From c1c73c0b0eb7a6172cc84d541d31e57d3e9e6d4f Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Mike=20F=C3=A4hrmann?= <mike_faehrmann@web.de>
Date: Mon, 21 Aug 2023 19:43:47 +0200
Subject: [PATCH] [pp:ugoira] add '"framerate": "uniform"' (#4421)

---
 docs/configuration.rst             |  2 ++
 gallery_dl/postprocessor/ugoira.py | 12 ++++++++----
 2 files changed, 10 insertions(+), 4 deletions(-)

diff --git a/docs/configuration.rst b/docs/configuration.rst
index 190ff91a..c29b2230 100644
--- a/docs/configuration.rst
+++ b/docs/configuration.rst
@@ -4906,6 +4906,8 @@ Description
 
     * ``"auto"``: Automatically assign a fitting frame rate
       based on delays between frames.
+    * ``"uniform"``: Like ``auto``, but assign an explicit frame rate
+      only to Ugoira with uniform frame delays.
     * any other ``string``:  Use this value as argument for ``-r``.
     * ``null`` or an empty ``string``: Don't set an explicit frame rate.
 
diff --git a/gallery_dl/postprocessor/ugoira.py b/gallery_dl/postprocessor/ugoira.py
index 8e84d5c0..b713c6f3 100644
--- a/gallery_dl/postprocessor/ugoira.py
+++ b/gallery_dl/postprocessor/ugoira.py
@@ -36,6 +36,7 @@ class UgoiraPP(PostProcessor):
         self.delete = not options.get("keep-files", False)
         self.repeat = options.get("repeat-last-frame", True)
         self.mtime = options.get("mtime", True)
+        self.uniform = False
 
         ffmpeg = options.get("ffmpeg-location")
         self.ffmpeg = util.expand_path(ffmpeg) if ffmpeg else "ffmpeg"
@@ -63,7 +64,9 @@ class UgoiraPP(PostProcessor):
         self.log.debug("using %s demuxer", demuxer)
 
         rate = options.get("framerate", "auto")
-        if rate != "auto":
+        if rate == "uniform":
+            self.uniform = True
+        elif rate != "auto":
             self.calculate_framerate = lambda _: (None, rate)
 
         if options.get("libx264-prevent-odd", True):
@@ -285,9 +288,10 @@ class UgoiraPP(PostProcessor):
         if self._delay_is_uniform(frames):
             return ("1000/{}".format(frames[0]["delay"]), None)
 
-        gcd = self._delay_gcd(frames)
-        if gcd >= 10:
-            return (None, "1000/{}".format(gcd))
+        if not self.uniform:
+            gcd = self._delay_gcd(frames)
+            if gcd >= 10:
+                return (None, "1000/{}".format(gcd))
 
         return (None, None)