FFmpeg: update plugin patch for master branch

[guojiansheng0925]

Signed-off-by: Guo Jiansheng jiansheng.guo@intel.com

Description

update FFmpeg plugin patch

Issue

closes #576

Author(s)

@guojiansheng0925

Performance impact

• [ ] quality
• [ ] memory
• [ ] speed
• [ ] 8 bit
• [ ] 10 bit
• [x] N/A

Merge method

• [x] Allow the maintainer to squash and merge when PR is ready to create a 1-commit to the master branch. The maintainer will be able to fix typos / combine commit messages to create a more readable 1-commit message or use whatever is stated in the 'Description' section
• [ ] I will clean up my commits and the maintainer shall use 'rebase and merge' to the master branch

[tianjunwork]

Hi Jiansheng, thank you for the patch. Just to confirm, the plugin patch still applies to all ffmpeg tag 4.2, 4.3 and master? CI doesn't cover all of them.

[guojiansheng0925]

Hi @tianjunwork ，I have applied this patch on n4.2, n4.3 and master. It works well.