[8.0ß3] Animated GIFs speed is too high

Flint · Post by *Flint » 2011-09-30, 11:58 UTC

Sample image:
http://www.hlcomic.com/images/82anim.gif
If you open it in web browser, IrfanView or Imagine, the ball bounces with period ~1 sec. In TC 8.0's Lister without plugins the animation is ~5 times faster.

MVV · Post by *MVV » 2011-09-30, 12:03 UTC

It is a matter of taste which speed program should choose. Sample GIF have no delays set for any frame. Try to set frame delays and test it. Test this image, TC shows it with correct speed (for 1s per frame).

Flint · Post by *Flint » 2011-09-30, 12:14 UTC

MVV wrote:It is a matter of taste which speed program should choose. Sample GIF have no delays set for any frame.

Unfortunately, I do not know the GIF format, but I tested it in 6 different programs (Opera, IE, Firefox, IrfanView, Imagine, default Windows viewer) and all they showed it with the same speed. In such situation I tend to think that TC is doing something wrong. Maybe, there is a standard for default delay value? Or not a standard, but just common practice?

Post by *ghisler(Author) » 2011-09-30, 12:15 UTC

Thanks for the image, I can see it too. Maybe GDI+ is reporting wrong values? I will check it.

MVV · Post by *MVV » 2011-09-30, 12:17 UTC

Flint, Imagine plugin has Animation factory tool that allows to see and change delays for frames.

However fast animation allows to see blinking that lack of double-bufferzation causes.

Post by *ghisler(Author) » 2011-09-30, 12:41 UTC

Indeed the delay between frames is stored in the image itself. Lister should actually handle that. I will check why it fails with that specific image.

Post by *petermad » 2011-10-01, 00:22 UTC

2ghisler(Author)

The delay of this specific image is set to 0 - so actually GDI+ is doing correctly. With Imagine plugin you can select to set a minimum delay time for each frame. If that is disabled the gif looks the same with Imagine and GDI+

Flint · Post by *Flint » 2011-10-01, 06:38 UTC

petermad wrote:If that is disabled the gif looks the same with Imagine and GDI+

But not with all other programs…

Post by *petermad » 2011-10-01, 15:10 UTC

Well, QuickTime Player shows it with no frame delay. But I admit, that it is the only program that I could find on my system that does that.

MVV · Post by *MVV » 2011-10-01, 16:12 UTC

I think TC may provide a parameter for minimal gif frame delay.

Post by *ghisler(Author) » 2011-10-02, 15:54 UTC

OK, I will use a minimum of 80 ms, that seems to be used by browsers like Firefox.

MVV · Post by *MVV » 2011-10-02, 18:15 UTC

Christian, INI parameter won't harm anyway. E.g. if there is a gif movie that requires fast frame rate, it will slow it down...

Post by *ghisler(Author) » 2011-10-03, 21:50 UTC

I will consider it.

MVV · Post by *MVV » 2011-10-07, 12:54 UTC

Fixed in b4.
Thanks for GifMinDelay parameter, it works perfectly.

Post by *ghisler(Author) » 2011-10-07, 13:02 UTC

Thanks for confirming the fix! The parameter is not in the help yet because it's experimental.