Frame Buffer
Buffers h264 frames and creates and sends a video to Luxonis Hub.Make sure to use the
add_frame() method on every h264 frame.Python
1import depthai as dai
2import robothub as rh
3
4frame_buffer: rh.FrameBuffer = FrameBuffer(maxlen=rh.CONFIGURATION["fps"] * 60 * 2)
5
6def process_h264(h264_frame: dai.ImgFrame) -> None:
7 frame_buffer.add_frame(packet=h264_frame)
8 if important_condition() is True:
9 frame_buffer.save_video_event(before_seconds=60,
10 after_seconds=60,
11 title="Interesting video",
12 fps=rh.CONFIGURATION["fps"],
13 frame_width=1920,
14 frame_height=1080)class
robothub.frame_buffer.FrameBuffer
method
__init__(self, maxlen: int = None)A buffer for storing frames. :param maxlen: The maximum number of frames to store in the buffer. If None, the buffer will be unbounded.
method
save_video_event(self, before_seconds: int, after_seconds: int, title: str, fps: int, frame_width: int, frame_height: int, on_complete: Optional
[
Callable
] = None, delete_after_complete: bool = False) -> threading.Thread: threading.ThreadSaves a video event to the frame buffer, then calls `on_complete` when the video is ready. When the video is ready, the `on_complete` function will be called with the path to the video file. Note: When app is stopped, it is not guaranteed that the video will be saved. :param before_seconds: Number of seconds to save before the event occurred. :param after_seconds: Number of seconds to save after the event occurred. :param title: Title of the video event. :param fps: The FPS of the video. :param frame_width: Video frame width. :param frame_height: Video frame height. :param on_complete: Callback function to call when the video is ready. Path to the video file will be passed as the first argument. :param delete_after_complete: If True, delete the video file after the callback function is called. Default: False. :return: The 'threading.Thread' where the video is processed.
method
add_frame(self, packet: Union
[
FramePacket
,
dai.ImgFrame
])Default callback for the frame buffer. It will append the packet to the buffer and put it in all temporary queues.
property