Here are the classes, structs, unions and interfaces with brief descriptions:

[detail level 123]

__gnu_cxx
Gio
DBus
Glib
TypeTraits< bool > >
Container_Helpers
Drive > >
File > >
Mount > >
Volume > >
RefPtr< const T > >
RefPtr< T > >
ustring >
string >
ustring >
map< K, V > >
string >
ustring > >
string > >
vector< T > >
Gst
Enums
AllocationParams
Allocator
AudioBaseSink	The base class for audio sinks
AudioBaseSrc	The base class for audio sources
AudioClock	A Helper object for implementing audio clocks
AudioFilter	A base class for simple audio filters
AudioFormatInfo	Information for an audio format
AudioInfo	Information for an audio format
AudioRingBufferSpec	A class containing the format specification of a Gst::AudioRingBuffer
AudioRingBuffer	A base class for audio audioringbuffer implementations
AudioSink	A simple base class for audio sinks
AudioSrc	A simple base class for audio sources
BaseSink	The base class for sink elements
BaseSrc	A base class for getrange based source elements
BaseTransform	A base class for simple transform filters
Iterator	A class used to retrieve multiple reference counted elements in a thread safe way
Bin	Base class and element that can contain other elements
Buffer	SECTION:gstbuffer : Data-passing buffer type : #GstPad, #GstMiniObject, #GstMemory, #GstMeta, #GstBufferPool
BufferList	A grouped scatter data buffer type for data-passing
Bus	A class that encompasses the GStreamer asynchronous message bus subsystem
Caps	A class that describes sets of media formats
CapsFeatures
ChildProxy	An interface for multi child elements
ClockID	A data type to hold the handle to an outstanding sync or async clock callback
Clock	An abstract class for global clocks
Context
ColorBalance	An interface for adjusting color balance settings
ColorBalanceChannel	A class that represents a color balance channel
Discoverer	Discoverer - Utility for discovering information on URIs
DiscovererInfo	DiscovererInfo - Class containing the information of a URI analyzed by Gst::Discoverer
DiscovererStreamInfo	DiscovererStreamInfo - Base class for information concerning a media stream
DiscovererContainerInfo	DiscovererContainerInfo - Gst::DiscovererStreamInfo specific to container streams
DiscovererAudioInfo	DiscovererAudioInfo - Gst::DiscovererStreamInfo specific to audio streams
DiscovererVideoInfo	DiscovererVideoInfo - Gst::DiscovererStreamInfo specific to video streams (this includes images)
ElementFactory	A class that creates Gst::Element objects from a factory
Element	The abstract base class for all pipeline elements
CoreError	The GStreamer core GError type
LibraryError	The GStreamer library GError type
ResourceError	The GStreamer resource GError type
StreamError	The GStreamer stream GError type
Event	A class that represents events that are passed up and down a pipeline
EventFlushStart	A flush start event
EventFlushStop	A flush stop event
EventEos	An end of stream event
EventNewSegment	A new segment event
EventTag	A tag event
EventBufferSize	A buffer size event
EventQos	A QOS event
EventSeek	A seek event
EventNavigation	A Navigation event
EventLatency	A latency event
EventStep	A step event
EventSinkMessage	A sink-message event
EventStreamStart	A stream-start event
EventCaps
IteratorBasic	A class used to retrieve multiple elements in a thread safe way
FormatDefinition	A class to store the details of a Gst::Format retrieved by Gst::get_format_details()
GhostPad	A class that represents pseudo link pads
IteratorBase	The base class for classes that retrieve multiple elements in a thread safe way
MapInfo
Message	A class that represents lightweight objects to signal the application of pipeline events
MessageEos	An end of stream message
MessageError	An error message
MessageWarning	A warning message
MessageInfo	An informational message
MessageTag	A tag message
MessageBuffering	A buffering message
MessageStateChanged	A state change message
MessageStateDirty	A state dirty message
MessageStepDone	A step done message
MessageClockProvide	A clock provide message
MessageClockLost	A clock lost message
MessageNewClock	A new clock message
MessageApplication	An application message
MessageElement	An element specific message
MessageCustom	A custom message
MessageSegmentStart	A segment start message
MessageSegmentDone	A segment done message
MessageDuration	A duration message
MessageLatency	A latency message
MessageAsyncStart	An asynchronous start message
MessageAsyncDone	An asynchronous done message
MessageStepStart	A step start message
MessageStructureChange	A structure change message
MessageRequestState	A request state message
MessageStreamStatus	A stream status message
Memory	GstMemory is a lightweight refcounted object that wraps a region of memory
QuarkData	This is a base class for data which represents qdata
MiniObject	This is a base class for some gstreamermm objects
Navigation	An interface for elements that provide navigation functionality
Object	A base class for the GStreamer object hierarchy
Pad	A class that represents objects contained by elements that allows links to other elements
PadProbeInfo
PadTemplate	A class that describes the media type of a pad
StaticPadTemplate
ParseError	The different parsing errors that can occur
Parse	A class that gets a pipeline from a text pipeline description
Pipeline	A top-level bin with clocking and bus management functionality
PluginFeature	A base class for anything that can be added to a Gst::Plugin
PluginError	The plugin loading errors
Plugin	A container for features loaded from a shared object module
Preset	A helper interface for element presets
PushSrc	A base class for push based source elements
Query	A class used to perform queries on pads and elements
QueryApplication	A custom application query object
QueryConvert	A convert query object
QueryPosition	A stream position query object
QueryDuration	A stream duration query object
QueryLatency	A latency query object
QuerySeeking	A seeking query object
QueryFormats	A formats query object
QuerySegment	A new segment query object
QueryBuffering	A new buffering query object
QueryCaps	A new caps query object
QueryScheduling	A new scheduling query object
QueryAllocation	A new scheduling query object
QueryUri	A new uri query object
QueryAcceptCaps	A new accept caps query object
Registry	An abstract base class for management of Gst::Plugin objects
Sample	A Gst::Sample is a small object containing data, a type, timing and extra arbitrary information
Segment	A class that describes the configured region of interest in a media file
StreamVolume	An interface for elements that provide a stream volume
Structure	A generic class containing fields of names and values
SystemClock	A default clock that uses the current system time
TagList	A class tha represents a list of tags and values used to describe media metadata
TagSetter	An interface that allows setting and retrieval of media metadata
Task	A class representing GStreamer streaming threads
TaskPool	A class representing a pool of GStreamer streaming threads
Toc
TocEntry
TocSetter
TypeFindFactory	A class used to get information about registered typefind functions
TypeFind	A class used for stream type detection
URIHandler	An interface to ease URI handling in plugins
Fourcc	A class that represents a 4 byte identifier (used in codecs)
Fraction	A class that represents a fraction
IntRange	A class that represents an integer range (min - max)
DoubleRange	A class that represents a double range (min - max)
FractionRange	A class that represents a fractional range
ValueList
VideoOrientation	An interface for elements providing video orientation controls
VideoRectangle	A helper structure for the Gst::VideoSink class representing a rectangular area
VideoSink	A base class for video sinks
VideoOverlay	An interface for setting/getting a Window on elements supporting it
Adder	A Wrapper for the adder plugin
AlsaSink	A Wrapper for the alsasink plugin
AlsaSrc	A Wrapper for the alsasrc plugin
AppSink	A Wrapper for the appsink plugin
AppSrc	A Wrapper for the appsrc plugin
AudioConvert	A Wrapper for the audioconvert plugin
AudioRate	A Wrapper for the audiorate plugin
AudioTestSrc	A Wrapper for the audiotestsrc plugin
CapsFilter	A Wrapper for the capsfilter plugin
CdParanoiaSrc	A Wrapper for the cdparanoiasrc plugin
ClockOverlay	A Wrapper for the clockoverlay plugin
DecodeBin	A Wrapper for the decodebin plugin
FakeSink	A Wrapper for the fakesink plugin
FakeSrc	A Wrapper for the fakesrc plugin
FdSink	A Wrapper for the fdsink plugin
FdSrc	A Wrapper for the fdsrc plugin
FileSink	A Wrapper for the filesink plugin
FileSrc	A Wrapper for the filesrc plugin
Funnel	A Wrapper for the funnel plugin
GioSink	A Wrapper for the giosink plugin
GioSrc	A Wrapper for the giosrc plugin
GioStreamSink	A Wrapper for the giostreamsink plugin
GioStreamSrc	A Wrapper for the giostreamsrc plugin
Identity	A Wrapper for the identity plugin
InputSelector	A Wrapper for the input-selector plugin
MultiQueue	A Wrapper for the multiqueue plugin
OggDemux	A Wrapper for the oggdemux plugin
OggMux	A Wrapper for the oggmux plugin
OutputSelector	A Wrapper for the output-selector plugin
PlayBin	A Wrapper for the playbin plugin
Queue	A Wrapper for the queue plugin
Queue2	A Wrapper for the queue2 plugin
SubtitleOverlay	A Wrapper for the subtitleoverlay plugin
TCPClientSink	A Wrapper for the tcpclientsink plugin
TCPClientSrc	A Wrapper for the tcpclientsrc plugin
TCPServerSrc	A Wrapper for the tcpserversrc plugin
Tee	A Wrapper for the tee plugin
TextOverlay	A Wrapper for the textoverlay plugin
TextRender	A Wrapper for the textrender plugin
TheoraDec	A Wrapper for the theoradec plugin
TheoraEnc	A Wrapper for the theoraenc plugin
TheoraParse	A Wrapper for the theoraparse plugin
TimeOverlay	A Wrapper for the timeoverlay plugin
TypeFindElement	A Wrapper for the typefind plugin
UriDecodeBin	A Wrapper for the uridecodebin plugin
Valve	A Wrapper for the valve plugin
VideoRate	A Wrapper for the videorate plugin
VideoScale	A Wrapper for the videoscale plugin
VideoTestSrc	A Wrapper for the videotestsrc plugin
VorbisDec	A Wrapper for the vorbisdec plugin
VorbisEnc	A Wrapper for the vorbisenc plugin
VorbisParse	A Wrapper for the vorbisparse plugin
VorbisTag	A Wrapper for the vorbistag plugin
XImageSink	A Wrapper for the ximagesink plugin
AtomicQueue	The Gst::AtomicQueue object implements a queue that can be used from multiple threads without performing any blocking operations
Exception
Check
ElementClass
std
tr1
tr2