I implemented vsync in AccelerantConsumer by using retrace semaphore and made video file producer. Now video plays without tearing and frame skips. Tearing can be globally eliminated when VideoStreams will be integrated with app_server.
Also I implemented variable buffer count in swap chain FIFO. Confirmed to work with 32 buffers in swap chain. I made swap chain more compatible with Vulkan. I plan to make VulkanProducer WSI surface Vulkan API extension so Vulkan can render to any VideoStreams consumer in any address space.