diff --git a/cidre/src/cat/audio/base_types.rs b/cidre/src/cat/audio/base_types.rs
index d0b4a667..f4a46431 100644
--- a/cidre/src/cat/audio/base_types.rs
+++ b/cidre/src/cat/audio/base_types.rs
@@ -9,7 +9,7 @@ use crate::{define_opts, four_cc_to_str, os};
 use crate::ns;
 
 /// These are the error codes returned from the APIs found through Core Audio related frameworks.
-pub mod errors {
+pub mod err {
     use crate::os::Error;
 
     /// Unimplemented core routine.
diff --git a/cidre/src/cf/url.rs b/cidre/src/cf/url.rs
index 059824f7..715a6295 100644
--- a/cidre/src/cf/url.rs
+++ b/cidre/src/cf/url.rs
@@ -75,6 +75,11 @@ impl Url {
         cf::Url::with_fs_path_in(&path, PathStyle::Posix, is_dir, None)
     }
 
+    #[inline]
+    pub fn with_file_path(path: &Path) -> Option<arc::R<Url>> {
+        Self::with_path(path.into(), false)
+    }
+
     /// ```
     /// use cidre::cf;
     ///
diff --git a/cidre/src/cg/image/destination.rs b/cidre/src/cg/image/destination.rs
index a61dc5ad..e26a46e3 100644
--- a/cidre/src/cg/image/destination.rs
+++ b/cidre/src/cg/image/destination.rs
@@ -130,6 +130,12 @@ impl Dst {
         unsafe { CGImageDestinationCreateWithData(data, ty, count, None) }
     }
 
+    /// Creates an image destination that writes image data to the specified URL.
+    ///
+    /// # Arguments:
+    /// * `url` - The URL at which to write the image data. This object overwrites any data at the specified URL.
+    /// * `ty` -  The uniform type identifier of the resulting image file.
+    /// * `count` - The number of images (not including thumbnail images) you want to include in the image file.
     #[doc(alias = "CGImageDestinationCreateWithURL")]
     #[inline]
     pub fn with_url(url: &cf::Url, ty: &cf::String, count: usize) -> Option<arc::R<Self>> {
diff --git a/cidre/src/cm.rs b/cidre/src/cm.rs
index c8298a3e..38480006 100644
--- a/cidre/src/cm.rs
+++ b/cidre/src/cm.rs
@@ -15,7 +15,7 @@ pub use format_description::VideoDimensions;
 pub use format_description::VideoFormatDesc;
 
 mod format_description_bridge;
-pub use format_description_bridge::errors as format_description_bridge_errors;
+pub use format_description_bridge::err as format_desc_bridge_err;
 pub use format_description_bridge::swap_be_image_desc_to_host;
 pub use format_description_bridge::swap_be_sound_desc_to_host;
 pub use format_description_bridge::swap_host_image_desc_to_be;
@@ -35,6 +35,7 @@ pub use time::TimeValue;
 
 pub mod sample_buffer;
 
+pub use sample_buffer::err as sample_buf_err;
 #[cfg(feature = "cat")]
 pub use sample_buffer::BlockBufAudioBufList;
 pub use sample_buffer::Flags as SampleBufFlags;
@@ -46,6 +47,7 @@ pub use attachment::Bearer as AttachBearer;
 pub use attachment::Mode as AttachMode;
 
 pub mod block_buffer;
+pub use block_buffer::err as block_buf_err;
 pub use block_buffer::BlockBuf;
 pub use block_buffer::Flags as BlockBufFlags;
 
diff --git a/cidre/src/cm/block_buffer.rs b/cidre/src/cm/block_buffer.rs
index 2b15f8fd..4047f4a0 100644
--- a/cidre/src/cm/block_buffer.rs
+++ b/cidre/src/cm/block_buffer.rs
@@ -357,7 +357,7 @@ extern "C-unwind" {
 
 }
 
-pub mod errors {
+pub mod err {
     use crate::os::Error;
 
     /// Returned when a cm::BlockBuffer-creating API gets a failure
diff --git a/cidre/src/cm/format_description_bridge.rs b/cidre/src/cm/format_description_bridge.rs
index da645b44..2968340e 100644
--- a/cidre/src/cm/format_description_bridge.rs
+++ b/cidre/src/cm/format_description_bridge.rs
@@ -1,6 +1,6 @@
 use crate::{arc, cf, cm, define_cf_type, os};
 
-pub mod errors {
+pub mod err {
     use crate::os::Error;
 
     /// Invalid parameter.
diff --git a/cidre/src/cm/sample_buffer.rs b/cidre/src/cm/sample_buffer.rs
index e5fb812a..3b5223ec 100644
--- a/cidre/src/cm/sample_buffer.rs
+++ b/cidre/src/cm/sample_buffer.rs
@@ -377,7 +377,7 @@ impl SampleBuf {
                     true
                 } else {
                     let dict = &arr[0];
-                    match dict.get(attachment_keys::not_sync()) {
+                    match dict.get(attach_keys::not_sync()) {
                         None => true,
                         Some(not_sync) => unsafe {
                             // in theory we don't need check actual value here.
@@ -395,7 +395,7 @@ impl SampleBuf {
     #[inline]
     pub unsafe fn contains_not_sync(&self) -> bool {
         let arr = self.attaches(true).unwrap_unchecked();
-        arr[0].contains_key(attachment_keys::not_sync())
+        arr[0].contains_key(attach_keys::not_sync())
     }
 
     /// Returns a value that indicates whether a sample buffer is valid.
@@ -649,7 +649,7 @@ extern "C-unwind" {
 }
 
 /// Use attachements()
-pub mod attachment_keys {
+pub mod attach_keys {
     use crate::cf;
 
     /// cf::Boolean (absence of this key implies Sync)
@@ -743,7 +743,7 @@ pub mod attachment_keys {
 }
 
 /// use get_attachment or dictionary_of_attachments
-pub mod buffer_attachment_keys {
+pub mod buf_attach_keys {
     use crate::cf;
 
     /// cf::Boolean
@@ -946,7 +946,7 @@ pub mod buffer_attachment_keys {
     }
 }
 
-pub mod errors {
+pub mod err {
     use crate::os::Error;
 
     /// An allocation failed.
@@ -1022,3 +1022,33 @@ pub mod errors {
     #[doc(alias = "kCMSampleBufferError_DataCanceled")]
     pub const DATA_CANCELED: Error = Error::new_unchecked(-16751);
 }
+
+#[cfg(test)]
+mod tests {
+    use crate::{cf, cm, cv};
+
+    #[test]
+    fn basics() {
+        let image_buf = cv::ImageBuf::new(1920, 1080, cv::PixelFormat::_32_BGRA, None).unwrap();
+        let format_desc = cm::FormatDesc::with_image_buf(&image_buf).unwrap();
+        let timing_info = cm::SampleTimingInfo::invalid();
+        let mut sample_buf = cm::SampleBuf::with_image_buf(
+            &image_buf,
+            true,
+            None,
+            std::ptr::null(),
+            &format_desc,
+            &timing_info,
+        )
+        .unwrap();
+        assert!(sample_buf.data_is_ready());
+
+        let attaches = sample_buf.attaches_mut(true).unwrap();
+        attaches[0].insert(
+            cm::sample_buffer::attach_keys::do_not_display(),
+            cf::Number::tagged_i8(1).into(),
+        );
+
+        assert!(sample_buf.is_key_frame());
+    }
+}
diff --git a/cidre/src/mtk/texture_loader.rs b/cidre/src/mtk/texture_loader.rs
index 4791b995..34eb731c 100644
--- a/cidre/src/mtk/texture_loader.rs
+++ b/cidre/src/mtk/texture_loader.rs
@@ -161,6 +161,10 @@ impl TextureLoader {
         Self::alloc().init_with_device(device)
     }
 
+    pub fn with_sys_default_device() -> Option<arc::R<Self>> {
+        Some(Self::alloc().init_with_device(mtl::Device::sys_default().as_ref()?))
+    }
+
     #[cfg(feature = "blocks")]
     #[objc::msg_send(newTextureWithContentsOfURL:options:completionHandler:)]
     pub fn new_texture_with_url_ch(
diff --git a/cidre/src/os.rs b/cidre/src/os.rs
index fd3650a3..2e87ae67 100644
--- a/cidre/src/os.rs
+++ b/cidre/src/os.rs
@@ -76,6 +76,7 @@ impl std::error::Error for Error {}
 
 pub type Result<Ok = ()> = std::result::Result<Ok, Error>;
 
+#[inline]
 pub(crate) unsafe fn result_unchecked<T, R>(op: impl FnOnce(&mut Option<T>) -> R) -> Result<T>
 where
     R: Into<Result>,
@@ -85,6 +86,7 @@ where
     Ok(unsafe { option.unwrap_unchecked() })
 }
 
+#[inline]
 pub(crate) fn result_init<T, R>(op: impl FnOnce(*mut T) -> R) -> Result<T>
 where
     R: Into<Result>,
diff --git a/cidre/src/vn.rs b/cidre/src/vn.rs
index cae4e610..323f6806 100644
--- a/cidre/src/vn.rs
+++ b/cidre/src/vn.rs
@@ -64,6 +64,7 @@ pub use face_landmarks::Region as FaceLandmarkRegion;
 pub use face_landmarks::Region2d as FaceLandmarkRegion2d;
 
 mod generate_foreground_instance_mask_request;
+pub use generate_foreground_instance_mask_request::GenForegroundInstanceMaskRequest;
 
 mod generate_person_segmentation_request;
 pub use generate_person_segmentation_request::GenPersonSegmentationRequest;