@sturkmen72 Is the PR ready for merge?

@asmorkalov if you have time to release 4.11 please let me check again this PR until tomorrow.

i did not test it with different gif files yet.

about last commit : i corrected durations according the following info from ChatGPT
2. Delay Time Field
The Delay Time is stored in two bytes within the GCE block.
It represents the delay in hundredths of a second (1 unit = 10 milliseconds).
For example:
A delay value of 0x0064 means 100 (decimal), which equals 1 second.
A delay value of 0x000A means 10 (decimal), which equals 0.1 second.

OK. thank you for your great support. i think the PR can be merged. Happy new year for All.

just remember OCV_OPTION(WITH_IMGCODEC_GIF "Include GIF support" ON for test purpose.

Let get the following in order first:

• Fix flaky Imgcodecs_APNG.imwriteanimation_bgcolor #26704 to fix the flaky test
• Fix leaks in cv::PngDecoder #26701 to fix the leaks and the compose_frame API

@asmorkalov I rebased commits and force-pushed changes.

LGTM