GraphicsMagick: Cannot convert pdf to jpeg - pdf

Question

I am trying to convert a pdf document ( 95 pages ) to multiple JPEG files, but getting error:
$gm convert -verbose -density 300 TESTIO.pdf +adjoin FOO-%02d.jpg
[ghostscript library] "-q" "-dBATCH" "-dSAFER" "-dMaxBitmap=50000000" "-dNOPAUSE" "-sDEVICE=pnmraw" "-dTextAlphaBits=4" "-dGraphicsAlphaBits=4" "-r300x300" "-sOutputFile=/tmp/gm2BfrxJ" "--" "/tmp/gmWNsJU0" "-c" "quit"Error: /ioerror in --showpage--
Operand stack:
1 true
Execution stack:
%interp_exit .runexec2 --nostringval-- --nostringval-- --nostringval-- 2 %stopped_push --nostringval-- --nostringval-- --nostringval-- false 1 %stopped_push 1862 1 3 %oparray_pop 1861 1 3 %oparray_pop 1845 1 3 %oparray_pop --nostringval-- --nostringval-- 24 1 95 --nostringval-- %for_pos_int_continue --nostringval-- --nostringval-- 1745 0 9 %oparray_pop --nostringval-- --nostringval--
Dictionary stack:
--dict:1154/1684(ro)(G)-- --dict:1/20(G)-- --dict:76/200(L)-- --dict:76/200(L)-- --dict:106/127(ro)(G)-- --dict:286/300(ro)(G)-- --dict:22/25(L)-- --dict:4/6(L)-- --dict:22/40(L)--
Current allocation mode is local
Last OS error: 28
GPL Ghostscript 8.70: Unrecoverable error, exit code 1
gm convert: Unexpected end-of-file (/tmp/gm2BfrxJ).
Here is the config for GraphicsMagick:
$gm version
GraphicsMagick 1.3.25 2016-09-05 Q8 http://www.GraphicsMagick.org/
Copyright (C) 2002-2016 GraphicsMagick Group.
Additional copyrights and licenses apply to this software.
See http://www.GraphicsMagick.org/www/Copyright.html for details.
Feature Support:
Native Thread Safe yes
Large Files (> 32 bit) yes
Large Memory (> 32 bit) yes
BZIP no
DPS no
FlashPix no
FreeType no
Ghostscript (Library) yes
JBIG no
JPEG-2000 no
JPEG yes
Little CMS no
Loadable Modules no
OpenMP yes (200805)
PNG no
TIFF yes
TRIO no
UMEM no
WebP no
WMF no
X11 no
XML no
ZLIB no
Host type: x86_64-unknown-linux-gnu
Configured using the command:
./configure '--prefix=/usr/local' '--with-modules=yes' '--with-libtiff' '--with-jpeg' '--with-gslib'
Final Build Parameters:
CC = gcc -std=gnu99
CFLAGS = -fopenmp -g -O2 -Wall -pthread
CPPFLAGS =
CXX = g++
CXXFLAGS = -pthread
LDFLAGS =
LIBS = -ltiff -ljpeg -lgs -lm -lgomp -lpthread
also:
$ gs -version
GPL Ghostscript 9.20 (2016-09-26)
Copyright (C) 2016 Artifex Software, Inc. All rights reserved.

Answer 1

Firstly, you are using an ancient version of Ghostscript in your GraphicsMagick. I know that version has returned 9.20, but if you look in the error log you posted you will see "GPL Ghostscript 8.70: Unrecoverable error, exit code 1". So your GraphicsMagick installation is using 8.70.
This looks to me like its caused by the fact that all the output files are being sent to the same filename. The switch -sOutputFile=/tmp/gm2BfrxJ will write all the pages to a single file. If you want them to go to multiple files then you need to specify multiple page output, eg -sOutputFile=/tmp/gm2BfrxJ-%d or similar.
I suspect the problem is simply that GraphicsMagick isn't set up to deal with multiple page files like this. Do the conversion one page at a time. Or have Ghostscript render the pages to JPEG for you.