GStreamerVulkanWriter

Captures Vulkan framebuffer images and encodes them to an MP4 video file via GStreamer. More...

Public Member Functions
	GStreamerVulkanWriter (VkPhysicalDevice phys, VkDevice dev, VkQueue q, uint32_t queueFamilyIndex, VkCommandPool commandPool, uint32_t w, uint32_t h, VkFormat fmt, const std::string &outFile, uint32_t fpsNumer=30, uint32_t fpsDenom=1)
	Constructs a writer that encodes Vulkan frames to a video file.
void	finish ()
	Signals the end of the video stream to the GStreamer pipeline.
void	pushFrame (VkImage srcImage, VkImageLayout currentLayout, uint64_t frameIndex)
	Copies a Vulkan image to the staging buffer and pushes it as a video frame.

Detailed Description

Captures Vulkan framebuffer images and encodes them to an MP4 video file via GStreamer.

---

Copies each frame from a VkImage into a host-visible staging buffer, then pushes raw pixel data through a GStreamer pipeline (appsrc -> videoconvert -> x264enc -> mp4mux -> filesink).

Definition at line 28 of file GstreamerVulkanWriter.h.

Constructor & Destructor Documentation

GStreamerVulkanWriter()

GStreamerVulkanWriter::GStreamerVulkanWriter ( VkPhysicalDevice phys, VkDevice dev, VkQueue q, uint32_t queueFamilyIndex, VkCommandPool commandPool, uint32_t w, uint32_t h, VkFormat fmt, const std::string & outFile, uint32_t fpsNumer = 30, uint32_t fpsDenom = 1 )

inline

Constructs a writer that encodes Vulkan frames to a video file.

Parameters

[in]	phys	Vulkan physical device handle.
[in]	dev	Vulkan logical device handle.
[in]	q	Vulkan queue for transfer commands.
[in]	queueFamilyIndex	Queue family index for the transfer queue.
[in]	commandPool	Command pool for allocating transfer command buffers.
[in]	w	Frame width in pixels.
[in]	h	Frame height in pixels.
[in]	fmt	Pixel format (must be B8G8R8A8_UNORM or R8G8B8A8_UNORM).
[in]	outFile	Output MP4 file path.
[in]	fpsNumer	Framerate numerator (default 30).
[in]	fpsDenom	Framerate denominator (default 1).

Definition at line 43 of file GstreamerVulkanWriter.h.

Member Function Documentation

pushFrame()

void GStreamerVulkanWriter::pushFrame ( VkImage srcImage, VkImageLayout currentLayout, uint64_t frameIndex )

inline

Copies a Vulkan image to the staging buffer and pushes it as a video frame.

Parameters

[in]	srcImage	The source VkImage to capture.
[in]	currentLayout	The current layout of the source image.
[in]	frameIndex	Zero-based frame index for timestamp calculation.

Definition at line 83 of file GstreamerVulkanWriter.h.

---

The documentation for this class was generated from the following file:

• VulkanVideoStreamer/Headers/GstreamerVulkanWriter.h