparency, how does JPEG XT compare with GIF and PNG?
>
> Same ballpark. But that goes for any lossless compression, it is always
> approximately 2:1, no matter what you do.
>

personally, I have seen some variation, but it is hit-or-miss.
for example, PNG does a bit better with some types of images, and a 
lossless JPEG variant does better with different images.

granted, yes, there is a limit as to how much something can be 
compressed losslessly.


>> I see that JPEG XT has no animation, so there's one difference
>
> No, not in this part. Is there much use of animation? Would we need it?
> There is always a possibility to extend it for animation, but I probably
> don't quite see the point. There are many better formats for animated
> pictures (aka movies) right now.
>

yeah.

for my JPEG variant, I had stuck it in an AVI container and used this 
for animations (in my 3D engine, if an AVI is used as a texture, it is 
interpreted as being a looping animation).

stuffing things in an AVI personally makes more sense then having to 
develop a special animated version of a given file-format (and, if 
really needed, a person could just give the AVI a different 
file-extension or something).


though, lack of interframe compression with JPEG can quickly become a 
problem (since every frame has a complete image, it doesn't really scale 
well to longer sequences).


not sure why AVI never really caught on for short looping animations.

though, yes, many conventional video codecs aren't really ideally suited 
to the short-animated-loop use-case either (as-in, using it like an 
animated GIF).

some of my custom codecs are derived from old-style video codecs, and 
work pretty good for short animations, though bitrate becomes a little 
more of an issue for longer sequences.

what works best for a 5 second loop, is not necessarily the best option 
for a 5 minute video. but, what works good for a 5 minute video, may 
also pose significant overhead if a large number of them are playing at 
the same time (favoring an emphasis on low decoder complexity).

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JPEG announces availablility of CD Text for JPEG XT lossless and alpha Thomas Richter <thor@math.tu-berlin.de> - 2015-02-06 04:59 +0100
  Re: JPEG announces availablility of CD Text for JPEG XT lossless and alpha BGB <cr88192@hotmail.com> - 2015-02-06 15:52 -0600
    Re: JPEG announces availablility of CD Text for JPEG XT lossless and alpha Thomas Richter <thor@math.tu-berlin.de> - 2015-02-07 10:28 +0100
      Re: JPEG announces availablility of CD Text for JPEG XT lossless and alpha BGB <cr88192@hotmail.com> - 2015-02-07 11:14 -0600
        Re: JPEG announces availablility of CD Text for JPEG XT lossless and alpha Thomas Richter <thor@math.tu-berlin.de> - 2015-02-08 12:54 +0100
          Re: JPEG announces availablility of CD Text for JPEG XT lossless and alpha BGB <cr88192@hotmail.com> - 2015-02-08 08:18 -0600
  Re: JPEG announces availablility of CD Text for JPEG XT lossless and alpha Mark Nelson <snorkelman@gmail.com> - 2015-02-06 14:54 -0800
    Re: JPEG announces availablility of CD Text for JPEG XT lossless and alpha BGB <cr88192@hotmail.com> - 2015-02-06 18:01 -0600
    Re: JPEG announces availablility of CD Text for JPEG XT lossless and alpha Thomas Richter <thor@math.tu-berlin.de> - 2015-02-07 10:24 +0100
  Re: JPEG announces availablility of CD Text for JPEG XT lossless and alpha "Dex" <admin@127.0.0.1> - 2015-02-08 11:36 +0800
    Re: JPEG announces availablility of CD Text for JPEG XT lossless and alpha Thomas Richter <thor@math.tu-berlin.de> - 2015-02-08 06:20 +0100
      Re: JPEG announces availablility of CD Text for JPEG XT lossless and alpha "Dex" <admin@127.0.0.1> - 2015-02-08 15:36 +0800
      Re: JPEG announces availablility of CD Text for JPEG XT lossless and alpha BGB <cr88192@hotmail.com> - 2015-02-08 02:18 -0600
  Re: JPEG announces availablility of CD Text for JPEG XT lossless and alpha Aaron Boxer <boxerab@gmail.com> - 2016-01-26 08:02 -0800
    Re: JPEG announces availablility of CD Text for JPEG XT lossless and alpha Thomas Richter <thor@math.tu-berlin.de> - 2016-01-27 16:04 +0100
      Re: JPEG announces availablility of CD Text for JPEG XT lossless and alpha Aaron Boxer <boxerab@gmail.com> - 2016-01-28 05:02 -0800
      Re: JPEG announces availablility of CD Text for JPEG XT lossless and alpha Aaron Boxer <boxerab@gmail.com> - 2016-01-28 05:02 -0800

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