Thank you for your replies that will surely help other users.
There are two ways to process images in Pix4Dmapper when flying a Solo.
1. Extraction of the log file and import into Pix4Dmapper
Once the flight mission log file is taken from the SD card or extracted using Mission Planner, import it into Pix4Dmapper to define the geolocation of the images (accepted formats are.log/.tlog/.csv/.txt). For more information: https://support.pix4d.com/hc/en-us/articles/205320215
In the first step of processing, Pix4Dmapper tries to align the camera and GPS times but it may fail. After running step 1. Initial Processing, the user should check the image geotags in the Quality Report and verify that they do not accumulate near the takeoff and landing points. Delays could also be visible along the flight tracks. In this case, using Mission Planner to geotag the images is recommended.
2. Image geotagging using Mission Planner
No need to connect Pixhawk to apply this procedure. It only requires the log file in the .csv format that is generated after extracting the log file using Mission Planner. For more information, see Tuffwing website: http://www.tuffwing.com/support/geotag_gopro_images_with_pixhawk_log.html
Note that when flying Solo with Sequoia, the two should connect with a cable that connects the camera to the gimbal of the drone. This cable is not commercialized yet. Here is Parrot’s SQ forum-community page: https://community.parrot.com/t5/Sequoia/bd-p/Sequoia
Pix4Dmapper is a processing software to convert your images into into 3D models, maps and more. To assist our users for the flight plan we have a mobile application that support DJI drones, Parrot Bebop 2 and on Android only, 3DR Solo. This will probably be very interesting to you. You can find more on how to get started here: https://support.pix4d.com/hc/en-us/articles/202557269
Image coordinates are saved in the .p4d file that is generated at the end of the mission, so that you can process in Pix4Dmapper with image geolocation. Note that however, Pix4Dcapture does not write in the image EXIF.
If you want to know more about our general recommendations for the image acquisition plan, please see: