Please update the ffmpeg and gnutls versions used by libopencv

[cameron-a-johnson]

Feature Request

For the latest pip-installed version of opencv-python (4.5.5.62), libopencv is using very dated versions of ffmpeg and gnutls, which are known to have vulnerabilities. Would it be possible to release a version with those dependencies updated?

Please let me know if I'm posting this request to the correct repo.

Issue submission checklist

• [✅ ] This is not a generic OpenCV usage question (looking for help for coding, other usage questions, homework etc.)
• [✅ ] I have read the README of this repository and understand that this repository provides only an automated build toolchain for OpenCV Python packages (there is no actual OpenCV code here)
• [ ✅ ] The issue is related to the build scripts in this repository, to the pre-built binaries or is a feature request (such as "please enable this additional dependency")
• [✅ ] I'm using the latest version of opencv-python

[asmorkalov]

Related issues: #622, #614

[asmorkalov]

OpenCV-Python team works on security-fix release of the package.

[asmorkalov]

Done with releases 4.5.5.64 and 3.4.17.63.

[cameron-a-johnson]

Great, thanks!