Are there any command line tools to add a nadir to my .360 videos saved by the Max? Since I am on Linux, GoPro Player is out of reach. I would want the output ideally to be a .360 video so that I can directly upload it to Mapillary instead of again processing the frames myself.
Hi ph4ni! Hope you read this post about my question about the nadir, just wanted to say that. for the gopro on linux, i dunno how to help. maybe other people will help you 
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I’ve tried GitHub - trek-view/gopro2frames: Converts GoPro .mp4 (any GoPro) or .360 (MAX only) files into single frames with correct metadata. Supports 360 and non-360 videos. (after a lot of fixes) but noticed that the size reduces from ~4MB to ~500kb per image after adding the nadir
Please keep in mind that advertising is generally prohibited by the Terms of Use. Equally is adding any artifacts that could choke or break the Mapillary processing pipeline. Hence, my recommendation would be to refrain from adding any stylized nadir or logo to images, except for maybe a pure black or uniform Gaussian blur nadir if you want to conceal the photographer or vehicle below the camera. Apart from this, every time you add or modify any image content you run the risk of worsening image quality if you make a mistake in your post processing, especially with JPEG images and AVC/HEVC videos. In fact, you can easily do more harm than good, despite having best intentions. Feel free to experiment but be cautious about the quality of your results.
See, this may indicate a loss in quality.
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There is a slim line between Advertising and Attribution. I think it should be fine to let creators of the imagery decide on how they want their nadir to look like as long as they dont cause too much damage. After all, they are the ones spending money and efforts voluntarily and publishing everything under CC BY SA on Mapillary. Trekview does this and several others as well. Either way, I’ve avoided all the processing headache by simply adding a printed circle below the camera to both conceal the photographer and promote open data for the better. See example image. On compression, Mapillary brings it down to ~200KB but works!
So, pen, paper, and scissors it is. Nice analog solution.
There is a slim line between Advertising and Attribution. I think it should be fine to let creators of the imagery decide on how they want their nadir to look like as long as they dont cause too much damage. After all, they are the ones spending money and efforts voluntarily and publishing everything under CC BY SA on Mapillary.
I do get your reasoning and it is indeed legitimate to some extent. However, the core issue is that Mapillary could be made liable for linking to, referencing, or promoting illegal content in some jurisdictions. In order to be safe, Mapillary would need to continuously monitor these contributor links or references for their legality, which of course is infeasible. Search engines face basically the same issue but it is their daily job and business to make the distinction between legal and illegal content.
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