diff --git a/fluster/decoder.py b/fluster/decoder.py
index a8785c3c..4eb27c5e 100644
--- a/fluster/decoder.py
+++ b/fluster/decoder.py
@@ -18,7 +18,7 @@
 from abc import ABC, abstractmethod
 from functools import lru_cache
 from shutil import which
-from typing import List, Optional, Type
+from typing import Any, Dict, List, Optional, Type
 
 from fluster.codec import Codec, OutputFormat
 from fluster.utils import normalize_binary_cmd
@@ -47,6 +47,7 @@ def decode(
         timeout: int,
         verbose: bool,
         keep_files: bool,
+        optional_params: Optional[Dict[str, Any]] = None,
     ) -> str:
         """Decodes input_filepath in output_filepath"""
         raise Exception("Not implemented")
diff --git a/fluster/decoders/av1_aom.py b/fluster/decoders/av1_aom.py
index a867904a..480b714a 100644
--- a/fluster/decoders/av1_aom.py
+++ b/fluster/decoders/av1_aom.py
@@ -14,6 +14,7 @@
 #
 # You should have received a copy of the GNU Lesser General Public
 # License along with this library. If not, see <https://www.gnu.org/licenses/>.
+from typing import Any, Dict, Optional
 
 from fluster.codec import Codec, OutputFormat
 from fluster.decoder import Decoder, register_decoder
@@ -38,6 +39,7 @@ def decode(
         timeout: int,
         verbose: bool,
         keep_files: bool,
+        optional_params: Optional[Dict[str, Any]] = None,
     ) -> str:
         """Decodes input_filepath in output_filepath"""
         fmt = "--rawvideo"
diff --git a/fluster/decoders/av1_dav1d.py b/fluster/decoders/av1_dav1d.py
index 526cc5e5..e70f50dd 100644
--- a/fluster/decoders/av1_dav1d.py
+++ b/fluster/decoders/av1_dav1d.py
@@ -14,6 +14,7 @@
 #
 # You should have received a copy of the GNU Lesser General Public
 # License along with this library. If not, see <https://www.gnu.org/licenses/>.
+from typing import Any, Dict, Optional
 
 from fluster.codec import Codec, OutputFormat
 from fluster.decoder import Decoder, register_decoder
@@ -37,6 +38,7 @@ def decode(
         timeout: int,
         verbose: bool,
         keep_files: bool,
+        optional_params: Optional[Dict[str, Any]] = None,
     ) -> str:
         """Decodes input_filepath in output_filepath"""
         fmt = "yuv"
diff --git a/fluster/decoders/chromium.py b/fluster/decoders/chromium.py
index 04ff48e8..d5f05ad0 100644
--- a/fluster/decoders/chromium.py
+++ b/fluster/decoders/chromium.py
@@ -16,6 +16,7 @@
 # License along with this library. If not, see <https://www.gnu.org/licenses/>.
 
 from functools import lru_cache
+from typing import Any, Dict, Optional
 
 from fluster.codec import Codec, OutputFormat
 from fluster.decoder import Decoder, register_decoder
@@ -50,6 +51,7 @@ def decode(
         timeout: int,
         verbose: bool,
         keep_files: bool,
+        optional_params: Optional[Dict[str, Any]] = None,
     ) -> str:
         return str(main(input_filepath))
 
diff --git a/fluster/decoders/cros_codecs.py b/fluster/decoders/cros_codecs.py
index 718e5437..6f96779d 100644
--- a/fluster/decoders/cros_codecs.py
+++ b/fluster/decoders/cros_codecs.py
@@ -14,6 +14,7 @@
 #
 # You should have received a copy of the GNU Lesser General Public
 # License along with this library. If not, see <https://www.gnu.org/licenses/>.
+from typing import Any, Dict, Optional
 
 from fluster.codec import Codec, OutputFormat
 from fluster.decoder import Decoder, register_decoder
@@ -38,6 +39,7 @@ def decode(
         timeout: int,
         verbose: bool,
         keep_files: bool,
+        optional_params: Optional[Dict[str, Any]] = None,
     ) -> str:
         """Decodes input_filepath in output_filepath"""
 
diff --git a/fluster/decoders/dummy.py b/fluster/decoders/dummy.py
index 0fb8eb57..9659e1eb 100644
--- a/fluster/decoders/dummy.py
+++ b/fluster/decoders/dummy.py
@@ -14,6 +14,7 @@
 #
 # You should have received a copy of the GNU Lesser General Public
 # License along with this library. If not, see <https://www.gnu.org/licenses/>.
+from typing import Any, Dict, Optional
 
 from fluster.codec import Codec, OutputFormat
 from fluster.decoder import Decoder, register_decoder
@@ -36,5 +37,6 @@ def decode(
         timeout: int,
         verbose: bool,
         keep_files: bool,
+        optional_params: Optional[Dict[str, Any]] = None,
     ) -> str:
         return file_checksum(input_filepath)
diff --git a/fluster/decoders/ffmpeg.py b/fluster/decoders/ffmpeg.py
index 1e6f9c28..f6724bdf 100644
--- a/fluster/decoders/ffmpeg.py
+++ b/fluster/decoders/ffmpeg.py
@@ -19,7 +19,7 @@
 import re
 import subprocess
 from functools import lru_cache
-from typing import Dict, Optional, Tuple
+from typing import Any, Dict, Optional, Tuple
 
 from fluster.codec import Codec, OutputFormat
 from fluster.decoder import Decoder, register_decoder
@@ -70,6 +70,7 @@ def decode(
         timeout: int,
         verbose: bool,
         keep_files: bool,
+        optional_params: Optional[Dict[str, Any]] = None,
     ) -> str:
         """Decodes input_filepath in output_filepath"""
         command = [self.binary, "-hide_banner", "-nostdin"]
@@ -99,6 +100,11 @@ def decode(
         elif self.ffmpeg_codec:
             command.extend(["-codec", self.ffmpeg_codec])
 
+        # Optional decoder parameters
+        if optional_params:
+            for key, value in optional_params.items():
+                command.extend([key, str(value)])
+
         # Input file
         command.extend(["-i", input_filepath])
 
diff --git a/fluster/decoders/gstreamer.py b/fluster/decoders/gstreamer.py
index 7a61f91f..793ad19f 100644
--- a/fluster/decoders/gstreamer.py
+++ b/fluster/decoders/gstreamer.py
@@ -21,7 +21,7 @@
 import shlex
 import subprocess
 from functools import lru_cache
-from typing import List, Optional
+from typing import Any, Dict, List, Optional
 
 from fluster.codec import Codec, OutputFormat
 from fluster.decoder import Decoder, register_decoder
@@ -109,14 +109,21 @@ def gen_pipeline(
         input_filepath: str,
         output_filepath: Optional[str],
         output_format: OutputFormat,
+        optional_params: Optional[Dict[str, Any]] = None,
     ) -> str:
         """Generate the GStreamer pipeline used to decode the test vector"""
         output = f"location={output_filepath}" if output_filepath else ""
+
+        decoder_params = ""
+        if optional_params:
+            for key, value in optional_params.items():
+                decoder_params += f" {key}={value} "
+
         return PIPELINE_TPL.format(
             self.cmd,
             input_filepath,
             self.parser if self.parser else "parsebin",
-            self.decoder_bin,
+            self.decoder_bin + decoder_params,
             self.caps,
             self.sink,
             output,
@@ -149,6 +156,7 @@ def decode(
         timeout: int,
         verbose: bool,
         keep_files: bool,
+        optional_params: Optional[Dict[str, Any]] = None,
     ) -> str:
         """Decode the test vector and do the checksum"""
         # When using videocodectestsink we can avoid writing files to disk
@@ -162,7 +170,7 @@ def decode(
             data = run_command_with_output(command, timeout=timeout, verbose=verbose).splitlines()
             return self.parse_videocodectestsink_md5sum(data)
 
-        pipeline = self.gen_pipeline(input_filepath, output_filepath, output_format)
+        pipeline = self.gen_pipeline(input_filepath, output_filepath, output_format, optional_params)
         run_command(shlex.split(pipeline), timeout=timeout, verbose=verbose)
         return file_checksum(output_filepath)
 
@@ -193,6 +201,7 @@ def gen_pipeline(
         input_filepath: str,
         output_filepath: Optional[str],
         output_format: OutputFormat,
+        optional_params: Optional[Dict[str, Any]] = None,
     ) -> str:
         raw_caps = "video/x-raw"
         try:
@@ -785,6 +794,7 @@ def gen_pipeline(
         input_filepath: str,
         output_filepath: Optional[str],
         output_format: OutputFormat,
+        optional_params: Optional[Dict[str, Any]] = None,
     ) -> str:
         caps = f"{self.caps} ! videoconvert dither=none ! video/x-raw,format={output_format_to_gst(output_format)}"
         output = f"location={output_filepath}" if output_filepath else ""
diff --git a/fluster/decoders/h264_jct_vt.py b/fluster/decoders/h264_jct_vt.py
index c2720f2e..1f35a398 100644
--- a/fluster/decoders/h264_jct_vt.py
+++ b/fluster/decoders/h264_jct_vt.py
@@ -15,6 +15,7 @@
 #
 # You should have received a copy of the GNU Lesser General Public
 # License along with this library. If not, see <https://www.gnu.org/licenses/>.
+from typing import Any, Dict, Optional
 
 from fluster.codec import Codec, OutputFormat
 from fluster.decoder import Decoder, register_decoder
@@ -38,6 +39,7 @@ def decode(
         timeout: int,
         verbose: bool,
         keep_files: bool,
+        optional_params: Optional[Dict[str, Any]] = None,
     ) -> str:
         """Decodes input_filepath in output_filepath"""
         run_command(
diff --git a/fluster/decoders/h265_jct_vt.py b/fluster/decoders/h265_jct_vt.py
index 4e9b1702..c70909d9 100644
--- a/fluster/decoders/h265_jct_vt.py
+++ b/fluster/decoders/h265_jct_vt.py
@@ -15,6 +15,7 @@
 #
 # You should have received a copy of the GNU Lesser General Public
 # License along with this library. If not, see <https://www.gnu.org/licenses/>.
+from typing import Any, Dict, Optional
 
 from fluster.codec import Codec, OutputFormat
 from fluster.decoder import Decoder, register_decoder
@@ -38,6 +39,7 @@ def decode(
         timeout: int,
         verbose: bool,
         keep_files: bool,
+        optional_params: Optional[Dict[str, Any]] = None,
     ) -> str:
         """Decodes input_filepath in output_filepath"""
         run_command(
diff --git a/fluster/decoders/h266_vvc_vtm.py b/fluster/decoders/h266_vvc_vtm.py
index c7d183e1..9865792f 100644
--- a/fluster/decoders/h266_vvc_vtm.py
+++ b/fluster/decoders/h266_vvc_vtm.py
@@ -14,6 +14,7 @@
 #
 # You should have received a copy of the GNU Lesser General Public
 # License along with this library. If not, see <https://www.gnu.org/licenses/>.
+from typing import Any, Dict, Optional
 
 from fluster.codec import Codec, OutputFormat
 from fluster.decoder import Decoder, register_decoder
@@ -37,6 +38,7 @@ def decode(
         timeout: int,
         verbose: bool,
         keep_files: bool,
+        optional_params: Optional[Dict[str, Any]] = None,
     ) -> str:
         """Decodes input_filepath in output_filepath"""
         # pylint: disable=unused-argument
diff --git a/fluster/decoders/h266_vvdec.py b/fluster/decoders/h266_vvdec.py
index cd53c90e..64e86aba 100644
--- a/fluster/decoders/h266_vvdec.py
+++ b/fluster/decoders/h266_vvdec.py
@@ -14,6 +14,7 @@
 #
 # You should have received a copy of the GNU Lesser General Public
 # License along with this library. If not, see <https://www.gnu.org/licenses/>.
+from typing import Any, Dict, Optional
 
 from fluster.codec import Codec, OutputFormat
 from fluster.decoder import Decoder, register_decoder
@@ -37,6 +38,7 @@ def decode(
         timeout: int,
         verbose: bool,
         keep_files: bool,
+        optional_params: Optional[Dict[str, Any]] = None,
     ) -> str:
         """Decodes input_filepath in output_filepath"""
         run_command(
diff --git a/fluster/decoders/iso_mpeg2_aac.py b/fluster/decoders/iso_mpeg2_aac.py
index 0c2ee5ee..61da3aa5 100644
--- a/fluster/decoders/iso_mpeg2_aac.py
+++ b/fluster/decoders/iso_mpeg2_aac.py
@@ -16,6 +16,7 @@
 # License along with this library. If not, see <https://www.gnu.org/licenses/>.
 import glob
 import os
+from typing import Any, Dict, Optional
 
 from fluster.codec import Codec, OutputFormat
 from fluster.decoder import Decoder, register_decoder
@@ -40,6 +41,7 @@ def decode(
         timeout: int,
         verbose: bool,
         keep_files: bool,
+        optional_params: Optional[Dict[str, Any]] = None,
     ) -> str:
         """Decodes input_filepath in output_filepath"""
         # Addition of .pcm as extension is a must. If it is something else, e.g. ".out" the decoder will output a
diff --git a/fluster/decoders/iso_mpeg2_video.py b/fluster/decoders/iso_mpeg2_video.py
index c0001644..4c2a2aaf 100644
--- a/fluster/decoders/iso_mpeg2_video.py
+++ b/fluster/decoders/iso_mpeg2_video.py
@@ -17,6 +17,7 @@
 import glob
 import os
 import tempfile
+from typing import Any, Dict, Optional
 
 from fluster.codec import Codec, OutputFormat
 from fluster.decoder import Decoder, register_decoder
@@ -41,6 +42,7 @@ def decode(
         timeout: int,
         verbose: bool,
         keep_files: bool,
+        optional_params: Optional[Dict[str, Any]] = None,
     ) -> str:
         """Decodes input_filepath in output_filepath"""
         with tempfile.TemporaryDirectory() as temp_dir:
diff --git a/fluster/decoders/iso_mpeg4_aac.py b/fluster/decoders/iso_mpeg4_aac.py
index c402a837..dd39e115 100644
--- a/fluster/decoders/iso_mpeg4_aac.py
+++ b/fluster/decoders/iso_mpeg4_aac.py
@@ -16,6 +16,7 @@
 # License along with this library. If not, see <https://www.gnu.org/licenses/>.
 
 import glob
+from typing import Any, Dict, Optional
 
 from fluster.codec import Codec, OutputFormat
 from fluster.decoder import Decoder, register_decoder
@@ -40,6 +41,7 @@ def decode(
         timeout: int,
         verbose: bool,
         keep_files: bool,
+        optional_params: Optional[Dict[str, Any]] = None,
     ) -> str:
         """Decodes input_filepath in output_filepath"""
         # Addition of .pcm as extension is a must. If it is something else, e.g. ".out" the decoder will output a
diff --git a/fluster/decoders/iso_mpeg4_aac_er.py b/fluster/decoders/iso_mpeg4_aac_er.py
index 280bbdda..b7c948a8 100644
--- a/fluster/decoders/iso_mpeg4_aac_er.py
+++ b/fluster/decoders/iso_mpeg4_aac_er.py
@@ -16,6 +16,7 @@
 # License along with this library. If not, see <https://www.gnu.org/licenses/>.
 
 import glob
+from typing import Any, Dict, Optional
 
 from fluster.codec import Codec, OutputFormat
 from fluster.decoder import Decoder, register_decoder
@@ -40,6 +41,7 @@ def decode(
         timeout: int,
         verbose: bool,
         keep_files: bool,
+        optional_params: Optional[Dict[str, Any]] = None,
     ) -> str:
         """Decodes input_filepath in output_filepath"""
         output_filepath += ".raw"
diff --git a/fluster/decoders/iso_mpeg4_video.py b/fluster/decoders/iso_mpeg4_video.py
index a91b7e96..fdeee0d6 100644
--- a/fluster/decoders/iso_mpeg4_video.py
+++ b/fluster/decoders/iso_mpeg4_video.py
@@ -16,7 +16,7 @@
 # License along with this library. If not, see <https://www.gnu.org/licenses/>.
 import os
 import subprocess
-from typing import Tuple
+from typing import Any, Dict, Optional, Tuple
 
 from fluster.codec import Codec, OutputFormat
 from fluster.decoder import Decoder, register_decoder
@@ -41,6 +41,7 @@ def decode(
         timeout: int,
         verbose: bool,
         keep_files: bool,
+        optional_params: Optional[Dict[str, Any]] = None,
     ) -> str:
         """Decodes input_filepath to output_filepath"""
         width, height = self._get_video_resolution(input_filepath, verbose)
diff --git a/fluster/decoders/libvpx.py b/fluster/decoders/libvpx.py
index 1a390455..eca6cccd 100644
--- a/fluster/decoders/libvpx.py
+++ b/fluster/decoders/libvpx.py
@@ -15,6 +15,7 @@
 #
 # You should have received a copy of the GNU Lesser General Public
 # License along with this library. If not, see <https://www.gnu.org/licenses/>.
+from typing import Any, Dict, Optional
 
 from fluster.codec import Codec, OutputFormat
 from fluster.decoder import Decoder, register_decoder
@@ -42,6 +43,7 @@ def decode(
         timeout: int,
         verbose: bool,
         keep_files: bool,
+        optional_params: Optional[Dict[str, Any]] = None,
     ) -> str:
         """Decodes input_filepath in output_filepath"""
         fmt = None
diff --git a/fluster/decoders/vk_video_decoder.py b/fluster/decoders/vk_video_decoder.py
index 0ead4ee7..e700ce98 100644
--- a/fluster/decoders/vk_video_decoder.py
+++ b/fluster/decoders/vk_video_decoder.py
@@ -14,6 +14,7 @@
 #
 # You should have received a copy of the GNU Lesser General Public
 # License along with this library. If not, see <https://www.gnu.org/licenses/>.
+from typing import Any, Dict, Optional
 
 from fluster.codec import Codec, OutputFormat
 from fluster.decoder import Decoder, register_decoder
@@ -38,6 +39,7 @@ def decode(
         timeout: int,
         verbose: bool,
         keep_files: bool,
+        optional_params: Optional[Dict[str, Any]] = None,
     ) -> str:
         """Decodes input_filepath in output_filepath"""
         codec_mapping = {
diff --git a/fluster/test.py b/fluster/test.py
index b068fefc..aa3c39eb 100644
--- a/fluster/test.py
+++ b/fluster/test.py
@@ -86,6 +86,7 @@ def _execute_decode(self) -> str:
             self.timeout,
             self.verbose,
             keep_files_for_decode,
+            self.test_vector.optional_params,
         )
 
     def _cleanup_if_needed(self) -> None:
diff --git a/fluster/test_vector.py b/fluster/test_vector.py
index d4436cd9..676bd92d 100644
--- a/fluster/test_vector.py
+++ b/fluster/test_vector.py
@@ -44,6 +44,7 @@ def __init__(
         output_format: OutputFormat,
         result: str,
         profile: Optional[Profile] = None,
+        optional_params: Optional[Dict[str, Any]] = None,
     ):
         # JSON members
         self.name = name
@@ -51,6 +52,7 @@ def __init__(
         self.source_checksum = source_checksum
         self.input_file = input_file
         self.profile = profile
+        self.optional_params = optional_params
         self.output_format = output_format
         self.result = result
 
@@ -84,6 +86,11 @@ def data_to_serialize(self) -> Dict[str, object]:
             data["profile"] = str(self.profile.value)
         else:
             data.pop("profile")
+        if self.optional_params is not None:
+            data["optional_params"] = self.optional_params
+        else:
+            data.pop("optional_params")
+
         return data
 
     def __str__(self) -> str:
@@ -92,6 +99,7 @@ def __str__(self) -> str:
             f"            Source: {self.source}\n"
             f"            Input: {self.input_file}\n"
             f"            Profile: {self.profile}\n"
+            f"            Options: {self.optional_params}\n"
             f"            Result: {self.result}"
         )
         return ret