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APNG File Format
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(11-18-2025, 04:38 PM)Petr Wrote: @ahenry3068
Thanks for the link. Which version of QB64PE were the programs written in? They are not compatible with QB64PE 4.0.0 and compilation crashes. Anyway, it's a nice code assembly.
I didn't dig into the codes but I was interested in the mention in X16_VIDEO_SPEC.10.F.pdf that video frames in 8 bits are followed by a 512 byte palette? Is this the case for Sprite mode?

It is also the case for the Sprite mode.

This Video format was specifically designed to just be a direct fast memory dump to the X16's VERA Video adapter.   I actually had to play some tricks to play it back on the Desktop Smile...        I'm going to have an update soon.   It's actually mostly done but I'm waiting for the next Commander X16 ROM update as some of the new stuff is slated to upcoming ROM features on the X16.      

There is ONE feature I threw in for the QB64PE side of the house.    It's deliberately obfuscated because it's a little contrary to the Spirit of the app which is
to make Vids playable on the X16.  


Start MakeX16Movie at a command prompt using the option "--NOLIMITS"   (Caps required !, Double dash required !)    The feature is now enabled but still kind of Hidden !      Chose STANDARD Bitmap mode  (NOT HIDEF SECTOR ALIGNED).      Chose Custom Resolution.     Now X16 bandwidth limits are IGNORED.  The program will crank out Higher resolution and frame rate videos  (still no 24 bit color though !)      Use caution,  These Videos ARE NOT COMPRESSED and file size can balloon rapidly !

(11-18-2025, 04:38 PM)Petr Wrote: @ahenry3068
Thanks for the link. Which version of QB64PE were the programs written in? They are not compatible with QB64PE 4.0.0 and compilation crashes. Anyway, it's a nice code assembly.
I didn't dig into the codes but I was interested in the mention in X16_VIDEO_SPEC.10.F.pdf that video frames in 8 bits are followed by a 512 byte palette? Is this the case for Sprite mode?


  **BTW**    I actually started this with 3.9 qb64pe but I'm currently using the 4.2 compiler !.    This program has been over a year in development !
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Messages In This Thread
APNG File Format - by Petr - 11-17-2025, 07:11 PM
RE: APNG File Format - by ahenry3068 - 11-17-2025, 11:18 PM
RE: APNG File Format - by Petr - 11-18-2025, 04:38 PM
RE: APNG File Format - by ahenry3068 - 11-18-2025, 05:44 PM
RE: APNG File Format - by Petr - 11-18-2025, 04:57 PM
RE: APNG File Format - by ahenry3068 - 11-20-2025, 02:32 PM

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