How to correct angle in images from android app before upload?

I have a 50 sequences made in Android device without compass. How to mass change angle before upload?
May be strip all mapillary data from JPG file, but leave location and datetime?

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Hi trolleway,

You can try to use the Mapillary plugin in JOSM. It has functionality to achieve this. You can also improve the positions, then upload them directly from JOSM.

It’s rather time consuming though.