Skip Frames

OvenMediaEngine Enterprise supports the Skip Frames feature starting with version 0.20.2.2-1

The Skip Frames feature is a frame sampling filter that skips unnecessary frames to reduce processing load and time for tasks that do not require full-frame processing, such as previews, inspecting specific segments of a stream, and lightweight analysis pipelines.

Enabling Skip Frames

You can configure Skip Frames in Server.xml under <OutputProfiles><OutputProfile><Encodes> as follows:

<Server>
    ...
    <OutputProfiles>
        ...
        <OutputProfile>
        ...
            <Encodes>
                <Video>
                    <Name>h264_1080</Name>
                    <Codec>h264</Codec>
                    <Bitrate>7000000</Bitrate>
                    <Width>3840</Width>
                    <Height>2160</Height>
                    <Framerate>60</Framerate>
                    <!--
                    SkipFrames configuration:
                    
                    -1 : Disable frame skipping (no frames are dropped).
                    
                    0 : Enable automatic frame skipping.
                        The number of frames to drop is dynamically calculated
                        based on the current queue state and system load.
                        
                    1 ~ 120 :
                        Enable fixed-ratio frame skipping.
                        Frames are dropped according to the configured value.
                        For example:
                            - 1 : Drop 1 frame out of every 2 frames
                            - 2 : Drop 2 frames out of every 3 frames
                            - N : Drop N frames out of every (N + 1) frames
                            
                        The maximum allowed value is 120.
                    --> 
                    <SkipFrames>1</SkipFrames>
                </Video>     
            </Encodes>
        </OutputProfiles>
        ...
    </OutputProfiles>
    ...
</Server>

Value	Input Range	Description
-1	-1	Disables the Skip Frames feature. Default.
0	0	Enables the Skip Frames feature (Auto). Dynamically adjusts the number of skipped frames based on system load and queue backlog.
N	1~120	Enables the Skip Frames feature with a fixed ratio. Skips frames based on the configured value (N). Fixed ratio: Skips N frames out of every (N+1) input frames, processing the remaining 1 frame. Ex) If set to <SkipFrames>2</SkipFrames>, the system skips 2 out of every 3 input frames.