[sane-devel] Weird behavior in exagear.

[Jeff Sadowski]

interesting I searched for "scanimage # sane data follows" and came across

https://github.com/kkaempf/sane-backends/blob/master/frontend/scanimage.c

and looking at that it looks like I was getting a pnm header even
though I asked for a jpg.
maybe I need to install jpg packages to use scanimage to output a jpeg?

On Fri, Jan 5, 2018 at 2:53 PM, Jeff Sadowski <jeff.sadowski at gmail.com> wrote:
> Server side with saned
>
> root at raspberrypi:~:x86$ while [ 1 ];do saned -d 128;done
> [saned] main: starting debug mode (level 2)
> [saned] saned (AF-indep+IPv6) from sane-backends 1.0.24 starting up
> [saned] do_bindings: [0] bind failed: Address already in use
> [saned] check_host: access by remote host: ::ffff:192.168.1.252
> [saned] init: access granted to apache@::ffff:192.168.1.252
>
> gets to 96%ish then
>
> [saned] process_request: bad status 22
> [saned] bailing out, waiting for children...
> [saned] bail_out: all children exited
> [saned] main: starting debug mode (level 2)
> [saned] saned (AF-indep+IPv6) from sane-backends 1.0.24 starting up
> [saned] do_bindings: [0] bind failed: Address already in use
> ^C
>
>
>
> On Fri, Jan 5, 2018 at 2:44 PM, Jeff Sadowski <jeff.sadowski at gmail.com> wrote:
>> I started my scanner testing with my project. :-) My project phpsaneng
>> seems to be working.
>>
>> The way I want to use my scanner, not so much.
>>
>> Maybe one of you would know what is happening here. I currently have 2
>> ways to connect to my scanner. Via saned or using scanimage directly.
>>
>> I was surprised that both methods fail in two different ways.
>>
>> using saned from a second server:
>>
>> /usr/bin/scanimage  "-v" "-p" "--batch=preview.jpg" "--batch-count"
>> "1" "--format" "jpeg" "-l" "0" "-t" "0" "-x" "215.9" "-y" "355.6" "-d"
>> "net:192.168.1.27:brother2:bus1;dev1"
>>
>> results in
>>
>> scanimage: rounded value of br-x from 215.9 to 215.88
>> scanimage: rounded value of br-y from 355.6 to 355.567
>> Scanning 1 page, incrementing by 1, numbering from 1
>> Scanning page 1
>> scanimage: scanning image of size 1648x2314 pixels at 24 bits/pixel
>> scanimage: acquiring RGB frame
>> Progress: 96%
>> scanimage: min/max graylevel value = 11/255
>> Application transferred too few scanlines
>>
>> hexdump -c preview.jpg.part|head looks like so
>>
>> 0000000 377 330 377 340  \0 020   J   F   I   F  \0 001 001 001  \0 310
>> 0000010  \0 310  \0  \0 377 333  \0   C  \0  \b 006 006  \a 006 005  \b
>> 0000020  \a  \a  \a  \t  \t  \b  \n  \f 024  \r  \f  \v  \v  \f 031 022
>> 0000030 023 017 024 035 032 037 036 035 032 034 034       $   .   '
>> 0000040   "   ,   # 034 034   (   7   )   ,   0   1   4   4   4 037   '
>> 0000050   9   =   8   2   <   .   3   4   2 377 333  \0   C 001  \t  \t
>> 0000060  \t  \f  \v  \f 030  \r  \r 030   2   ! 034   !   2   2   2   2
>> 0000070   2   2   2   2   2   2   2   2   2   2   2   2   2   2   2   2
>> *
>> 0000090   2   2   2   2   2   2   2   2   2   2   2   2   2   2 377 300
>>
>> I can view this file in most image viewers
>>
>> directly from the server connected to the printer (a raspberry pi with
>> exagear to run the brother software)
>>
>> using
>>
>> /usr/bin/scanimage  "-v" "-p" "--batch=preview.jpg" "--batch-count"
>> "1" "--format" "jpeg" "-l" "0" "-t" "0" "-x" "215.9" "-y" "355.6" "-d"
>> "brother2:bus1;dev1"
>>
>> results in
>>
>> scanimage: rounded value of br-x from 215.9 to 215.88
>> scanimage: rounded value of br-y from 355.6 to 355.567
>> Scanning 1 pages, incrementing by 1, numbering from 1
>> Scanning page 1
>> scanimage: scanning image of size 1648x2314 pixels at 24 bits/pixel
>> scanimage: acquiring RGB frame
>> Progress: 100%
>> scanimage: min/max graylevel value = 11/255
>> scanimage: read 11440416 bytes in total
>> Scanned page 1. (scanner status = 5)
>>
>> hexdump -c preview.jpg|head
>>
>> 0000000   P   6  \n   #       S   A   N   E       d   a   t   a       f
>> 0000010   o   l   l   o   w   s  \n   1   6   4   8       2   3   1   4
>> 0000020  \n   2   5   5  \n  \f 021 031  \r 022 032  \f 021 030  \f 021
>> 0000030 030  \f 021 030  \f 021 030  \f 021 030  \r 022 031  \r 022 031
>> 0000040  \f 023 031  \f 021 030  \f 021 030  \f 021 030  \f 021 031  \f
>> 0000050 021 030  \f 021 030  \f 021 030  \v 020 027  \f 021 030  \r 022
>> 0000060 031  \v 020 027  \r 022 031  \f 023 031  \f 021 030  \f 021 030
>> 0000070  \v 020 027  \r 022 032  \r 022 031  \f 021 030  \f 021 030  \f
>> 0000080 021 030  \f 021 030  \f 021 030  \v 020 027  \f 021 030  \f 021
>> 0000090 030  \f 021 030  \f 021 030  \r 022 031  \r 024 032  \f 023 031
>>
>> And I can clearly see text in the file that doesn't look right.
>>
>> P6
>> # SANE data follows
>>
>> Image viewers say it isn't an image.
>>
>> Any ideas what is going on given that data?
>>
>> Is there anything I can run to get more debug data?