Since 1.14.3A Gst.Object that will be passed as first argument to func
the parent of obj or null
A generic GstBase.TypeFindHelperGetRangeFunction that will be used to access data at random offsets when doing the typefinding
The length in bytes
extension of the media, or null
the last %GstFlowReturn from pulling a buffer or Gst.FlowReturn.OK if typefinding was successful.
Utility function to do pull-based typefinding. Unlike
gst_type_find_helper()however, this function will use the specified functionfuncto obtain the data needed by the typefind functions, rather than operating on a given source pad. This is useful mostly for elements like tag demuxers which strip off data at the beginning and/or end of a file and want to typefind the stripped data stream before adding their own source pad (the specified callback can then call the upstream peer pad with offsets adjusted for the tag size, for example).When
extensionis notnull, this function will first try the typefind functions for the given extension, which might speed up the typefinding in many cases.