GStreamer Core Library

Gst
GstAllocator
GstAtomicQueue
GstBin
GstBuffer
GstBufferList
GstBufferPool
GstBus
GstCaps
GstCapsFeatures
GstSample
GstChildProxy
GstClock
GstConfig
GstContext
GstControlBinding
GstControlSource
GstDateTime
GstElement
GstElementFactory
GstGError
GstEvent
GstFormat
GstGhostPad
GstIterator
GstMemory
GstMessage
GstMeta
GstMiniObject
GstObject
GstPad
GstPadTemplate
GstParamSpec
GstParse
GstPipeline
GstPlugin
GstPluginFeature
GstPoll
GstPreset
GstProtectionMeta
GstQuery
GstRegistry
GstSegment
GstStream
GstStreamCollection
GstStructure
GstSystemClock
GstTagList
GstTagSetter
GstTask
GstTaskPool
GstToc
GstTocSetter
GstTypeFind
GstTypeFindFactory
GstUri
GstUriHandler
GstUtils
GstValue
GstVersion

libgstreamer-1.0.so provides all the core GStreamer services, including initialization, plugin management and types, as well as the object hierarchy that defines elements and bins, along with some more specialized elements.