added EXTRACTION_LENGTH for testing

scripts/extract_new_birdsounds.sh

@@ -128,6 +128,16 @@ for h in "${SCAN_DIRS[@]}";do
     # structured by-species, symbolic links are made to populate the new 
     # directory.
 
+    ### TESTING longer extraction context
+    set -x
+    SPACER=$(echo "(${EXTRACTION_LENGTH} - 3 )/2" |bc -l) 
+    START=$(echo "${START} - ${SPACER}"|bc -l)
+    END=$(echo "${END} + ${SPACER}"|bc -l)
+    
+    if (( $(echo "${START} < 0" | bc -l) ));then START=0;fi
+    if (( $(echo "${END} > ${RECORDING_LENGTH}" | bc -l) ));then END=${RECORDING_LENGTH};fi
+
+    set +x
     ffmpeg -hide_banner -loglevel error -nostdin -i "${h}/${OLDFILE}" \
       -acodec copy -ss "${START}" -to "${END}"\
         "${NEWSPECIES_BYDATE}/${a}-${NEWFILE}"