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Raspberry Pi

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    if you're using the stereoscopic support in the firmware you shouldn't be grabbing the images separately - one capture should result in a single image which contains both frames (side by side, or top to bottom depending on how the camera was configured on initialization). If you're having to do two captures then perhaps the UV4L driver doesn't support stereoscopic mode (or it does but you're not configuring it properly) - unfortunately I don't know much about UV4L so I can't help with that. Commented Jul 14, 2016 at 14:45
  • @DaveJones Thank you so much it worked. Can you post your comment as answer so that I could accept it? Commented Aug 11, 2016 at 13:56
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    UV4L supports all the stereoscopic modes: side by side, top/bottom, and as separate captures. As said, it should be enough to enable the side by side mode to avoid the out of sync Commented Aug 14, 2016 at 12:20