[asterisk-users] SendFAX - multi-page TIFF

[Steve Underwood]

Hi Gabriel,

There is something weird about your pages. They are supposed to be 
1728x2292 pixels, and yet there are apparently 4969 rows in the strip.

Regards,
Steve


On 10/06/2012 10:07 PM, Gabriel Ortiz Lour wrote:
> I am using this command to generate the TIFF from a PDF:
>
> /usr/bin/gs -q -sDEVICE=tiffg3 -sPAPERSIZE=a4 -r204x196 -dNOPAUSE 
> -sOutputFile=$tiffFile -- $pdfFile
>
> And tiffinfo for a 2 page generate file gives:
>
> # tiffinfo teste.tiff
> TIFF Directory at offset 0x8 (8)
>   Subfile Type: multi-page document (2 = 0x2)
>   Image Width: 1728 Image Length: 2292
>   Resolution: 204, 196 pixels/inch
>   Bits/Sample: 1
>   Compression Scheme: CCITT Group 4
>   Photometric Interpretation: min-is-white
>   FillOrder: msb-to-lsb
>   Orientation: row 0 top, col 0 lhs
>   Samples/Pixel: 1
>   Rows/Strip: 4969
>   Planar Configuration: single image plane
>   Page Number: 0-0
>   Software: GPL Ghostscript 8.71
>   DateTime: 2012:10:04 22:16:14
>   Group 4 Options: (0 = 0x0)
> TIFF Directory at offset 0x394 (916)
>   Subfile Type: multi-page document (2 = 0x2)
>   Image Width: 1728 Image Length: 2292
>   Resolution: 204, 196 pixels/inch
>   Bits/Sample: 1
>   Compression Scheme: CCITT Group 4
>   Photometric Interpretation: min-is-white
>   FillOrder: msb-to-lsb
>   Orientation: row 0 top, col 0 lhs
>   Samples/Pixel: 1
>   Rows/Strip: 4969
>   Planar Configuration: single image plane
>   Page Number: 1-0
>   Software: GPL Ghostscript 8.71
>   DateTime: 2012:10:04 22:16:14
>   Group 4 Options: (0 = 0x0)
>
> I think this is correct, since it came from asterisk FAXing Howtos. Is 
> that correct?
> I'll try doing some more tests with debug info ON and post back the 
> results.
>
> Thanks,
> Gabriel
>
>
> 2012/10/5 Steve Underwood <steveu at coppice.org <mailto:steveu at coppice.org>>
>
>     On 10/06/2012 02:53 AM, Gabriel Ortiz Lour wrote:
>
>         Hi,
>
>           Does anyone had the problem of asterisk SendFax + spandsp
>         sending only the first page of a multi-page TIFF file?
>
>           Seams to be related to spandsp ECM config.
>
>           Any thoughts about it?
>
>         Thanks,
>         Gabriel
>
>     Check the file with tiffinfo. Perhaps the format of the second
>     page is different from the first, and incompatible with faxing.
>     Spandsp will renegotiate and continue sending if the second page
>     is of a different but valid format, but sending will end if the
>     second page is, say, colour or the wrong width.
>
>     Steve
>
>
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