Fixing type error.

src/tscut/h264/avc.py

@@ -307,15 +307,15 @@ def get_avc_config_from_h264(input_file: IO[bytes]) -> AVCDecoderConfiguration:
     return avcconfig
 
 # Unused ?
-@typechecked
-def get_codec_private_data_from_h264(input_file: IO[bytes]) -> AVCDecoderConfiguration:
-    avcconfig = get_avc_config_from_h264(input_file)
-    res = dump_codec_private_data(avcconfig)
-
-    return res
+# @typechecked
+# def get_codec_private_data_from_h264(input_file: IO[bytes]) -> AVCDecoderConfiguration:
+#     avcconfig = get_avc_config_from_h264(input_file)
+#     res = dump_codec_private_data(avcconfig)
+# 
+#     return res
 
 @typechecked
-def dump_codec_private_data(avc_decoder_configuration: AVCDecoderConfiguration) -> bytearray:
+def dump_codec_private_data(avc_decoder_configuration: AVCDecoderConfiguration) -> bytearray | None:
     # Rebuild a Matroska Codec Private Element
     res = bytearray()
     # Code private element
@@ -325,6 +325,8 @@ def dump_codec_private_data(avc_decoder_configuration: AVCDecoderConfiguration)
                  len(buf))
 
     embl_length = get_ebml_length(len(buf))
+    if embl_length is None:
+        return None
     logger.debug('EMBL encoded length: %s', hexdump.dump(embl_length, sep=':'))
     res.extend(embl_length)
     res.extend(buf)

src/tscut/matroska/ebml.py

@@ -130,6 +130,8 @@ def change_ebml_element_size(input_file: IO[bytes], position:int, addendum:int)
     if  new_size > max_size:
         # TODO: Test this code ...
         new_encoded_size = get_ebml_length(new_size)
+        if new_encoded_size is None:
+            raise ValueError()
         size_of_new_encoded_size = len(new_encoded_size)
         if size_of_new_encoded_size <= size_of_data_size:
             logger.error('New encoded size is smaller (%d) or equal than previous size (%d).\