Android : Loading and unloading ffmpeg jni library based on when is needed

I finally managed to compile ffmpeg for android and I've been able to use it in my app.

Here is the scenario of my app:

• I show the user a gridview with thumbnails of images and videos


• the user can click on a cell and it is taken to image/video details where he can see the full image or play the video


• the user can apply an image over an video and this is when ffmpeg is used

So basically, the user might never actually use the watermarking option or he can do it very rare because the amount of available videos is way smaller than images.

I am loading the ffmpeg library, first time it is needed by running:

static {
     System.loadLibrary("ffmpeglib");
}

Now here are my questions:

1. loading the library like this, uses app's memory and resources ?


2. can I unload the library, or better said, is it needed to unload it ? I have not found any java code like System.unloadLibrary to take care of unloading


3. Since the library might be used rarely, wouldn't a load => do encoding => unload be a better approach ? Or maybe having it loaded would allow easy reuse since no loading is necessary.


4. If I use an IntentService to load the library and make the encoding, when the service completes the job, does the library gets unloaded ?