diff --git a/CHANGELOG.md b/CHANGELOG.md
index 30ca06c..11f1950 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,15 @@
 # autocue changelog
 
+### 2024-07-02 – v4.0.5
+
+- Fixed a situation where `cue_file` would read a string duration from ffprobe for audio stream \#0, which led to an error in the AzuraCast log like this:
+  ```
+  2024/07/02 16:03:27 [autocue:2] Error while processing autocue: error(kind="json",message="Parsing error: json value cannot be parsed as type {duration: float, _}",positions="at autocue.liq, line 814 char 6 - line 826 char 10")
+  ```
+- `cue_file` now outputs the same duration for both tag reading and full analysis mode.
+- `cue_file` will not anymore write a `duration` tag to files. That was a newly introduced bug in v4.0.4.
+
+
 ### 2024-07-01 – v4.0.4
 
 - Allow to override results via JSON even _after_ having done a fresh analysis (automatic or forced), for ultimate flexibility when using `cue_file` for pre-processing. You can now add fades, ramp or hook points, or do other calculations and feed the results into `cue_file` for tagging. **Use with care**, because some values are dependent on others. In any case, `cue_file` will ever _only_ write tags beginning with `liq_` and (if requested) `replaygain_`.
@@ -7,6 +17,7 @@
 - Don’t write _all_ `liq_*` tags (could have side effects), but only those _known_ (see `cue_file --help` for current list).
 - Streamlined tag conversion code a little.
 
+
 ### 2024-06-18 – v4.0.3
 
 - Changed default of `-x`/`--extra` and `settings.autocue.cue_file.overlay_longtail` from `-15.0` LU to `-12.0` LU, requested by @RM-FM and the community. Together with the `-d`/`--drop` default change from `60.0` to `40.0`, this makes for a "tighter" playout and doesn’t lose too much of long or sustained endings.
diff --git a/autocue.cue_file.liq b/autocue.cue_file.liq
index e3986f8..3d086ea 100644
--- a/autocue.cue_file.liq
+++ b/autocue.cue_file.liq
@@ -38,6 +38,7 @@
 # 2024-06-18 - Moonbase59 - v4.0.3 - Changed overlay_longtail from -15 to -12,
 #                           most people seem to want transitions a bit tighter
 # 2024-07-01 - Moonbase59 - v4.0.4 - Sync with cue_file version
+# 2024-07-02 - Moonbase59 - v4.0.5 - Sync with cue_file version
 
 # Lots of debugging output for AzuraCast in this, will be removed eventually.
 
@@ -51,7 +52,7 @@ let settings.autocue.cue_file.version =
   settings.make(
     description=
       "Software version of autocue.cue_file. Should coincide with `cue_file`.",
-    "4.0.4"
+    "4.0.5"
   )
 
 # Internal only! Not a user setting.
diff --git a/cue_file b/cue_file
index dfc4efe..bab04ad 100755
--- a/cue_file
+++ b/cue_file
@@ -63,13 +63,14 @@
 #                         errors when piping something to cue_file
 #                       - streamline tag conversion code a little
 #                       - only write known tags, not all `liq_*`
+# 2024-07-02 Moonbase59 - v4.0.5 Fix minor bugs with file duration
 #
 # Originally based on an idea and some code by John Warburton (@Warblefly):
 #   https://github.com/Warblefly/TrackBoundaries
 # Some collaborative work with RM-FM (@RM-FM): Sustained ending analysis.
 
 __author__ = 'Matthias C. Hormann'
-__version__ = '4.0.4'
+__version__ = '4.0.5'
 
 import os
 import sys
@@ -356,10 +357,10 @@ def read_tags(
     tags_found = {**tags_in_stream, **tags_in_format, **tags_in_json}
     # eprint(json.dumps(tags_found, indent=2, sort_keys=True))
 
-    # add duration of stream #0
+    # add duration of stream #0 if it exists and can be converted to float
     try:
-        tags_found["duration"] = result['streams'][0]['duration']
-    except KeyError:
+        tags_found["duration"] = float(result['streams'][0]['duration'])
+    except (KeyError, ValueError):
         try:
             # we might have a video duration (.mka) like "00:07:01.117000000",
             # ignore
@@ -903,6 +904,10 @@ def write_tags(filename, tags={}, replaygain=False):
                 tags_new.pop(k, None)
             del tags_new["R128_TRACK_GAIN"]
 
+        # Never write "duration" to tags
+        if "duration" in tags_new:
+            del tags_new["duration"]
+
         # eprint(replaygain, temp, json.dumps(tags_new, indent=2))
 
         if MUTAGEN_AVAILABLE and filename.suffix.casefold() in mp4_ext:
@@ -1223,6 +1228,9 @@ if args.force or not skip_analysis:
     # allow to override even the analysis results
     if args.json:
         result = override_from_JSON(result, tags_json)
+    # override duration, seems ffprobe can be more exact
+    if "duration" in tags_found:
+        result["duration"] = tags_found["duration"]
 else:
     result = add_missing(tags_found, args.target, args.blankskip, args.noclip)