Merge pull request Zulko#2352 from OsaAjani/issue-2351

Fix wrong fps calculation
OsaAjani · Jan 30, 2025 · 06b5329 · 06b5329
2 parents 0f876ff + 41a815d
commit 06b5329
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diff --git a/CHANGELOG.md b/CHANGELOG.md
@@ -34,6 +34,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Improve perfs of decorator by pre-computing arguments
 - Fix textclip being cut or of impredictable height (see issues #2325, #2260 and #2268)
 - Fix TimeMirror and TimeSymmetrize cutting last second of clip
+- ImageSequenceClip was wrong when calculating fps with duration and no fps (see issue #2351)
 - Fix audiopreview not working with ffplay >= 7.0.0
 
 ## [v2.1.2](https://github.com/zulko/moviepy/tree/master)

diff --git a/moviepy/video/io/ImageSequenceClip.py b/moviepy/video/io/ImageSequenceClip.py
@@ -110,7 +110,7 @@ def __init__(
         self.sequence = sequence
 
         if fps is None:
-            self.fps = self.duration / len(sequence)
+            self.fps = len(sequence) / self.duration
 
         def find_image_index(t):
             return max(