To ease working with action cameras

• Converting each video to ipi format then synchronising them and converting to another ipivideo is painful, it takes a while and creates massive files. It would be so much better if it could just decode and linearly transform the mp4 videos directly.

To ease calibration on action cameras

• It is very annoying when the marker jumps from one side of the image to something irrelevant on the other side of the image in a single frame. Would it be possible to set a limit on how many pixels it can jump in a frame? I can't move my hands a 1000 pixels in 1/120th of a second!
• Setting the calibration colour is hard, we've found small changes in colour can be the difference in failing to calibrate or a great calibration. Maybe we could visualise the colour window like opencv https://docs.opencv.org/4.1.0/da/d97/tutorial_threshold_inRange.html?
• As a last resort, I'd like to be able to add/delete/edit/interpolate keys.

Improving actor tracking by improving the actor representation

• Being able to provide/edit the texture map for the actor would be awesome, I'm sure we could get better tracking. I'd start wearing tshirts like this https://www.amazon.com/Bang-Tidy-Clothing-Graphic-Geometric/dp/B01LXOXCA6 it brings ipi a little closer to the cutting edge research https://www.youtube.com/watch?v=nQZpyJjaLAI
• As an extension of that, I'd like to be able to provide my own model for the actor. My shoes are always different and my trousers taper and hang differently!

Miscellaneous

• Windowed/rolling background subtraction would be a nice addition and help working outdoors like cv::BackgroundSubtractorKNN https://opencv-python-tutroals.readthedocs.io/en/latest/py_tutorials/py_video/py_bg_subtraction/py_bg_subtraction.html
• Refining time synchronisation during bundle adjustment would be awesome as well (and possible if playing individual mp4 rather than interleaved into one stream)

really?we do not need all of these ，and waste time ， the lasted version can be good enough

Hello,
thank you for your feedback and hints, we'll take this into consideration.

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iPi Soft