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(SVideoWriter): computes video framerate

Julien WAECHTER requested to merge 32-sframewriter-framerate-is-hardcoded-to-30-fps into dev

What does this MR do?

  • Removes the default framerate value hardcoded to 30 fps in SVideoWriter
  • Computes framerate using the timestamps of the first frames in the timeline

How to test it?

  • Build & run ExVideoRecorder sample
  • Select and play a webcam (or file or stream)
  • 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
  • Video was recorded with the same framerate as the video timeline

Some results

  • video captured using a 640x480 15fps webcam
before after
nok ok

Associated issue

Closes #32 (closed)

Edited by Julien WAECHTER

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