fixed error in dockerfile and save path

Dockerfile

@@ -6,6 +6,8 @@ COPY requirements.txt .
 
 RUN pip install --no-cache-dir -r requirements.txt
 
+RUN apt-get update && apt-get install -y ffmpeg
+
 ENV MPLCONFIGDIR /tmp/matplotlib
 
 RUN mkdir /app/results_vc

app.py

@@ -125,7 +125,7 @@ def trim_video(input_file, output_format, start_time, end_time):
 def convert_video(input_file, output_format):
     try:
         # Set output file
-        output_folder = f"{os.getcwd()}/results_cv/"
+        output_folder = f"{os.getcwd()}/results_vc/"
         output_file = set_output_file(input_file, output_format, output_folder)
 
         # Convert video