# h264seiinserter

Extracts SEI-related metas from buffer and inserts SEI messages. Supports closed caption (GstVideoCaptionMeta) and unregistered user data (GstVideoSEIUserDataUnregisteredMeta) SEI messages.

## Example launch line

    gst-launch-1.0.exe filesrc location=video.mp4 ! parsebin name=p ! h264parse ! \
      queue ! cccombiner name=c ! \
      h264seiinserter remove-caption-meta=true caption-meta-order=display ! \
      h264parse ! avdec_h264 ! videoconvert ! cea608overlay ! queue ! autovideosink \
      filesrc location=caption.mcc ! mccparse ! ccconverter ! \
      closedcaption/x-cea-708,format=(string)cc_data ! queue ! c.caption

Above pipeline inserts closed caption data to already encoded H.264 stream and renders. Because mccparse outputs caption data in display order, "caption-meta-order=display" property is required in this example.

## Hierarchy

    GObject
        ╰──GInitiallyUnowned
            ╰──GstObject
                ╰──GstElement
                    ╰──GstCodecSEIInserter
                        ╰──GstH264CCInserter
                            ╰──h264seiinserter

## Factory details

Authors: – Seungha Yang

Classification: – `Codec/Video/Filter`

Rank – none

Plugin – closedcaption

Package – GStreamer Bad Plug-ins

## Pad Templates

### `sink`

    video/x-h264:
          alignment: au

Presence – always

Direction – sink

Object type – GstPad

### `src`

    video/x-h264:
          alignment: au

Presence – always

Direction – src

Object type – GstPad

## Properties

### remove-sei-unregistered-meta

    “remove-sei-unregistered-meta” gboolean

Remove GstVideoSEIUserDataUnregisteredMeta from outgoing video buffers.

Flags : Read / Write

Default value : false

Since : 1.30

### sei-types

    “sei-types” GstCodecSEIInsertType *

Which SEI message types to insert.

Flags : Read / Write

Default value : unregistered+cc

Since : 1.30

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