- FFmpeg 3.4.8 (no changes)

* Prefix global javascript functions with sub-namespaces

* js: handle 'namespace_prefix_override', update filtering

- avoid functions override with same name but different namespace
Co-authored-by: NAlexander Alekhin <alexander.a.alekhin@gmail.com>

* improve compatibility for qt 6.

* cmake(highgui): rework Qt dependency support

* cmake(highgui): workaround Qt5Config.cmake "components" bug
Co-authored-by: NAlexander Alekhin <alexander.a.alekhin@gmail.com>

Use the return value of gst_init_check instead of testing the error pointer

Automatically sets the correct OpenCV version in the CMAKE example contained in the build.gradle
file of the Android SDK.

  * sharp Gaussian kernel causes over flow and ends up in blank image

* Add RowVec_8u32f

* Fix build errors in Linux x64 Debug and armeabi-v7a

* Reformat code to make it more clean and conventional

* Optimise with vx_load_expand_q()

This submission is used to improve the performance of the inpaint algorithm for 3 channels images(RGB or BGR).

Reason:
The original algorithm implementation did not consider the cache hits.
The loop of channels is outside the core loop, so the perfmance is not very good.
Moving the channel loop inside the core loop can significantly improve cache hits, thereby improving performance.

Performance:
360P, about >= 30% improvement
iphone8P: 5.52ms -> 3.75ms
iphone6s: 14.04ms -> 9.15ms

Merge pull request #19554 from amirtu:OCV-215_cvtColorTwoPlane_wrong_output_when_Y_Plane_Mat_has_step

different paddings in cvtColorTwoPlane() for biplane YUV420

* Different paddings support in cvtColorTwoPlane() for biplane YUV420

* Build fix for dispatch case.

* Resoted old behaviour for y.step==uv.step to exclude perf regressions.
Co-authored-by: Namir.tulegenov <amir.tulegenov@xperience.ai>
Co-authored-by: NAlexander Smorkalov <alexander.smorkalov@xperience.ai>