SFrameVideo framerate is hardcoded to 30 fps

Summary

SFrameVideo sets the frame rate to 30 and as far as I can see I think we don't record frames fast enough. Indeed the recorded video is well set at 30fps but the play looks much faster with webcams. With a video file it seems to work.

Steps to reproduce

• Launch ExVideoRecorder sample.
• Select a webcam
• Click on the Video Recording button
• Select one of the extension .avi and enter a valid path
• Wait few seconds and stop the recording.
• Open the written file with your preferred video player

What is the current bug behavior?

The replayed video is faster than it should, yet the framerate is ok.

What is the expected correct behavior?

The framerate should be ok, and the video should not look accelerated.

Dev environment

• OS: Linux
• Commit: fw4spl 13.1