rtpredenc

rtpredenc — RTP Redundant Audio Data (RED) encoder

Properties

gboolean allow-no-red-blocks Read / Write
guint distance Read / Write
gint pt Read / Write
guint sent Read

Types and Values

struct GstRtpRedEnc

Object Hierarchy

    GObject
    ╰── GInitiallyUnowned
        ╰── GstObject
            ╰── GstElement
                ╰── GstRtpRedEnc

Description

Encode Redundant Audio Data (RED) as per RFC 2198.

This element is mostly provided for chrome webrtc compatibility: chrome expects protection packets generated by GstRtpUlpFecEnc to be wrapped in RED packets for backward compatibility purposes, but does not actually make use of the redundant packets that could be encoded with this element.

As such, when used for that purpose, only the “pt” property should be set to a payload type different from both the protected and protection packets' payload types.

When using GstRtpBin, this element should be inserted through the “request-fec-encoder” signal.

See also: GstRtpRedDec, GstWebRTCBin, GstRtpBin

Synopsis

Element Information

plugin

 rtp

author

 Hani Mustafa <hani@pexip.com>, Mikhail Fludkov <misha@pexip.com>

class

 Codec/Payloader/Network/RTP

Element Pads

name

 sink

direction

 sink

presence

 always

details

 application/x-rtp

name

 src

direction

 source

presence

 always

details

 application/x-rtp

Functions

Types and Values

struct GstRtpRedEnc

struct GstRtpRedEnc;

Property Details

The “allow-no-red-blocks” property

  “allow-no-red-blocks”      gboolean

true - can produce RED packets even without redundant blocks (distance==0) false - RED packets will be produced only if distance>0.

Flags: Read / Write

Default value: TRUE

The “distance” property

  “distance”                 guint

Tells which media packet to use as a redundant block (0 - no redundant blocks, 1 to use previous packet, 2 to use the packet before previous, etc.).

Flags: Read / Write

Default value: 0

The “pt” property

  “pt”                       gint

Payload type FEC packets (-1 disable).

Flags: Read / Write

Allowed values: [0,127]

Default value: 0

The “sent” property

  “sent”                     guint

Count of sent packets.

Flags: Read

Default value: 0

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