Function probe_vulkan_encode 

pub fn probe_vulkan_encode(
    device: &AVHWDeviceContext,
    width: u32,
    height: u32,
) -> Result<VulkanEncodeProbe, EncodeError>

Opens h264_vulkan against device and encodes one untouched pool frame.

Errors

Returns an adapter failure when the encoder is absent, the pool cannot be created, the session cannot open, or no packet is produced.