Anim Player with audio. - Page 2

Retro1234 · 29 May 2023, 20:05

Is this the same thing?
[ Show youtube player ]

Minuous · 30 May 2023, 10:02

Quote:

Originally Posted by sovenyimre

There is no data about the FPS inside IFF anim files!... Am I right?...

No, it's at offset 14 in each ANHD chunk. See https://wiki.amigaos.net/wiki/ANIM_IFF_CEL_Animations

As it is specified in integer 1/60ths of a second, it is actually impossible to have an IFF ANIM that plays smoothly at 25 FPS.

Cobe · 30 May 2023, 11:48

Interesting!
So your tool does its "pre-compression" so to call it and outputs regulars iffs that could be played in some other iff player?
Am i getting this right?
And when you say your player plays compressed iff anims, is it just regular rle decoding being done on the fly or something more?

sovenyimre · 30 May 2023, 23:12

Retro1234!
Yes. That is the same.

Minuous!
Thank You. I didn't take this into account... but I will.
I think I can still switch to ntsc to get the 30 fps timing with the integer and the extra 5 frames will not contain data in the anim file to process?! It means that i have to skip every 5 frames and I am right where I want to be?
Actually, I didn't want to display animations (with changing fps and palette, etc...), but movie-like things, so I didn't take into account anything in the file header. It wasn't necessary, because it's AMOS basic with simple commands. The program just pushes the image out and that's it. When I start to complicate it, of course it can slow down...for example, now I'm want the changeable palette, since the amos command doesn't handle it by default and it is a slowdown if I check for (CMAP) palette changes. At least ....worth a try.

Cobe!
I don't use any extra compression, only what is supported by the basic ANIM format (Delta), I just make it easier for the builder by preparing (manipulating) the original image sequences. So it can be played with other animplayers as well.
So it is not more, than a normal if anim, I just filter out the changes in advance and this reduces its size considerably and the machine can read it faster.
This Reduced thing was not presented in the YouTube video because I thought it up afterwards. I wanted to be faster. The reduced version of the video in the presentation is almost fluid 25fps on my A1200+8MB without an accelerator card, in case the sound is played from Ram.
I know that it is not CDXL in quality, but i think the file size is more friendly.

Cobe · 06 June 2023, 13:20

Thanks for the explanation.
Hope one day I'll find time to compare it with cdxl on real unexpanded cd32. The lower quality wouldnt boterh me to much if the fps and resolution is better.

pandy71 · 07 June 2023, 23:47

Quote:

Originally Posted by Minuous

No, it's at offset 14 in each ANHD chunk. See https://wiki.amigaos.net/wiki/ANIM_IFF_CEL_Animations

As it is specified in integer 1/60ths of a second, it is actually impossible to have an IFF ANIM that plays smoothly at 25 FPS.

It is specified in jiffies and it is field rate (so it should be not 1/60 but 1001/60000 for US), for PAL it can be 1/50 so you can have proper 25 fps.
Also you can have VFR video and as granularity is limited by video output then 25 fps is possible.

Minuous · 08 June 2023, 09:01

1 jiffy = 1/60 second, as stated multiple times in the official format specification.

30 May 2023, 23:12	#24
sovenyimre Registered User Join Date: Jul 2020 Location: Hungary Posts: 85	Retro1234! Yes. That is the same. Minuous! Thank You. I didn't take this into account... but I will. I think I can still switch to ntsc to get the 30 fps timing with the integer and the extra 5 frames will not contain data in the anim file to process?! It means that i have to skip every 5 frames and I am right where I want to be? Actually, I didn't want to display animations (with changing fps and palette, etc...), but movie-like things, so I didn't take into account anything in the file header. It wasn't necessary, because it's AMOS basic with simple commands. The program just pushes the image out and that's it. When I start to complicate it, of course it can slow down...for example, now I'm want the changeable palette, since the amos command doesn't handle it by default and it is a slowdown if I check for (CMAP) palette changes. At least ....worth a try. Cobe! I don't use any extra compression, only what is supported by the basic ANIM format (Delta), I just make it easier for the builder by preparing (manipulating) the original image sequences. So it can be played with other animplayers as well. So it is not more, than a normal if anim, I just filter out the changes in advance and this reduces its size considerably and the machine can read it faster. This Reduced thing was not presented in the YouTube video because I thought it up afterwards. I wanted to be faster. The reduced version of the video in the presentation is almost fluid 25fps on my A1200+8MB without an accelerator card, in case the sound is played from Ram. I know that it is not CDXL in quality, but i think the file size is more friendly. Last edited by sovenyimre; 31 May 2023 at 11:16.

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29 May 2023, 20:05	#21
Retro1234 Cuthbert The Movie Join Date: Jun 2006 Location: 5150 Posts: 5,461	Is this the same thing? [ Show youtube player ]

30 May 2023, 11:48	#23
Cobe Registered User Join Date: Jan 2014 Location: Belgrade / Serbia Age: 40 Posts: 986	Interesting! So your tool does its "pre-compression" so to call it and outputs regulars iffs that could be played in some other iff player? Am i getting this right? And when you say your player plays compressed iff anims, is it just regular rle decoding being done on the fly or something more?

06 June 2023, 13:20	#25
Cobe Registered User Join Date: Jan 2014 Location: Belgrade / Serbia Age: 40 Posts: 986	Thanks for the explanation. Hope one day I'll find time to compare it with cdxl on real unexpanded cd32. The lower quality wouldnt boterh me to much if the fps and resolution is better.

08 June 2023, 09:01	#27
Minuous Coder/webmaster/gamer Join Date: Oct 2001 Location: Canberra/Australia Posts: 2,486	1 jiffy = 1/60 second, as stated multiple times in the official format specification.

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