pub fn type_find_helper_for_buffer_with_extension<P: IsA<Object>>(
    obj: Option<&P>,
    buf: &BufferRef,
    extension: Option<&str>,
) -> Result<(Caps, TypeFindProbability), BoolError>
Expand description

Tries to find what type of data is contained in the given gst::Buffer, the assumption being that the buffer represents the beginning of the stream or file.

All available typefinders will be called on the data in order of rank. If a typefinding function returns a probability of gst::TypeFindProbability::Maximum, typefinding is stopped immediately and the found caps will be returned right away. Otherwise, all available typefind functions will the tried, and the caps with the highest probability will be returned, or None if the content of the buffer could not be identified.

When extension is not None, this function will first try the typefind functions for the given extension, which might speed up the typefinding in many cases.

Free-function: gst_caps_unref


object doing the typefinding, or None (used for logging)


a gst::Buffer with data to typefind


extension of the media, or None


the gst::Caps corresponding to the data, or None if no type could be found. The caller should free the caps returned with gst_caps_unref().


location to store the probability of the found caps, or None