Function av_opt_get_chlayout

pub unsafe extern "C" fn av_opt_get_chlayout(
    obj: *mut c_void,
    name: *const i8,
    search_flags: i32,
    layout: *mut AVChannelLayout,
) -> i32

@param[out] layout The returned layout is a copy of the actual value and must be freed with av_channel_layout_uninit() by the caller