appsrc

Function	Native GStreamer plugin. This plugin is used together with the SendData and SendDataWithUniqueId APIs to send data to the stream. appsrc sends data to the downstream element. The preceding two APIs are valid only when the appsrc plugin exists in the stream.
Constraints	None
Plugin Base Class (Factory)	appsrc
Input/Output	Input: external API calling Output: buffer (data type: MxpiBuffer)
Property	For details, see Table 1.

**Table 1** appsrc plugin properties
Property Name	Description	Mandatory or Not	Modifiable or Not
blocksize	Size of data read from each buffer (in bytes). The default value is 4096.	No	Yes
num-buffers	Number of buffers to be output before the end of stream (EOS) is sent. The default value is -1, indicating that there is no limit.	No	No
typefind	Running type search before negotiation. This property is not recommended because it is not a function.	No	No
do-timestamp	Whether to apply the current time stream to the buffer. The default value is no.	No	No
caps	Allowed capabilities of the source pad.	No	No
size	Size of the data stream (in bytes). If the size is unknown, the value is -1.	No	No
stream-type	Stream type. The default value is Stream.	No	No
max-bytes	Maximum number of bytes in an internal queue. The default value is 200000. 0 indicates that the number of bytes is not limited.	No	No
format	Segment event and seek format. By default, the seek is performed by byte.	No	No
block	Whether to push blocks to buffer when the maximum number of bytes is queued. The default value is no.	No	No
is-live	Whether the source is a live source. By default, it is not a live source.	No	No
min-latency	Minimum delay. The default value is -1.	No	No
max-latency	Maximum delay. The default value is -1, indicating that there is no limit.	No	No
emit-signals	Whether to send the required data. If the data is sufficient, search for the data signal. The default value is yes.	No	No
min-percent	Whether to send required data when the number of bytes in the queue is less than the percentage of the maximum number of bytes. By default, the data is sent.	No	No
current-level-bytes	Number of bytes in the current queue. The default value is 0.	No	No
duration	Duration of a data stream, in nanoseconds. The default value is 18446744073709551615.	No	No

Parent topic: Input Plugins