This function fills info with the GstMapInfo of length merged memory blocks starting at idx in buffer. When length is -1, all memory blocks starting from idx are merged and mapped.

flags describe the desired access of the memory. When flags is GST_MAP_WRITE, buffer should be writable (as returned from Buffer.isWritable).

When buffer is writable but the memory isn't, a writable copy will automatically be created and returned. The readonly copy of the buffer memory will then also be replaced with this writable copy.

The memory in info should be unmapped with Buffer.unmap after usage.

class Buffer


idx uint

an index

length int

a length

info GstMapInfo

info about the mapping

flags GstMapFlags

flags for the mapping

Return Value

Type: bool

TRUE if the map succeeded and info contains valid data.