Try this useful app for free to silence the default camera app.
There are no restrictions on the number of times or forcing you to watch ads.

Since it uses the default camera app, you can use the original in high quality without worrying about any degradation in quality.
Not only that, but other apps that you don't want to hear can be silenced through this app.

-My cute baby was hard to sleep, but if you have ever woke up because of the camera sound, try using it.
-It's so cute, but if you just take a picture, take a quiet picture of a puppy who is surprised by the sound of the picture.
-If you've ever been surprised by the sound of your camera in a quiet place, try it.

** caution :
Never use this app for illegal purposes without the knowledge of others.