Feature request: Add Vulkan-based deinterlace filter(s) to FFmpeg project

[Dennis E. Mungai]

This is a feature request to add and enable Vulkan-based deinterlacing filters in ffmpeg.

Some hardware-accelerated encoder implementations and their wrappers, such as NVENC on Turing and newer generation GPUs only support progressive encoding, which *will* implicitly break encoding workflows with *some* sources when a Vulkan-based filter pipeline is in use without a corresponding deinterlacer. Auto-inserting the yadif deinterlacer as a work-around to this could be sub-optimal (for performance reasons).

The lack of a Vulkan-based deinterlacer would also break such Vulkan-based video encoding scenarios (when implemented) on such hardware.

[Elon Musk]

Havent this been fixed?

[Dennis E. Mungai]

No.There's no Vulkan-specific deinterlacer implementation in FFmpeg (yet).