[Asterisk-Users] Re: SpanDSP TXFax and multipage faxes problems

Matthew junkmailtrapenator at gmail.com
Fri May 13 08:22:55 MST 2005 

I'd really like more info on how to correctly format a tiff for tx_fax too.

The only Tiff's we've been able to send using tx_fax with consistant
success are the ones that rx_fax creates when it receives an incoming
fax.

Here's the Tiff info from one such if its any help.

TIFF Directory at offset 0x17b9a
  Image Width: 1728 Image Length: 2150
  Resolution: 77, 77 pixels/cm
  Bits/Sample: 1
  Compression Scheme: CCITT Group 3
  Photometric Interpretation: min-is-white
  FillOrder: lsb-to-msb
  Date & Time: "2005/05/04 13:07:54"
  Host Computer: "asterisk1.local"
  Software: "spandsp"
  Orientation: row 0 top, col 0 lhs
  Samples/Pixel: 1
  Rows/Strip: (infinite)
  Planar Configuration: single image plane
  Page Number: 0-2
  Group 3 Options: 2-d encoding+EOL padding (5 = 0x5)
  Fax Data: clean (0 = 0x0)
  Fax Receive Time: 83 secs
TIFF Directory at offset 0x22ce4
  Image Width: 1728 Image Length: 2148
  Resolution: 77, 77 pixels/cm
  Bits/Sample: 1
  Compression Scheme: CCITT Group 3
  Photometric Interpretation: min-is-white
  FillOrder: lsb-to-msb
  Date & Time: "2005/05/04 13:08:35"
  Host Computer: "asterisk1.local"
  Software: "spandsp"
  Orientation: row 0 top, col 0 lhs
  Samples/Pixel: 1
  Rows/Strip: (infinite)
  Planar Configuration: single image plane
  Page Number: 1-2
  Group 3 Options: 2-d encoding+EOL padding (5 = 0x5)
  Fax Data: receiver regenerated (1 = 0x1)
  Bad Fax Lines: 7
  Consecutive Bad Fax Lines: 4
  Fax Receive Time: 39 secs

Unfortantly when i create tiff's using other programs (for example
ghostscript) with identical settings, they send, but the page sizes
get all messed up and parts of each page get cut off.





On 5/13/05, Nenad Radosavljevic <nenadr at deltaplan.co.yu> wrote:
> Hi !
> 
> Does anyone managed to send multipage faxes (in single TIFF file) with
> app_txfax from spandsp package (i'm using 0.0.2pre18, libtiff 3.7.1)?
> 
> If so, I'm interested in format of TIFF file that has been sent sent
> succesfully (tiffinfo <fax-filename>).
> 
> I'm having problems with app_txfax, sending first page successfuly 99 % of
> the time, but never managed to send second or third page (treid sending to
> Panasonic fax and to app_rxfax on other Asterisk through the PSTN).
> Receiving FAX machine hangs up after first page it got (no errors reported)
> and app_txfax is holding channel for ever (until soft hangup Zap/XX).
> 
> Here is my tiffinfo on 3 sample files I have tried to fax (on all three only
> first page being received):
> 
> LOW-RES fax file (204xx98):
> 
> lowres:/var/spool/asterisk/fax-out# tiffinfo FAX68.TIF
> TIFF Directory at offset 0x9160
>   Image Width: 1728 Image Length: 1173
>   Resolution: 204, 98 pixels/inch
>   Bits/Sample: 1
>   Compression Scheme: CCITT Group 3
>   Photometric Interpretation: min-is-white
>   FillOrder: lsb-to-msb
>   Samples/Pixel: 1
>   Rows/Strip: 1173
>   Planar Configuration: single image plane
>   Page Number: 0-3
>   Group 3 Options: EOL padding (4 = 0x4)
> TIFF Directory at offset 0x11eb6
>   Image Width: 1728 Image Length: 1173
>   Resolution: 204, 98 pixels/inch
>   Bits/Sample: 1
>   Compression Scheme: CCITT Group 3
>   Photometric Interpretation: min-is-white
>   FillOrder: lsb-to-msb
>   Samples/Pixel: 1
>   Rows/Strip: 1173
>   Planar Configuration: single image plane
>   Page Number: 1-3
>   Group 3 Options: EOL padding (4 = 0x4)
> TIFF Directory at offset 0x16e3e
>   Image Width: 1728 Image Length: 1173
>   Resolution: 204, 98 pixels/inch
>   Bits/Sample: 1
>   Compression Scheme: CCITT Group 3
>   Photometric Interpretation: min-is-white
>   FillOrder: lsb-to-msb
>   Samples/Pixel: 1
>   Rows/Strip: 1173
>   Planar Configuration: single image plane
>   Page Number: 2-3
>   Group 3 Options: EOL padding (4 = 0x4)
> 
> same file HI-RES (204x196) :
> 
> pbx:/var/spool/asterisk/fax-out# tiffinfo FAX67.TIF
> TIFF Directory at offset 0x128e8
>   Subfile Type: multi-page document (2 = 0x2)
>   Image Width: 1728 Image Length: 2347
>   Resolution: 204, 196 pixels/inch
>   Bits/Sample: 1
>   Compression Scheme: CCITT Group 3
>   Photometric Interpretation: min-is-white
>   FillOrder: lsb-to-msb
>   Samples/Pixel: 1
>   Rows/Strip: 2347
>   Planar Configuration: single image plane
>   Page Number: 0-3
>   Group 3 Options: EOL padding (4 = 0x4)
> TIFF Directory at offset 0x24a6c
>   Subfile Type: multi-page document (2 = 0x2)
>   Image Width: 1728 Image Length: 2347
>   Resolution: 204, 196 pixels/inch
>   Bits/Sample: 1
>   Compression Scheme: CCITT Group 3
>   Photometric Interpretation: min-is-white
>   FillOrder: lsb-to-msb
>   Samples/Pixel: 1
>   Rows/Strip: 2347
>   Planar Configuration: single image plane
>   Page Number: 1-3
>   Group 3 Options: EOL padding (4 = 0x4)
> TIFF Directory at offset 0x2ed84
>   Subfile Type: multi-page document (2 = 0x2)
>   Image Width: 1728 Image Length: 2347
>   Resolution: 204, 196 pixels/inch
>   Bits/Sample: 1
>   Compression Scheme: CCITT Group 3
>   Photometric Interpretation: min-is-white
>   FillOrder: lsb-to-msb
>   Samples/Pixel: 1
>   Rows/Strip: 2347
>   Planar Configuration: single image plane
>   Page Number: 2-3
>   Group 3 Options: EOL padding (4 = 0x4)
> 
> Here is tiffinfo of sample fax TIFF file that I have found looking for the
> TIFF/FAX specification - this one doesn't go either !
> 
> pbx:/var/spool/asterisk/fax-out# tiffinfo SAMPLEF.TIF
> TIFFReadDirectory: Warning, SAMPLEF.TIF: unknown field with tag 32860
> (0x805c) encountered.
> TIFFReadDirectory: Warning, SAMPLEF.TIF: unknown field with tag 32861
> (0x805d) encountered.
> TIFF Directory at offset 0x62cf
>   Subfile Type: multi-page document (2 = 0x2)
>   Image Width: 1728 Image Length: 852
>   Resolution: 204, 98 pixels/inch
>   Bits/Sample: 1
>   Compression Scheme: CCITT Group 3
>   Photometric Interpretation: min-is-white
>   FillOrder: lsb-to-msb
>   Date & Time: "1990:01:05 14:14:38"
>   Document Name: "C:\EFAX\EXAMPLE.TXT"
>   Image Description: "FAX"
>   Orientation: row 0 top, col 0 lhs
>   Samples/Pixel: 1
>   Rows/Strip: 852
>   Planar Configuration: single image plane
>   Page Number: 0-3
>   Software: EFax Version 2.2d74
>   Tag 32860: Tiff Ver 2.0
>   Tag 32861: 555-5555
>   Group 3 Options: EOL padding (4 = 0x4)
>   Fax Data: clean (0 = 0x0)
>   Bad Fax Lines: 0
>   Consecutive Bad Fax Lines: 0
> TIFFReadDirectory: Warning, SAMPLEF.TIF: unknown field with tag 32860
> (0x805c) encountered.
> TIFFReadDirectory: Warning, SAMPLEF.TIF: unknown field with tag 32861
> (0x805d) encountered.
> TIFF Directory at offset 0x7fd9
>   Subfile Type: multi-page document (2 = 0x2)
>   Image Width: 1728 Image Length: 292
>   Resolution: 204, 98 pixels/inch
>   Bits/Sample: 1
>   Compression Scheme: CCITT Group 3
>   Photometric Interpretation: min-is-white
>   FillOrder: lsb-to-msb
>   Date & Time: "1990:01:05 14:14:39"
>   Document Name: "C:\EFAX\EXAMPLE.TXT"
>   Image Description: "FAX"
>   Orientation: row 0 top, col 0 lhs
>   Samples/Pixel: 1
>   Rows/Strip: 292
>   Planar Configuration: single image plane
>   Page Number: 1-3
>   Software: EFax Version 2.2d74
>   Tag 32860: Tiff Ver 2.0
>   Tag 32861: 555-5555
>   Group 3 Options: EOL padding (4 = 0x4)
>   Fax Data: clean (0 = 0x0)
>   Bad Fax Lines: 0
>   Consecutive Bad Fax Lines: 0
> TIFFReadDirectory: Warning, SAMPLEF.TIF: unknown field with tag 32860
> (0x805c) encountered.
> TIFFReadDirectory: Warning, SAMPLEF.TIF: unknown field with tag 32861
> (0x805d) encountered.
> TIFF Directory at offset 0xab2f
>   Subfile Type: multi-page document (2 = 0x2)
>   Image Width: 1728 Image Length: 577
>   Resolution: 204, 98 pixels/inch
>   Bits/Sample: 1
>   Compression Scheme: CCITT Group 3
>   Photometric Interpretation: min-is-white
>   FillOrder: lsb-to-msb
>   Date & Time: "1990:01:05 14:14:39"
>   Document Name: "C:\EFAX\EXAMPLE.TXT"
>   Image Description: "FAX"
>   Orientation: row 0 top, col 0 lhs
>   Samples/Pixel: 1
>   Rows/Strip: 577
>   Planar Configuration: single image plane
>   Page Number: 2-3
>   Software: EFax Version 2.2d74
>   Tag 32860: Tiff Ver 2.0
>   Tag 32861: 555-5555
>   Group 3 Options: EOL padding (4 = 0x4)
>   Fax Data: clean (0 = 0x0)
>   Bad Fax Lines: 0
>   Consecutive Bad Fax Lines: 0
> 
> Regards,
>             Nenad Radosavljevic
> 
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