_sp_passiveVideo - Synchronisation of the movie with the sync square

[oliche]

The proof of concept validates the idea of switching randomly the sync square by chunks N frames to be then recorded on the frame2ttl.

We should now try to regress out the time differences using ibldsp.utils.sync_timestamps with the linear option set to True.

A first glance shows that we have some delayed frames in the playback, so it is suggested to look at possible ways to reduce CPU/GPU load of decoding the frames using different playbacks.

• store movie in AWS accessible to the public
• store flipping sequence in the repository
• write the task that will synchronise the frame2ttl fronts with the pre-generated squence
• look into codecs (video editing experts like @bimac 🥇 )