diff --git a/CHANGELOG.md b/CHANGELOG.md
index 9e758f0..bec926e 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,12 +5,16 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [1.2.3] - 2023-07-08
+### Changed
+- Add stderr logging in case of exception raised by ffmpeg.
+
 ## [1.2.2] - 2023-07-01
-## Fixed
+### Fixed
 
 - Changed `pytube` src package to quickfix `pytube.exceptions.RegexMatchError` error.
 ## [1.2.1] - 2023-06-23
-## Changed
+### Changed
 
 - Added error handler for `pytube.exceptions.RegexMatchError` error.
 
diff --git a/Dockerfile b/Dockerfile
index f01d5e2..b5712b3 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -35,9 +35,11 @@ CMD ["poetry", "run", "uvicorn", "ytdl_api.asgi:app", "--host", "0.0.0.0", "--po
 
 ############ Test ###################
 FROM dev as test
+WORKDIR /app/
 COPY --from=project-base /app/.venv /app/.venv
+COPY ./tests /app/tests
 RUN poetry install
-CMD ["pytest", "--cov-report", "html"]
+CMD ["poetry", "run", "pytest", "/app/", "--cov", "--cov-report", "html"]
 ############ Prod ###################
 FROM project-base as prod
 RUN poetry install --without dev
diff --git a/docker-compose.yaml b/docker-compose.yaml
index 2c7a01d..b868290 100644
--- a/docker-compose.yaml
+++ b/docker-compose.yaml
@@ -17,3 +17,22 @@ services:
     tty: true
     networks:
       - default
+  ytdl-api-testing:
+    container_name: "ytdl-api-pytest"
+    build: 
+      context: .
+      target: test
+    env_file:
+      - .env
+    volumes:
+      - "./ytdl_api/:/app/ytdl_api"
+    networks:
+      - default
+    deploy:
+      resources:
+        limits:
+          cpus: '0.50'
+          memory: 220M
+        reservations:
+          cpus: '0.25'
+          memory: 20M
diff --git a/pyproject.toml b/pyproject.toml
index 74f13e2..c941f12 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -57,7 +57,7 @@ target-version = "py310"
 
 [tool.poetry]
 name = "ytdl-api"
-version = "1.2.2"
+version = "1.2.3"
 description = "API for web-based youtube-dl client"
 authors = ["Nazar Oleksiuk <nazarii.oleksiuk@gmail.com>"]
 license = "MIT"
diff --git a/ytdl_api/downloaders.py b/ytdl_api/downloaders.py
index 87cabea..36a17a4 100644
--- a/ytdl_api/downloaders.py
+++ b/ytdl_api/downloaders.py
@@ -1,5 +1,6 @@
 import asyncio
 import tempfile
+import logging
 from abc import ABC, abstractmethod
 from functools import partial
 from pathlib import Path
@@ -18,6 +19,8 @@
 from .schemas.responses import VideoInfoResponse
 from .types import VideoURL
 
+logger = logging.getLogger()
+
 
 class IDownloader(ABC):
     """
@@ -143,16 +146,20 @@ def download(
             # Converting to chosen format
             converted_file_path = directory_to_download_to / download.storage_filename
             asyncio.run(self.on_converting_callback(download))
-            out, err = (
-                ffmpeg.concat(
-                    ffmpeg.input(downloaded_streams_file_paths["video"].as_posix()),
-                    ffmpeg.input(downloaded_streams_file_paths["audio"].as_posix()),
-                    a=1,
-                    v=1,
+            try:
+                out, err = (
+                    ffmpeg.concat(
+                        ffmpeg.input(downloaded_streams_file_paths["video"].as_posix()),
+                        ffmpeg.input(downloaded_streams_file_paths["audio"].as_posix()),
+                        a=1,
+                        v=1,
+                    )
+                    .output(converted_file_path.as_posix())
+                    .overwrite_output()
+                    .run(capture_stdout=True, capture_stderr=True)
                 )
-                .output(converted_file_path.as_posix())
-                .overwrite_output()
-                .run(capture_stdout=True, capture_stderr=True)
-            )
+            except ffmpeg.Error as e:
+                logger.exception(e)
+                logger.error(e.stderr)
             # Finshing donwload process
             asyncio.run(self.on_finish_callback(download, converted_file_path))