Images cannot be imported

The import module from AliceVision has problems parsing corrupted image files. Some mobile phone cameras and small cameras like the CGO3+ from Yuneec produce images which are not valid. Most image viewers and editing software can handle minor inconsistencies. Use tools like Bad Peggy to check for errors in your image files. e.g. "...extraneous bytes before marker 0xdb". To fix this problem, you need to bulk convert your dataset (this is why downscaling worked too). You can use IrfranView File->Batch Conversion or Imagemagick. Make sure you set the quality to 100%. Now you can add the images to Meshroom (assuming the camera is in the sensor db). Maybe the Meshroom image importer will be more tolerant with corrupted files in the future.