# rtpdtmfdepay

This element takes RTP DTMF packets and produces sound. It also emits a message on the GstBus.

The message is called "dtmf-event" and has the following fields:

- `type` (G_TYPE_INT, 0-1): Which of the two methods specified in RFC 2833 to use. The value should be 0 for tones and 1 for named events. Tones are specified by their frequencies and events are specified by their number. This element currently only recognizes events. Do not confuse with "method" which specified the output.

- `number` (G_TYPE_INT, 0-16): The event number.

- `volume` (G_TYPE_INT, 0-36): This field describes the power level of the tone, expressed in dBm0 after dropping the sign. Power levels range from 0 to -63 dBm0. The range of valid DTMF is from 0 to -36 dBm0.

- `method` (G_TYPE_INT, 1): This field will always been 1 (ie RTP event) from this element.

## Hierarchy

    GObject
        ╰──GInitiallyUnowned
            ╰──GstObject
                ╰──GstElement
                    ╰──GstRTPBaseDepayload
                        ╰──rtpdtmfdepay

## Factory details

Authors: – Youness Alaoui

Classification: – `Codec/Depayloader/Network/RTP`

Rank – marginal

Plugin – dtmf

Package – GStreamer Good Plug-ins

## Pad Templates

### `sink`

    application/x-rtp:
              media: audio
            payload: [ 96, 127 ]
         clock-rate: [ 0, 2147483647 ]
      encoding-name: TELEPHONE-EVENT

Presence – always

Direction – sink

Object type – GstPad

### `src`

    audio/x-raw:
             format: S16LE
               rate: [ 1, 2147483647 ]
           channels: 1
             layout: interleaved

Presence – always

Direction – src

Object type – GstPad

## Properties

### max-duration

    “max-duration” guint

The maxumimum duration (ms) of the outgoing soundpacket. (0 = no limit)

Flags : Read / Write

Default value : 0

### unit-time

    “unit-time” guint

The smallest unit (ms) the duration must be a multiple of (0 disables it)

Flags : Read / Write

Default value : 0

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