c - Issues with libdc1394 -

i trying images point grey firewire 1394 camera using libdc1394. here code.

#include <stdio.h> #include <stdint.h> #include <dc1394/dc1394.h> #include <stdlib.h> #include <inttypes.h>  #ifndef _win32 #include <unistd.h> #endif  #define image_file_name "image.ppm"  /*-----------------------------------------------------------------------  *  releases cameras , exits  *-----------------------------------------------------------------------*/ void cleanup_and_exit(dc1394camera_t *camera) {     dc1394_video_set_transmission(camera, dc1394_off);     dc1394_capture_stop(camera);     dc1394_camera_free(camera);     exit(1); }  int main(int argc, char *argv[]) {     file* imagefile;     dc1394camera_t *camera;     unsigned int width, height;     dc1394video_frame_t *frame=null;     //dc1394featureset_t features;     dc1394_t * d;     dc1394camera_list_t * list;     dc1394error_t err;      d = dc1394_new ();     if (!d)         return 1;     err=dc1394_camera_enumerate (d, &list);     dc1394_err_rtn(err,"failed enumerate cameras");      if (list->num == 0) {         dc1394_log_error("no cameras found");         return 1;     }      camera = dc1394_camera_new (d, list->ids[0].guid);     if (!camera) {         dc1394_log_error("failed initialize camera guid %llx", list->ids[0].guid);         return 1;     }     dc1394_camera_free_list (list);      printf("using camera guid %"prix64"\n", camera->guid);      /*-----------------------------------------------------------------------      *  setup capture      *-----------------------------------------------------------------------*/      err=dc1394_video_set_operation_mode(camera, dc1394_operation_mode_1394b);     dc1394_err_cln_rtn(err,cleanup_and_exit(camera),"could not set 1394b mode");      err=dc1394_video_set_iso_speed(camera, dc1394_iso_speed_800);     dc1394_err_cln_rtn(err,cleanup_and_exit(camera),"could not set iso speed");      err=dc1394_video_set_mode(camera, dc1394_video_mode_format7_0);     dc1394_err_cln_rtn(err,cleanup_and_exit(camera),"could not set video mode\n");      err=dc1394_format7_set_roi(camera, dc1394_video_mode_format7_0, dc1394_color_coding_raw16, dc1394_use_max_avail, 0, 0, 1024, 726);            dc1394_err_cln_rtn(err,cleanup_and_exit(camera),"could not roi\n");      err=dc1394_capture_setup(camera,4, dc1394_capture_flags_default);     dc1394_err_cln_rtn(err,cleanup_and_exit(camera),"could not setup camera-\nmake sure video mode , framerate are\nsupported camera\n");       /*-----------------------------------------------------------------------      *  gijs edit: show f7 info      *-----------------------------------------------------------------------*/     uint32_t unit_bytes;     uint32_t max_bytes;     err=dc1394_format7_get_packet_parameters(camera, dc1394_video_mode_format7_0, &unit_bytes, &max_bytes );     printf("\n[debug] f7 info\n");     printf("[debug] unit_byte: %d (error %d)\n", unit_bytes, err );        printf("[debug] max_bytes: %d (error %d)\n", max_bytes, err );     uint32_t packet_size;     err=dc1394_format7_get_packet_size(camera, dc1394_video_mode_format7_0, &packet_size );     printf("[debug] packet_size: %d (error %d)\n", packet_size, err );     uint32_t packets_per_frame;     err=dc1394_format7_get_packets_per_frame(camera, dc1394_video_mode_format7_0, &packets_per_frame );          printf("[debug] packets_per_frame: %d (error %d)\n", packets_per_frame, err );     uint32_t pixels_per_frame;     err=dc1394_format7_get_pixel_number(camera, dc1394_video_mode_format7_0, &pixels_per_frame );        printf("[debug] pixels_per_frame: %d (error %d)\n", pixels_per_frame, err );     uint32_t recommended_packet_size;     err=dc1394_format7_get_recommended_packet_size(camera, dc1394_video_mode_format7_0, &recommended_packet_size );     printf("[debug] recommended_packet_size: %d (error %d)\n", recommended_packet_size, err );     uint32_t total_bytes;     err=dc1394_format7_get_total_bytes(camera, dc1394_video_mode_format7_0, &total_bytes );     printf("[debug] total_size: %d (error %d)\n", total_bytes, err );      /*-----------------------------------------------------------------------      *  have camera start sending data      *-----------------------------------------------------------------------*/     err=dc1394_video_set_transmission(camera, dc1394_on);     dc1394_err_cln_rtn(err,cleanup_and_exit(camera),"could not start camera iso transmission\n");      /*-----------------------------------------------------------------------      *  capture 1 frame      *-----------------------------------------------------------------------*/     err=dc1394_capture_dequeue(camera, dc1394_capture_policy_wait, &frame);     dc1394_err_cln_rtn(err,cleanup_and_exit(camera),"could not capture frame\n");       /*-----------------------------------------------------------------------      *  check if frame corrupt      *-----------------------------------------------------------------------*/     printf("\n[debug] frame corrupt: ");     if( dc1394_capture_is_frame_corrupt( camera, frame) )     printf("yes\n");     else     printf("no\n");       /*-----------------------------------------------------------------------      *  show frame info      *-----------------------------------------------------------------------*/       printf("\n[debug] frame info\n");       printf("[debug] image_bytes: %d\n",           frame->image_bytes);       printf("[debug] size[0]: %d\n",               frame->size[0]);       printf("[debug] size[1]: %d\n",               frame->size[1]);             printf("[debug] allocated_image_bytes: %d\n", frame->allocated_image_bytes );       printf("[debug] total_bytes: %d\n",           frame->total_bytes );       printf("[debug] color_coding: %d\n",          frame->color_coding);            printf("[debug] color_filter: %d\n",          frame->color_filter);       printf("[debug] packet_size: %d\n",           frame->packet_size);             printf("[debug] packets_per_frame: %d\n",     frame->packets_per_frame);       printf("[debug] padding_bytes: %d\n",         frame->padding_bytes);       printf("[debug] timestamp: %d\n",             frame->timestamp);       printf("[debug] stride: %d\n",                frame->stride);       printf("[debug] data_depth: %d\n",            frame->data_depth);       printf("[debug] id: %d\n",                    frame->id);       printf("[debug] frames_behind: %d\n",         frame->frames_behind);       printf("[debug] image: %u\n",                 frame->image);           /*-----------------------------------------------------------------------      *  stop data transmission      *-----------------------------------------------------------------------*/     err=dc1394_video_set_transmission(camera,dc1394_off);     dc1394_err_cln_rtn(err,cleanup_and_exit(camera),"could not stop camera?\n");      /*-----------------------------------------------------------------------      *  save image 'image.pgm'      *-----------------------------------------------------------------------*/     imagefile=fopen(image_file_name, "wb");      if( imagefile == null) {         perror( "can't create output file");         cleanup_and_exit(camera);     }      width  = 1104;     height = 624;         fprintf(imagefile,"p6\n%u %u\n65536\n", width, height);     int nbytes = fwrite(frame->image, 2, height*width, imagefile);     fclose(imagefile);     printf("wrote: " image_file_name " (%d image bytes)\n",nbytes*2);      /*-----------------------------------------------------------------------      *  close camera      *-----------------------------------------------------------------------*/     dc1394_video_set_transmission(camera, dc1394_off);     dc1394_capture_stop(camera);     dc1394_camera_free(camera);     dc1394_free (d);     return 0; } 

it compiled when tried execute it. got following following error.

libdc1394 error: format_7 error_flag_1 set: in _dc1394_v130_handshake (format7.c, line 122): invalid image position, size, color coding or iso speed  libdc1394 error: format_7 error_flag_1 set: in dc1394_format7_set_roi (format7.c, line 803): handshaking failed after setting color_coding  libdc1394 error: format_7 error_flag_1 set: in main (test.c, line 90): not roi 

can 1 tell me how can set dc1394_format7_set_roi(parametre) , dc1394_video_set_mode (parameter) stero images.