gopro video sent by whatsapp become slow motion
I used to download video from gopro hero 4 silver to mobile phone through the gopro app, and share it with my friends through whatsapp smoothly. However, recently, not knowing why, the gopro video sent by whatsapp would be changed to slow motion, and the length of the video would become double the original length because of the slow motion. I tried to uninstall both whatsapp and gopro app, but the problem still can't be fixed. Anyone knows why and how to fix the problem? Thanks.