no log: update fese library

This directly improves the integrity check of subtitles from the
Embedded Subtitles provider.

libs/fese/__init__.py

@@ -14,7 +14,7 @@ from babelfish import Language
 from babelfish.exceptions import LanguageError
 import pysubs2
 
-__version__ = "0.1.1"
+__version__ = "0.1.2"
 
 logger = logging.getLogger(__name__)
 
@@ -126,9 +126,28 @@ class FFprobeSubtitleStream:
         self.avg_frame_rate = stream.get("avg_frame_rate")
         self.time_base = stream.get("time_base")
         self.tags = stream.get("tags", {})
-        self.duration = float(stream.get("duration", 0))
         self.start_time = float(stream.get("start_time", 0))
-        self.duration_ts = int(stream.get("duration_ts", 0))
+
+        self.duration, self.duration_ts = 0, 0
+
+        # some subtitles streams miss the duration_ts field and only have tags->DURATION field
+        # fixme: we still don't know if "DURATION" is a common tag/key
+        if "DURATION" in self.tags:
+            try:
+                h, m, s = self.tags["DURATION"].split(":")
+            except ValueError:
+                pass
+            else:
+                self.duration = float(s) + float(m) * 60 + float(h) * 60 * 60
+                self.duration_ts = int(self.duration * 1000)
+        else:
+            try:
+                self.duration = float(stream.get("duration", 0))
+                self.duration_ts = int(stream.get("duration_ts", 0))
+            # some subtitles streams miss a duration completely and has "N/A" as value
+            except ValueError:
+                pass
+
         self.start_pts = int(stream.get("start_pts", 0))
 
         self.disposition = FFprobeSubtitleDisposition(stream.get("disposition", {}))
@@ -320,15 +339,21 @@ def check_integrity(
     except (pysubs2.Pysubs2Error, UnicodeError, OSError, FileNotFoundError) as error:
         raise InvalidFile(error) from error
     else:
-        off = abs(int(sub[-1].end) - subtitle.duration_ts)
-        if off > abs(sec_offset_threshold) * 1000:
-            raise InvalidFile(
-                f"The last subtitle timestamp ({sub[-1].end/1000} sec) is {off/1000} sec ahead"
-                f" from the subtitle stream total duration ({subtitle.duration} sec)"
+        # ignore the duration check if the stream has no duration listed at all
+        if subtitle.duration_ts:
+            off = abs(int(sub[-1].end) - subtitle.duration_ts)
+            if off > abs(sec_offset_threshold) * 1000:
+                raise InvalidFile(
+                    f"The last subtitle timestamp ({sub[-1].end/1000} sec) is {off/1000} sec ahead"
+                    f" from the subtitle stream total duration ({subtitle.duration} sec)"
+                )
+            logger.debug("Integrity check passed (%d sec offset)", off / 1000)
+        else:
+            logger.warning(
+                "Ignoring duration check, subtitle stream has bad duration values: %s",
+                subtitle,
             )
 
-        logger.debug("Integrity check passed (%d sec offset)", off / 1000)
-
 
 def to_srt(
     source: str, output: Optional[str] = None, remove_source: bool = False

libs/version.txt

@@ -6,7 +6,7 @@ charamel==1.0.0
 deep-translator==1.6.1
 dogpile.cache==1.1.5
 enzyme==0.4.1
-fese==0.1.1
+fese==0.1.2
 ffsubsync==0.4.20
 flask-restful==0.3.9
 Flask-SocketIO==5.1.1