GstEventType

#GstEventType lists the standard event types that can be sent in a pipeline.

The custom event types can be used for private messages between elements that can't be expressed using normal GStreamer buffer passing semantics. Custom events carry an arbitrary #GstStructure. Specific custom events are distinguished by the name of the structure.

Values

ValueMeaning
UNKNOWN0

unknown event.

FLUSH_START2563

Start a flush operation. This event clears all data from the pipeline and unblock all streaming threads.

FLUSH_STOP5127

Stop a flush operation. This event resets the running-time of the pipeline.

STREAM_START10254

Event to mark the start of a new stream. Sent before any other serialized event and only sent at the start of a new stream, not after flushing seeks.

CAPS12814

#GstCaps event. Notify the pad of a new media type.

SEGMENT17934

A new media segment follows in the dataflow. The segment events contains information for clipping buffers and converting buffer timestamps to running-time and stream-time.

STREAM_COLLECTION19230

A new #GstStreamCollection is available (Since 1.10)

TAG20510

A new set of metadata tags has been found in the stream.

BUFFERSIZE23054

Notification of buffering requirements. Currently not used yet.

SINK_MESSAGE25630

An event that sinks turn into a message. Used to send messages that should be emitted in sync with rendering.

STREAM_GROUP_DONE26894

Indicates that there is no more data for the stream group ID in the message. Sent before EOS in some instances and should be handled mostly the same. (Since 1.10)

EOS28174

End-Of-Stream. No more data is to be expected to follow without either a STREAM_START event, or a FLUSH_STOP and a SEGMENT event.

TOC30750

An event which indicates that a new table of contents (TOC) was found or updated.

PROTECTION33310

An event which indicates that new or updated encryption information has been found in the stream.

SEGMENT_DONE38406

Marks the end of a segment playback.

GAP40966

Marks a gap in the datastream.

QOS48641

A quality message. Used to indicate to upstream elements that the downstream elements should adjust their processing rate.

SEEK51201

A request for a new playback position and rate.

LATENCY56321

Notification of new latency adjustment. Sinks will use the latency information to adjust their synchronisation.

STEP58881

A request for stepping through the media. Sinks will usually execute the step operation.

RECONFIGURE61441

A request for upstream renegotiating caps and reconfiguring.

TOC_SELECT64001

A request for a new playback position based on TOC entry's UID.

SELECT_STREAMS66561

A request to select one or more streams (Since 1.10)

CUSTOM_UPSTREAM69121

Upstream custom event

CUSTOM_DOWNSTREAM71686

Downstream custom event that travels in the data flow.

CUSTOM_DOWNSTREAM_OOB74242

Custom out-of-band downstream event.

CUSTOM_DOWNSTREAM_STICKY76830

Custom sticky downstream event.

CUSTOM_BOTH79367

Custom upstream or downstream event. In-band when travelling downstream.

CUSTOM_BOTH_OOB81923

Custom upstream or downstream out-of-band event.

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