Hello,
thanks for the reply, i am using Version 1.8.1 build 13915 (64 bit)
I did some testing myself in the meantime.
As it seems right now it is not 100% consistent (one time the zip-file was fine but i still got the same error from metashape). Most of the time the zip-file seems "corrupt" and would not unzip correctly.
unzip point_cloud.zip
Archive: point_cloud.zip
extracting: tracks.ply
points0.ply: mismatching "local" filename (p0.ply),
continuing with "central" filename version
extracting: points0.ply
file #3: bad zipfile offset (local header sig): 3295365
file #4: bad zipfile offset (local header sig): 3582151
file #5: bad zipfile offset (local header sig): 3962441
file #6: bad zipfile offset (local header sig): 4345579
file #7: bad zipfile offset (local header sig): 4734349
file #8: bad zipfile offset (local header sig): 5123327
file #9: bad zipfile offset (local header sig): 5509905
file #10: bad zipfile offset (local header sig): 5896419
file #11: bad zipfile offset (local header sig): 6286917
file #12: bad zipfile offset (local header sig): 6684119
file #13: bad zipfile offset (local header sig): 6997049
file #14: bad zipfile offset (local header sig): 7323020
file #15: bad zipfile offset (local header sig): 7725119
file #16: bad zipfile offset (local header sig): 8112450
file #17: bad zipfile offset (local header sig): 8491589
file #18: bad zipfile offset (local header sig): 8872104
file #19: bad zipfile offset (local header sig): 9254475
file #20: bad zipfile offset (local header sig): 9639902
file #21: bad zipfile offset (local header sig): 10032145
file #22: bad zipfile offset (local header sig): 10429364
file #23: bad zipfile offset (local header sig): 10734983
file #24: bad zipfile offset (local header sig): 11040810
file #25: bad zipfile offset (local header sig): 11440029
extracting: p23.ply
extracting: p24.ply
extracting: p25.ply
extracting: p26.ply
extracting: p27.ply
extracting: p28.ply
extracting: p29.ply
extracting: doc.xml
Using tar on the other hand works just fine so there seems to be a problem with using unzip.
Processing the project localy on the EC2 instance, copying in to S3 and reopening and also unzipping the .zip-files works fine. My theorys are that perhaps that s3fs is somehow blocking the file during the upload process and metashape cant acces it in the meantime or it has to do with the "multipart" upload from s3fs which divides bigger uploads in multiple smaller parts to store it on S3.
I will try your ideas and will come back to this later.