Mdat not found

[cc-ens]

Hello,
Thank you for this tool.
I have got a big .DAT file and a small .mp4 file (my camera was shut off while recording).
I tried recovery via your tool and a working .MP4 from the same camera (using the .DAT as broken file).
Unfortunately, I get the error "Mdat not found" and only the first second of the video appears in file_fixed.mp4.
Any idea of what I could try to get the whole video (4GB)?
Thanks