Add more debug output

camogm.c

@@ -685,7 +685,7 @@ int sendImageFrame(camogm_state *state)
 	default: rslt = 0; // do nothing
 	}
 	if (rslt) {
-		D3(fprintf(debug_file, "sendImageFrame:12: camogm_frame_***() returned 0x%x\n", rslt));
+		D3(fprintf(debug_file, "sendImageFrame:12: camogm_frame_***() returned %d\n", rslt));
 		return rslt;
 	}
 	if (state->kml_used) rslt = camogm_frame_kml(state);  // will turn on state->kml_used if it can
@@ -1031,7 +1031,7 @@ void  camogm_status(camogm_state *state, char * fn, int xml)
 		fprintf(f, "greedy             %s\n",        state->greedy ? "yes" : "no");
 		fprintf(f, "ignore fps         %s\n",        state->ignore_fps ? "yes" : "no");
 		fprintf(f, "\n");
-		fprintf(f, "buffer overruns    %d\n",        state->last_error_code);
+		fprintf(f, "last error code    %d\n",        state->last_error_code);
 		fprintf(f, "buffer overruns    %d\n",        state->buf_overruns);
 		fprintf(f, "buffer minimal     %d\n",        state->buf_min);
 		fprintf(f, "buffer free        %d\n",        _b_free);

camogm_mov.c

@@ -180,7 +180,8 @@ int camogm_frame_mov(camogm_state *state)
 	iovlen = writev(state->ivf, chunks_iovec, (state->chunk_index) - 1);
 	if (iovlen < l) {
 		j = errno;
-		D0(fprintf(debug_file, "writev error %d (returned %d, expected %d)\n", j, iovlen, l));
+		D0(fprintf(debug_file, "writev error %d (returned %d, expected %d, file descriptor %d, chn %d)\n", j, iovlen, l, state->ivf, state->port_num));
+		perror(strerror(j));
 		close(state->ivf);
 		state->ivf = -1;
 		return -CAMOGM_FRAME_FILE_ERR;