Should I use handler to handle Android streaming camera frames?

Question

Android

Hello!
I am writing a program for real-time text recognition on the Android platform.
Faced such a problem. Using the function onPreviewFrame(byte[] data, Camera camera)of the Camera.PreviewCallback object, I take a frame from the streaming camera. Then I pass it to the handler, where post-processing and recognition take place.
But it turns out that frames are sent too quickly to the handler, the library does not have time to recognize it, a huge queue is built in the hadler, the application either freezes or shows the text recognized 10 seconds earlier.
Tell me, please, is it worth using a handler here and how to make onPreviewFrame wait for the results of the last frame? Thank you very much!