Andriod Studio OpenCV 3.2, Cannot open video file or android camera with native OpenCV

Question

I\'m currently working on Android native image processing with camera/video.

I\'m using OpenCV 3.2 to capture and process image.
The problem is that I cannot

Answer 1

This format "mp4" you can't see the VideoCapture with Android. You need to make two conversions:

1. From mp4 to mjpeg. : Example: ffmpeg -i input.mp4 -vcodec mjpeg output.mjpeg
2. From mjpeg to avi: Example: ffmpeg -i output.mjpeg -vcodec output.avi

As you can see in: http://answers.opencv.org/question/126732/loading-video-files-using-videocapture-in-android/

This is an example: https://github.com/WritingMinds/ffmpeg-android-java.