On Fri, Jan 04, 2019 at 04:39:27AM +0100, Marius Steffen wrote:
> Hi,
> 
> I’m having problems downloading RAW images from my Nikon D850, connected via 
> PTP/IP.
> The camera is configured in RAW+JPEG(Basic) S mode, so gphoto2 transfers the 
> JPEG file first, which succeeds.
> Afterwards, it is downloading the RAW file, but never finishes - instead, at 
> some point, it freezes, the camera finally disconnects (without gphoto2 
> noticing).
> Only manually aborting gphoto2 is shutting it down, without ever saving the 
> RAW file.
> 
> I’ve done some tests, and only ever observed this behavior when using 
> „Lossless compressed“ or „Uncompressed“ RAW file compression settings. 
> „Compressed“ (= lossy compression) seems to work though.
> 
> I’d like to have this fixed, and am willing to help of course, as this leads 
> to crashing my cameras WiFi, which then has to be turned on again using 
> SnapBridge.
> 
> I’ve attached the relevant log file, without the image data; the last part in 
> the full log is something like:
> 
> 36.773805 ptp_ptpip_generic_read      (3): ptpip/generic_read data: (hexdump 
> of 1176 bytes)
> 0000  f3 ef df df cf cf 6f df-5f 4f 4f df 7f df bd 7f  ......o._OO.....
> 0010  7f 7e fb f3 db ef 4f bd-ff 7e fc f4 fd fd fc fb  .~....O..~......
> 0020  d3 db 9b d3 8f ef 6f bf-3d fe fb f7 f3 db f3 8f  ......o.=.......
> 0030  f7 db f3 ef cf cf df bd-ff 7d 3e fb 93 ef bd b8  .........}>.....
> 0040  bd 3e f7 fb f3 f3 f3 f7-f7 f7 f3 ef df bf 3e f6  .>............>.
> 0050  fc f5 fb db f7 d7 f7 db-d3 f3 93 ef 5f cf df bf  ............_...
> 0060  3f 7f 3e fb f3 f7 f7 ef-bd 7f 3d bf 7f 3f 7f 7d  ?.>.......=..?.}
> 0070  7f 7d bd 7d 7f 3f 7f 7f-7f 7f 3d 7e fd fd f7 fb  .}.}.?....=~....
> 0080  f3 f3 f3 f3 ef df bf 3d-7f 7d bf 7e fc fd fb ef  .......=.}.~....
> 0090  bd 7f 3e fb db f7 d7 f3-ef cf b9 3f 7f 3e f5 fd  ..>........?.>..
> 00a0  fb f3 f7 ef bf 7e fc fd-fb d7 ef be e2 fd e5 fc  .....~..........
> 00b0  fb ef bd bf 7d 7d 3e e4-fc fb f7 f3 ef cf df 6f  ....}}>........o
> 00c0  cf 4f bd bf 38 3f 72 38-fe e5 fb f3 d7 ef be fb  .O..8?r8........
> 00d0  8f ef bf 7d fd 7f 7f 7e-fb f3 ef df be fb ef df  ...}...~........
> 00e0  be fc fd f7 f5 fc fd f5-f5 fb f7 f7 ef df bd 3e  ……………>
>               <SNIP>
> 0490  f3 9f f7 d7 ef df 4f 4f-                         ......OO 

Hi,

I have tried reproducing this with the Nikon D750 and Nikon Z6 over Wifi,
but failed... it downloads both JPG and uncompressed RAW.

How much data has been read from the NEF file at above step?

Is there another try to read after the 0490 ... line, or does it hang right 
there?

Does it hang there with the camera still on?


Can you attach gdb and check if it is hanging somewhere besides read?

Ciao, Marcus


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