ReferenceTimestampMeta#

Added in version 1.14.

class ReferenceTimestampMeta(*args, **kwargs)#

ReferenceTimestampMeta can be used to attach alternative timestamps and possibly durations to a Buffer. These are generally not according to the pipeline clock and could be e.g. the NTP timestamp when the media was captured.

The reference is stored as a Caps in reference. Examples of valid references would be

  • timestamp/x-drivername-stream: for timestamps that are locally

    generated by some driver named drivername when generating the stream, e.g. based on a frame counter

  • timestamp/x-ntp, host=pool.ntp.org, port=123: for timestamps based on a

    specific NTP server. Note that the host/port parameters might not always be given.

  • timestamp/x-ptp, version=IEEE1588-2008, domain=1: for timestamps based

    on a given PTP clock.

  • timestamp/x-unix: for timestamps based on the UNIX epoch according to

    the local clock.

Since 1.24 it can be serialized using serialize() and deserialize().

Methods#

class ReferenceTimestampMeta
classmethod get_info() → MetaInfo#

Gets the global MetaInfo describing the ReferenceTimestampMeta meta.

Added in version 1.14.

Fields#

class ReferenceTimestampMeta
duration#

Duration, or CLOCK_TIME_NONE

parent#

The parent Meta structure

reference#

Identifier for the timestamp reference.

timestamp#

Timestamp