diff --git a/tiddl/cli/app.py b/tiddl/cli/app.py
index 96dd70f..603637d 100644
--- a/tiddl/cli/app.py
+++ b/tiddl/cli/app.py
@@ -6,6 +6,7 @@ from typing_extensions import Annotated
 from tiddl.cli.config import APP_PATH, CONFIG
 from tiddl.cli.ctx import ContextObject, Context
 from tiddl.cli.commands import register_commands
+from tiddl.core.utils.ffmpeg import is_ffmpeg_installed as ifs
 
 log = logging.getLogger("tiddl")
 
@@ -38,6 +39,9 @@ def callback(
 
     log.debug(f"{ctx.params=}")
 
+    is_ffmpeg_installed = ifs()
+    log.debug(f"{is_ffmpeg_installed=}")
+
     if DEBUG:
         debug_path = APP_PATH / "api_debug"
     else:
@@ -46,3 +50,9 @@ def callback(
     ctx.obj = ContextObject(
         api_omit_cache=OMIT_CACHE, console=Console(), debug_path=debug_path
     )
+
+    if not is_ffmpeg_installed:
+        ctx.obj.console.print(
+            "[yellow]WARNING ffmpeg is not installed, tiddl might not work properly, "
+            + "[link=https://github.com/oskvr37/tiddl/blob/main/README.md#installation]read README.md[/]"
+        )
diff --git a/tiddl/core/utils/ffmpeg.py b/tiddl/core/utils/ffmpeg.py
index 4794326..2155c21 100644
--- a/tiddl/core/utils/ffmpeg.py
+++ b/tiddl/core/utils/ffmpeg.py
@@ -8,6 +8,8 @@ def run(cmd: list[str]):
 
 
 def is_ffmpeg_installed() -> bool:
+    """Checks if `ffmpeg` is installed."""
+
     try:
         run(["ffmpeg", "-version"])
         return True