appsink

Function	Native GStreamer plugin. This plugin is used together with the GetResult and GetResultWithUniqueId APIs to obtain data from streams. The two APIs are available only when the appsink plugin exists in streams.
Constraints	None
Plugin Base Class (Factory)	appsink
Input/Output	Input: buffer Output: external API calling
Property	For details, see Table 1.

**Table 1** appsink plugin properties
Property Name	Description	Mandatory or Not	Modifiable or Not
sync	Synchronization lock, which is used by default.	No	No
max-lateness	Maximum number of nanoseconds that can be delayed before the buffer is discarded. The default value is -1, indicating that there is no limit.	No	No
qos	Whether to generate service quality events from upstream. The default value is no.	No	No
async	Whether to switch from the asynchronous mode to the pause mode. The default value is yes.	No	No
ts-offset	Timestamp offset (in nanoseconds). The default value is 0.	No	No
enable-last-sample	Whether to enable the property of the last sample. The default value is yes.	No	No
last-sample	Read-only property, which is used to check whether the final output result is received.	No	No
blocksize	Size of data obtained by each buffer (in bytes). The default value is 4096.	No	Yes
render-delay	Additional rendering delay (in nanoseconds) for the receiving element. The default value is 0.	No	No
throttle-time	Hold time between rendering buffers. The default value is 0, indicating that the function is disabled.	No	No
max-bitrate	Maximum number of bits to be rendered per second. The default value is 0, indicating that the function is disabled.	No	No
processing-deadline	Maximum processing end time (in nanoseconds). The default value is 20000000.	No	No
caps	Allowed capabilities of the source pad.	No	No
eos	Whether the receiving element is the EOS or is not started. The default value is yes.	No	No
emit-signals	Whether to send a new pre-roll and a new sampling signal. The default value is yes.	No	No
max-buffers	Maximum number of internal buffers. The default value is 0, indicating that there is no limit.	No	No
drop	Whether to discard the old buffer when the queue is filled. The default value is no.	No	No
wait-on-eos	Whether to wait until all buffers are processed after the EOS is received. The default value is yes.	No	No
buffer-list	List of used buffers.	No	No

Parent topic: Output Plugins