retry sup cropping with crop_sup

lib/encode.sh

@@ -198,6 +198,46 @@ replace_mkv_sup() {
     "${mergeCmd[@]}"
 }
 
+crop_sup() {
+    local inSup="$1"
+    local outSup="$2"
+    local left="$3"
+    local top="$4"
+    local right="$5"
+    local bottom="$6"
+    local warnMsg='Window is outside new screen area'
+    local maxAcceptableWarn=5
+    local offset=5
+
+    # skip cropping if not needed
+    if [[ "${left}${top}${right}${bottom}" == "0000" ]]; then
+        cp "${inSup}" "${outSup}" || return 1
+        return 0
+    fi
+
+    for ((try = 0; try < 30; try++)); do
+        echo_info "cropping sup with ${left} ${top} ${right} ${bottom}"
+        "${SUPMOVER}" \
+            "${inSup}" \
+            "${outSup}" \
+            --crop \
+            "${left}" "${top}" "${right}" "${bottom}" &>"${outSup}.out" || return 1
+        # supmover does not error for out-of-bounds subtitles
+        # so adjust crop value until there is most certainly no issue
+        if [[ "$(grep -c "${warnMsg}" "${cropSup}.out")" -gt ${maxAcceptableWarn} ]]; then
+            echo_warn "${warnMsg}, retrying... (try ${try})"
+            test "${left}" -gt ${offset} && left=$((left - offset))
+            test "${top}" -gt ${offset} && top=$((top - offset))
+            test "${right}" -gt ${offset} && right=$((right - offset))
+            test "${bottom}" -gt ${offset} && bottom=$((bottom - offset))
+        else
+            return 0
+        fi
+    done
+    # if we got here, all tries were had, so indicate failure
+    return 1
+}
+
 # extract PGS_SUB_STREAMS from INPUT
 # and crop using CROP_VALUE
 setup_pgs_mkv() {
@@ -226,19 +266,15 @@ setup_pgs_mkv() {
         cropMkv="${tmpdir}/${stream}.mkv"
         mkvextract "${INPUT}" tracks "${stream}:${ogSup}" || return 1
 
-        # check if PGS was uncropped
+        # check sup resolution
         local supRes
         supRes="$(get_sup_resolution "${ogSup}")" || return 1
-        # crop PGS if either initially cropping or "fixing"
-        # previously uncropped (relative to video) PGS subs
-        if [[ ${CROP_VALUE} != '' || ${supRes} != "${vidRes}" ]]; then
         local supWidth supHeight
         IFS=x read -r supWidth supHeight <<<"${supRes}"
         local left top right bottom
-
         # determine crop values
         # if the supfile is smaller than the video stream
-            # crop using aspect ratio
+        # crop using aspect ratio instead of resolution
         if [[ ${vidWidth} -gt ${supWidth} || ${vidHeight} -gt ${supHeight} ]]; then
             echo_warn "PGS sup (stream=${stream}) is somehow smaller than initial video stream"
             echo_warn "cropping based off of aspect ratio instead of resolution"
@@ -269,36 +305,10 @@ setup_pgs_mkv() {
             bottom=${top}
         fi
 
-            # only crop if actually required
-            if [[ "${left}${top}${right}${bottom}" != "0000" ]]; then
-                # crop sup
-                (
-                    set -x
-                    "${SUPMOVER}" \
-                        "${ogSup}" \
-                        "${cropSup}" \
-                        --crop \
-                        "${left}" "${top}" "${right}" "${bottom}" &>"${cropSup}.out" || return 1
-                )
-                local cropRet=$?
-                # supmover does not error for out-of-bounds subtitles
-                # so error only when there is most certainly an issue
-                if [[ "$(grep -c 'Window is outside new screen area' "${cropSup}.out")" -gt 5 ]]; then
-                    echo_fail "check ${cropSup}.out for complete logs"
-                    cropRet=1
-                fi
-                if [[ ${cropRet} -ne 0 ]]; then
+        if ! crop_sup "${ogSup}" "${cropSup}" "${left}" "${top}" "${right}" "${bottom}"; then
             rm -r "${tmpdir}" || return 1
             return 1
         fi
-            else
-                # create placeholder copy for replacement
-                cp "${ogSup}" "${cropSup}" || return 1
-            fi
-        else
-            # create placeholder copy for replacement
-            cp "${ogSup}" "${cropSup}" || return 1
-        fi
 
         if ! replace_mkv_sup "${INPUT}" "${cropSup}" "${cropMkv}" "${stream}"; then
             echo_fail "could not replace mkv sup for ${stream}"