4GB files size limit with Sony HDR-PJ710V camcorder

Hi,

USB ID 054c:05f7 Sony Corp. HDR-PJ710V

It has a USB storage mode, and PTP mode. USB storage isn't useful since video files are split in 4GB chunks, whereas PTP mode on Windows, give the complete file.

This unit works properly with Windows 10.  I tried upgrading to Ubuntu Jammy 22.04 - libgphoto2 2.5.27, which states there is some added > 4GB file size support, but it  still shows truncated file size:

$ gphoto2 -L -f /store_00010001/2022-05-22
There are 2 files in folder '/store_00010001/2022-05-22'.
#1     20220522103015.MTS         rd 4194304 KB 1920x1080 video/mp4
#2     20220522110329.MTS         rd 4194304 KB 1920x1080 video/mp4

It appears to be PTP device:

$ gphoto2 --auto-detect
Model                          Port
----------------------------------------------------------
USB PTP Class Camera           usb:003,005
jjackson@mjolnir:~$ gphoto2 -a
Abilities for camera             : USB PTP Class Camera
Serial port support              : no
USB support                      : yes
Capture choices                  :
                                  : Image
                                  : Preview
Configuration support            : yes
Delete selected files on camera  : yes
Delete all files on camera       : no
File preview (thumbnail) support : yes
File upload support              : yes

I'm happy to mess around with patches, or force-enabling things if someone wants to give suggestions.