diff --git a/.github/workflows/codequality.yml b/.github/workflows/codequality.yml
new file mode 100644
index 0000000..f086fe4
--- /dev/null
+++ b/.github/workflows/codequality.yml
@@ -0,0 +1,17 @@
+name: Code quality
+
+on: [push]
+
+jobs:
+
+  runtests:
+    runs-on: ubuntu-latest
+    steps:
+    - name: Install BATS
+      run: |
+        sudo apt-get update
+        sudo apt-get install --yes --no-install-recommends bats
+    - uses: actions/checkout@v3
+    - name: Run BATS tests
+      run: |
+        bats test/test.bats
diff --git a/README.md b/README.md
index e5dd14a..941d26f 100644
--- a/README.md
+++ b/README.md
@@ -6,31 +6,38 @@ Convert binary files to videos, e.g. MP4 or WebM, and back.
 ### binary2video
 
 ```
-binary2video [-f fps] [-w width] [-h height] <infile> <outfile>
+binary2video [-f fps] [-w width] [-h height] [-v] infile outfile
 
--f fps      Set framerate, i.e. frame per second; default 1.
+-f fps      Set framerate, i.e. frames per second; default 1.
 
 -w width    Set width, default 320.
 
 -h height   Set height, default 240.
 
-<infile>    The name and path of the binary file which should be converted into
+-c codec    Set video codec: h.264, vp9, ffv1, or ffv1.3. Default is vp9.
+
+-v          Be verbose.
+
+infile      The name and path of the binary file which should be converted into
             a video.
 
-<outfile>   The name and path of the video file which should be created. The suffix
+outfile     The name and path of the video file which should be created. The suffix
             of the file will determine the video container type. The container must
-            be supported by FFmpeg, for example .mp4, .webm, .avi, etc.
+            be supported by FFmpeg, for example .mp4, .webm, .avi, .mkv, etc. Not
+            all video codecs work with all container formats, though.
 ```
 
 ### video2binary
 
 ```
-video2binary <infile> <outfile>
+video2binary [-v] infile outfile
+
+-v          Be verbose.
 
-<infile>    The name and path of the video file from which the original binary file
+infile      The name and path of the video file from which the original binary file
             should be extracted.
 
-<outfile>   The name and path of the binary file to which the original data should be
+outfile     The name and path of the binary file to which the original data should be
             restored to.
 ```
 ## Internal process
diff --git a/binary2video b/binary2video
index 8d02120..d44c8f5 100755
--- a/binary2video
+++ b/binary2video
@@ -1,7 +1,7 @@
 #!/usr/bin/env bash
 
 usage_and_exit () {
-    echo "Usage: binary2video [-f fps] [-w width] [-h height] <infile> <outfile>"
+    echo "Usage: binary2video [-f fps] [-w width] [-h height] [-c codec] [-v] infile outfile"
     exit $1
 }
 
diff --git a/video2binary b/video2binary
index e1b03a3..5899173 100755
--- a/video2binary
+++ b/video2binary
@@ -1,7 +1,7 @@
 #!/usr/bin/env bash
 
 usage_and_exit () {
-    echo "Usage: video2binary <infile> <outfile>"
+    echo "Usage: video2binary [-v] infile outfile"
     exit $1
 }