Element
Basic Concepts
2.1 Element
An element is the basic functional unit of a pipeline. Elements generally fall into the following categories:
| Category | Common Elements | Purpose |
|---|---|---|
| Source | filesrc, v4l2src, videotestsrc, rtspsrc | Generate or read media data |
| Demuxer | qtdemux, matroskademux, tsdemux | Separate audio, video, and subtitles from a container |
| Depayloader | rtph264depay, rtph265depay | Extract an encoded stream from RTP packets |
| Parser | h264parse, h265parse, jpegparse | Parse and normalize an encoded stream |
| Decoder | decodebin or a specific software/hardware decoder | Decode compressed data into raw audio or video |
| Encoder | A specific software/hardware encoder | Encode raw audio or video into a compressed stream |
| Filter | videoconvert, videoscale, videoflip | Convert formats, scale, rotate, or otherwise process data |
| Sink | autovideosink, waylandsink, filesink, fakesink | Display, save, or discard data |
Use the following commands to inspect the elements available on the current system:
gst-inspect-1.0
gst-inspect-1.0 v4l2src
gst-inspect-1.0 h264parse